Prepare for and practice interview questions from Arista Networks.

Arista Networks Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

Arista Networks Interview Guides

Suppose there exists a new airline named Jetco that flies domestically across North America. Jetco recently had a study commissioned that tested the boarding time of every airline, and it came out that Jetco had the fastest average boarding times of any airline.

What factors could have biased this result, and what would you look into?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

What could potentially bias the average boarding time in favor of an airline that only flies domestically?

Boarding Times Bias

A new airline came out as the fastest average boarding times compared to other airlines.  What factors could have biased this result and what would you look into?

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

What is a key disadvantage of the F-test when compared to multiple t-tests?

What is a key disadvantage of the F-test when compared to multiple t-tests?

Hundreds of Hypotheses

You are testing hundreds of hypotheses with many t-tests. What considerations should be made?

In an A/B test, how can you check if assignment to the various buckets was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

In an A/B test, which of the following is a common method to determine if the assignment to the test groups was truly random?

Random Bucketing

A/B Testing & Experimentation

Arista Networks Salaries by Position

Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. Arista is a well-established and profitable company with over $5 billion in revenue. Arista’s award-winning platforms, ranging in Ethernet speeds up to 800G bits per second, redefine scalability, agility, and resilience. Arista is a founding member of the Ultra Ethernet consortium. We have shipped over 20 million cloud networking ports worldwide with CloudVision and EOS, an advanced network operating system. Arista is committed to open standards, and its products are available worldwide directly and through partners.At Arista, we value the diversity of thought and perspectives each employee brings. We believe fostering an inclusive environment where individuals from various backgrounds and experiences feel welcome is essential for driving creativity and innovation.Our commitment to excellence has earned us several prestigious awards, such as the Great Place to Work Survey for Best Engineering Team and Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest quality and performance standards in everything we do. Who You’ll Work WithAs a software engineer at Arista, you own your project end to end. You and your project team will work with product management and customers to define the requirements and design the architecture. You’ll build the backend, write automated tests, and get it deployed into production via our CD pipeline. As a senior member of the team you’ll also be expected to help mentor and grow new team members. This role demands a strong and broad software engineering background, and you won’t be limited to any single aspect of the product or development process.The candidate will be working with the WiFi team at Arista, developing cutting edge and next generation WiFi solutions in a fast-paced environment. The WiFi team is responsible for the end to end development of the Cloud managed WiFi product portfolio of Arista. This specific position is for the WiFi AccessPoint team. What You’ll DoAs a core member of the AccessPoint team, the candidate is expected to work closely with relevant teams to understand product requirements, design the solution, build the software and deliver it for final validation and customer deployment. The successful candidate will also keep track of new and emerging technologies and their impact on Arista products, come up with new and innovative ideas to improve and differentiate the product and help Arista become a leading player in the Campus space. The candidate will also work closely with sales and support teams to push new solutions, understand customer needs and pain points and help resolve escalations. The candidate is expected to have a strong background in software development and good understanding of systems and networking areas with the knowledge of the WiFi area as an added bonus.The candidate's role will not be limited to a single aspect of the product, it will be broad encompassing many different aspects including but not limited to developing new Access Points, designing and implementing new features, tracking new technologies and working closely with the sales and customer teams. Requirements:• Strong engineering and Computer Science fundamentals• Minimum 3-15 years of relevant experience• Well versed with programming in one of C/C++ languages• Experience working in a Linux environment, developing applications or Linux drivers Proven experience in Any of the below:1. Network device drivers, operating system internals, Kernels, compilers, SOC architecture2. User space development for connectivity related products (Wireless Lan access points/ controllers, networking equipment) in one or more of following areas: • HostAPD, Portal, RADIUS, AAA, Identity and role management, Radsec • Tunnels, Firewall, Iptables, Flow Classification, QoS, TLS, DTLS Preferred Skills:• Experience with Wi-Fi device drivers on Linux.• Hands-on experience in working with one or more WIFI chipset platforms• Good System Level understanding of the Wireless AP functionality• Experience in developing Wi-Fi features, system integration, evaluate various performance parameters

Cloud EOS Team· Arista Networks is the leader in building software driven cloud networks for today’s datacenter, cloud and campus environments. Arista delivers the most efficient, reliable and high performance Universal Cloud Network architectures based on 10G, 25G, 40G, 50G, 100G and 400G platforms delivered with an extensible operating system – Arista EOS®. Arista EOS is built on an open, programmable, and resilient state-sharing architecture that delivers maximum system uptime, reduces CAPEX and OPEX by simplifying IT operations and enables business agility.· We are building disruptive products and services that deliver highly automated networks that interconnect and secure connectivity between various global locations. As a part of the team you will be exposed to wide variety of technologies like EOS (Extensible Operating System), multithreaded, multicore software forwarding based on DPDK, public cloud (AWS, Azure, GCP) infrastructure, Path selection, NFV, Containers, Network Segmentation, Virtualization, microservice based architectures, CI/CD pipelines, and Terraform-based declarative provisioning models. As a core member of the CloudEOS team, you will be part of a fast paced, high-caliber team building cutting edge software products for Cloud-enabled WAN connectivity. The team is responsible for all aspects of the development and delivery of control plane, software data plane, and management platform/APIs/services.· Arista provides an open Engineering-driven culture which fosters innovation and enables engineers to Learn, Lead and Thrive. Our adoption of modern software tools, methodologies and processes and emphasis on automation enables our engineers to focus their energies on the truly complex problems and be among the most productive in the industry. Arista's products are purpose built with the scale, performance and quality required to operate in some of the most demanding environments - this provides engineers the platform and rigour to learn and gain experience in building complex, scalable software systems.Basic qualifications· Bachelor's/Master's degree in Engineering· 3+ years of experience working as a Systems Software Development Engineer· Proficiency in C++/C programming language· Software Development experience with LinuxPreferred qualifications· Experience with DPDK, Software Forwarding, Qos.· Python and/or Golang development experience· Strong communication skills and the ability to work in a team environment· Experience working through the complete software development life cycle right from requirements gathering to delivering the fully developed feature.· Strong software debugging skills especially in embedded systems.· Experience in Network Systems Software development is a plus

Arista Networks is the leader in software driven networking solutions for today’s largest Data Center (DC), Cloud, Internet/WAN, Service Provider (SP) and Campus environments. Arista has over 7500 customers ranging from the largest cloud providers, to healthcare, government, carrier, finance, education, and production web/SaaS companies. Arista's products are the foundation underpinning much of modern society's operations. Arista has ambitious plans and an unprecedented opportunity for growth and we are looking for many more engineers and designers to join us in building and innovating the world's networks. Arista is a profitable, publicly quoted company with revenues of over $8B with a culture of invention, quality, respect, and fun. As a Software Engineer your core responsibility is to deliver new product features. A major part of this is writing and owning the code that drives our products. However, the role of a Software Engineer is much bigger than ‘simply’ writing code. Software engineers work on the whole development process, including:<ul><li>Suggesting and deciding what features to build</li><li>Driving the design and architecture</li><li>Pushing, testing, documenting the feature</li><li>Working alongside customers in the field if needed</li></ul>Are you right for this role? This is an interesting and exciting opportunity to be a part of the software team that is redefining Data Centre switching. For success at Arista all you need is:<ul><li>Strong engineering and Computer Science fundamentals with 4-10 years of industry experience.</li><li>Extensive background in algorithms and strong software architecture skills</li><li>Fluency in one of C/C++/Python programming</li><li>Hands-on experience with designs and implementations in a strong product-engineering environment</li><li>Strong communication skills and the ability to work in a team environment</li><li>Experience working through the complete software development life cycle right from</li><li>requirements gathering to delivering the fully developed feature.</li></ul> Preferred qualifications (Any one of the below):<ul><li>Strong software debugging skills especially in embedded systems.</li><li>Experience with software development for the forwarding ASICs, FPGAs, Network Processors etc</li><li>Experience with DPDK, software forwarding, Qos, Layer 2 protocols like 802.1X, AAA, Macsec etc.</li><li>Experience with hardware abstraction layer</li><li>Experience in Network Systems Software development is a plus</li></ul>

<h3>Job Description</h3><div>Job Description<div>Company Description Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. What sets us apart is our relentless pursuit of innovation. We leverage the latest advancements in cloud computing, artificial intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current demands of the digital landscape but to also anticipate and adapt to future challenges.At Arista we value the diversity of thought and perspectives that each employee brings to the table. We  believe that fostering an inclusive environment, where individuals from various backgrounds and experiences feel welcome, is essential for driving creativity and innovation.Our commitment to excellence has earned us several prestigious awards, such as Best Engineering Team, Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest standards of quality and performance in everything we do.Job Description Who You’ll Work WithArista Networks is looking for world-class software engineers to join our Extensible Operating System (EOS) software development team. As a core member of the EOS team, you will be part of a fast-paced, high caliber team-building features to run the world's largest data center networks. Your software will be a key component of Arista's EOS, Arista's unique, Linux-based network operating system that runs on all of Arista's data center networking products.The EOS team is responsible for all aspects of the development and delivery of software meant to run on the various Arista switches. You will work with your fellow engineers and members of the marketing team to gather and understand the functional and technical requirements for upcoming projects. You will help write functional specifications, design specifications, test plans, and the code to bring all of these to life. You will also work with customers to triage and fix problems in their networks. Internally, you will develop automated tests for your software, monitor the execution of those tests, and triage and fix problems found by your tests. At Arista, you will own your projects from definition to deployment, and you will be responsible for the quality of everything you deliver.What You’ll DoThis role demands strong and broad software engineering fundamentals, and ideally a good understanding of networking including capabilities like L2, L3, and fundamentals of commercial switching HW. Your role will not be limited to a single aspect of EOS at Arista, but cover all aspects of EOS.Responsibilities:<ul><li>Write functional specifications and design specifications for features related to forwarding traffic on the internet and cloud data centers.</li><li>Independently implement solutions to small-sized problems in our EOS software, using the C and C++ programming languages.</li><li>Write test plan specifications for small-sized features in EOS, and implement automated test programs to execute the cases described in the test plan.</li><li>Debug problems found by our automated test programs and fix the problems. </li><li>Work on a team implementing, testing, and debugging solutions to larger routing protocol problems.</li><li>Worth with Customer Support Engineers to analyze problems in customer networks and provide fixes for those problems when needed in the form of new software releases or software patches.</li><li>Work with the System Test Engineers to analyze problems found in their tests and provide fixes for those problems.</li><li>Mentor new and junior engineers to bring them up to speed in Arista’s software development environment.</li><li>Review and contribute to the specifications and implementations written by other team members.</li><li>Help to create a schedule for the implementation and debugging tasks, update that schedule weekly, and report it to the project lead.</li></ul>Qualifications <ul><li>BSc, MS or Ph.D. in Computer Science/Electrical Engineering/Computer Engineering with 3+ years of related post graduate work experience</li><li>Knowledge of C and/or C++.</li><li>Knowledge of UNIX or Linux.</li><li>Understanding of L2/L3 networking including at least one of the following areas is desirable:</li><li>IP routing protocols, such as RIP, OSPF, BGP, IS-IS, or PIM.</li><li>Layer 2 features such as 802.1d bridging, the 802.1d Spanning Tree Protocol, the 802.1ax Link Aggregation Control Protocol, the 802.1AB Link Layer Discovery Protocol, or RFC 1812 IP routing.</li><li>Ability to utilize, test, and debug packet forwarding engine and a hardware component’s vendor provided software libraries in your solutions.</li><li>Infrastructure functions related to distributed systems such as messaging, signalling, databases, and command line interface techniques.</li><li>Hands on experience in the design and development of ethernet bridging or routing related software or distributed systems software is desirable.</li><li>Hands on experience with enterprise or service provider class Ethernet switch/router system software development, or significant PhD level research in the area of network routing and packet forwarding.</li><li>Applied understanding of software engineering principles.</li><li>Strong problem solving and software troubleshooting skills.</li><li>Ability to design a solution to a small-sized problem, and implement that solution without outside help. Able to work on a small team solving a medium-sized problem with limited oversight.</li></ul>Compensation InformationThe new hire base pay for this role has a salary range of $123,000 to $191,000. Arista offers different pay ranges based on work location, so that we can offer consistent and competitive pay appropriate to the market. The actual base pay offered will be based on a wide range of factors, including skills, qualifications, relevant experience, and work location. The pay range provided reflects base pay only and in addition certain roles may also be eligible for discretionary Arista bonuses and equity. Employees in Sales roles are eligible to participate in Arista’s Sales Incentive Plan, which pays commissions calculated as a percentage of eligible sales. US-based employees are also entitled to benefits including medical, dental, vision, wellbeing, tax savings and income protection. The recruiting team can share more details during the hiring process specific to the role and location.#LI-SZ1This is a mid-level software engineer requirement not applicable for fresh graduates or interns. Additional Information <div></div>Arista Networks is an equal opportunity employer.  Arista makes all hiring and employment-related decisions in a non-discriminatory manner without regard to race, color, religion, sex, sexual orientation, gender identity, national origin or any other factor determined to be unlawful under applicable federal, state, or law law.  All your information will be kept confidential according to EEO guidelines.</div></div>

<h3>Job Description</h3><div>Job Description<div>Company Description Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. What sets us apart is our relentless pursuit of innovation. We leverage the latest advancements in cloud computing, artificial intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current demands of the digital landscape but to also anticipate and adapt to future challenges.At Arista we value the diversity of thought and perspectives that each employee brings to the table. We  believe that fostering an inclusive environment, where individuals from various backgrounds and experiences feel welcome, is essential for driving creativity and innovation.Our commitment to excellence has earned us several prestigious awards, such as Best Engineering Team, Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest standards of quality and performance in everything we do.Job Description Who You’ll Work WithArista Networks is looking for world-class Senior/Lead Layer1 software engineers.As a Layer1 software engineer, you will get to work on software that manages the physical layer, where packets meet the outside world. Stable and reliable physical connectivity is critical for any network and that is your challenge. You will get to write control software that brings to life everything from the ubiquitous 1GBASE-T connectors to 1.6T long reach optics that provide fiber connectivity across continents. Your software will need to work across a wide variety of forwarding engines, connectors and interface chips called gearboxes, which allow our hardware platforms to support diverse physical connectivity options within a product family. You will build instrumentation and telemetry tools that track physical link health parameters reported by the Layer1 components and enable operators to monitor and troubleshoot their links effectively. You will also work closely with our Optics teams to define standards for new media and bring them to market.Arista Software Engineering roles demand a strong and broad software engineering background. While the primary focus area for this role is Layer1 software, the role will cover all aspects of software development spanning the addition of new features, debugging problems and fine tuning code for scalability and performance. You will own your projects from definition to deployment and customer interactions, and you will be responsible for the quality of everything you deliver. Arista Software Engineering prides itself on a supportive and growth oriented culture, which provides opportunities for increased responsibilities, and to expand expertise into new areas.What You’ll Do<ul><li>Interface with customers, product management and hardware engineers to come up with innovative new Layer1 features.</li><li>Architect, design and manage the development of these features.</li><li>Develop and maintain features using C, C++ and Python, review and contribute to functional and design specifications. Build automated tests and test infrastructure to test the features.</li><li>Work with hardware and manufacturing teams to bring new Layer1 components like Phys and Transceivers to market.</li><li>Collaborate with hardware engineers to design optimal software control interfaces for managing Layer1 components.</li><li>Provide technical leadership across features, projects and tools.</li><li>Work with Customer Support Engineers and customers to analyze, mitigate and fix problems in customer networks.</li><li>Work with the System Test Engineers to analyze problems found in their tests and provide fixes for those problems.</li><li>Mentor new and junior engineers to bring them up to speed in Arista's software development environment.</li></ul>Qualifications <ul><li>BS Computer Science/Electrical Engineering/Computer Engineering + 6 years experience, or MS Computer Science/Electrical Engineering/Computer Engineering + 4 years experience, or Ph.D. in Computer Science/Electrical Engineering/Computer Engineering + 3 years experience, or equivalent work experience</li><li>Expert knowledge of C or C++ and Python.</li><li>Experience working with low level hardware components</li><li>Knowledge of digital communication technologies like modulation and signal encoding schemes</li><li>Knowledge of UNIX or Linux</li><li>Understanding and ability to apply software engineering principles</li><li>Strong problem solving and software troubleshooting skills</li><li>Demonstrated technical leadership, strong communication skills, and the ability to work in a small team environment</li><li>Ability to design a solution and implement features independently</li><li>Understanding of IP networking and/or distributed systems is a plus</li></ul>#LI-SP1 Additional Information <div></div>Arista Networks is an equal opportunity employer.  Arista makes all hiring and employment-related decisions in a non-discriminatory manner without regard to race, color, religion, sex, sexual orientation, gender identity, national origin or any other factor determined to be unlawful under applicable federal, state, or law law.  All your information will be kept confidential according to EEO guidelines.</div></div>

<h3>Job Description</h3><div>Job Description<div>Company Description Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. What sets us apart is our relentless pursuit of innovation. We leverage the latest advancements in cloud computing, artificial intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current demands of the digital landscape but to also anticipate and adapt to future challenges.At Arista we value the diversity of thought and perspectives that each employee brings to the table. We  believe that fostering an inclusive environment, where individuals from various backgrounds and experiences feel welcome, is essential for driving creativity and innovation.Our commitment to excellence has earned us several prestigious awards, such as Best Engineering Team, Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest standards of quality and performance in everything we do.Job Description As a core member of the Platform software team, the candidate will be part of a fast-paced, high caliber team building diagnostic software to help validate high-speed digital designs and achieve high yields in manufacturing Arista Network products used in the computer networking industry's largest data centers.Who You’ll Work WithThe Platform software team is responsible for all aspects of the development and delivery of hardware validation and manufacturing diagnostic software. The successful candidate will work closely on a project from its early conception to the final production stage at an off-site contract manufacturer. They will work with fellow engineers and members of the hardware and manufacturing team to understand the design and validate it.  Besides closely working with the hardware engineers in designing the board, they will also review the hardware specifications and produce diagnostic specifications for the board. With that as a basis, the candidate will design the code to bring all of these to life. They will also work with customers to triage and fix problems in their networks. They will play a major role in improving yield at the contract manufacturer site as their software will be critical in validating the builds and quickly identify manufacturing defects.What You’ll DoThis role demands a strong and broad software engineering background, and a good understanding of hardware board design technology as well as third party network processors. The candidate's role will not be limited to any single aspect of managing ASIC-based networking solution, but cover all aspects of bringing up new hardware, developing all features requiring hardware validation, testing the software and hardware, and supporting our customers using the products. As an experienced engineer, this role also requires that they take an active part in organizing a team of engineers to tackle a project, providing vision for the project, managing the schedule for the project, and coordinating the activities of the team.<ul><li>Design, implement and test production-grade diagnostics for high-speed digital boards and  ASICS to help with hardware validation.</li><li>Design, implement and test manufacturing tests to validate mass production of digital boards used in data center networking product</li><li>Bring-up newly manufactured boards and the port the first level of software.</li><li>Isolate and perform root-cause analysis of reported failures</li><li>Support new platform software and hardware features</li><li>Coordinate with the hardware engineering team on bring-up schedules and feature delivery</li><li>Participate proactively in design discussions, design/code reviews, and project management</li><li>Create system software written in C and scripting languages (Python, Bash) for our Linux-based appliance platform</li><li>Work independently as well as in team roles.</li><li>Use a version control system to systematically document and version the diagnostic software.</li><li>Mentor younger members of the team and inculcate team spirit.</li></ul>Qualifications <ul><li>BS in Computer/Electrical Engineering or Computer Science with +5 years experience</li><li>Proficiency in C/C++</li><li>Well versed in scripting languages such as Python, Perl, TCL etc.</li><li>Embedded programming and good knowledge of OS internals (Linux/Unix)</li><li>In depth view of Computer Networking, OSI layers such as TCP/IP etc.</li><li>Has knowledge of common inter connecting buses and interfaces  such as  PCIE, I2C, XAUI, 10G Ethernet drivers, FPGA, Switch chips, SSL offload, TCAM programming.</li><li>Smart Bits and/or IXIA usage and performance improvement</li><li>Ability to appreciate software engineering principles and coding procedures</li></ul> Additional Information <div></div>Arista Networks is an equal opportunity employer.  Arista makes all hiring and employment-related decisions in a non-discriminatory manner without regard to race, color, religion, sex, sexual orientation, gender identity, national origin or any other factor determined to be unlawful under applicable federal, state, or law law.  All your information will be kept confidential according to EEO guidelines.</div></div>

<h3>Job Description</h3><div>Job Description<div>Company Description Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. What sets us apart is our relentless pursuit of innovation. We leverage the latest advancements in cloud computing, artificial intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current demands of the digital landscape but to also anticipate and adapt to future challenges.At Arista we value the diversity of thought and perspectives that each employee brings to the table. We  believe that fostering an inclusive environment, where individuals from various backgrounds and experiences feel welcome, is essential for driving creativity and innovation.Our commitment to excellence has earned us several prestigious awards, such as Best Engineering Team, Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest standards of quality and performance in everything we do.Job Description Who You’ll Work WithArista Networks is looking for world-class software engineers to join our Extensible Operating System (EOS) software development team. As a core member of the EOS team, you will be part of a fast-paced, high caliber team-building features to run the world's largest data center networks. Your software will be a key component of Arista's EOS, Arista's unique, Linux-based network operating system that runs on all of Arista's data center networking products.The EOS team is responsible for all aspects of the development and delivery of software meant to run on the various Arista switches. You will work with your fellow engineers and members of the marketing team to gather and understand the functional and technical requirements for upcoming projects. You will help write functional specifications, design specifications, test plans, and the code to bring all of these to life. You will also work with customers to triage and fix problems in their networks. Internally, you will develop automated tests for your software, monitor the execution of those tests, and triage and fix problems found by your tests. At Arista, you will own your projects from definition to deployment, and you will be responsible for the quality of everything you deliver.What You’ll DoThis role demands strong and broad software engineering fundamentals, and ideally a good understanding of networking including capabilities like L2, L3, and fundamentals of commercial switching HW. Your role will not be limited to a single aspect of EOS at Arista, but cover all aspects of EOS.Responsibilities:<ul><li>Write functional specifications and design specifications for features related to forwarding traffic on the internet and cloud data centers.</li><li>Independently implement solutions to small-sized problems in our EOS software, using the C and C++ programming languages.</li><li>Write test plan specifications for small-sized features in EOS, and implement automated test programs to execute the cases described in the test plan.</li><li>Debug problems found by our automated test programs and fix the problems. </li><li>Work on a team implementing, testing, and debugging solutions to larger routing protocol problems.</li><li>Worth with Customer Support Engineers to analyze problems in customer networks and provide fixes for those problems when needed in the form of new software releases or software patches.</li><li>Work with the System Test Engineers to analyze problems found in their tests and provide fixes for those problems.</li><li>Mentor new and junior engineers to bring them up to speed in Arista’s software development environment.</li><li>Review and contribute to the specifications and implementations written by other team members.</li><li>Help to create a schedule for the implementation and debugging tasks, update that schedule weekly, and report it to the project lead.</li></ul>Qualifications <ul><li>BSc, MS or Ph.D. in Computer Science/Electrical Engineering/Computer Engineering with 3+ years of related post graduate work experience</li><li>Knowledge of C and/or C++.</li><li>Knowledge of UNIX or Linux.</li><li>Understanding of L2/L3 networking including at least one of the following areas is desirable:</li><li>IP routing protocols, such as RIP, OSPF, BGP, IS-IS, or PIM.</li><li>Layer 2 features such as 802.1d bridging, the 802.1d Spanning Tree Protocol, the 802.1ax Link Aggregation Control Protocol, the 802.1AB Link Layer Discovery Protocol, or RFC 1812 IP routing.</li><li>Ability to utilize, test, and debug packet forwarding engine and a hardware component’s vendor provided software libraries in your solutions.</li><li>Infrastructure functions related to distributed systems such as messaging, signalling, databases, and command line interface techniques.</li><li>Hands on experience in the design and development of ethernet bridging or routing related software or distributed systems software is desirable.</li><li>Hands on experience with enterprise or service provider class Ethernet switch/router system software development, or significant PhD level research in the area of network routing and packet forwarding.</li><li>Applied understanding of software engineering principles.</li><li>Strong problem solving and software troubleshooting skills.</li><li>Ability to design a solution to a small-sized problem, and implement that solution without outside help. Able to work on a small team solving a medium-sized problem with limited oversight.</li></ul>#LI-SP1This is a mid-level software engineer requirement not applicable for fresh graduates or interns. Additional Information <div></div>Arista Networks is an equal opportunity employer.  Arista makes all hiring and employment-related decisions in a non-discriminatory manner without regard to race, color, religion, sex, sexual orientation, gender identity, national origin or any other factor determined to be unlawful under applicable federal, state, or law law.  All your information will be kept confidential according to EEO guidelines.</div></div>

<h3>Job Description</h3><div>Job Description<div>Company Description Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. What sets us apart is our relentless pursuit of innovation. We leverage the latest advancements in cloud computing, artificial intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current demands of the digital landscape but to also anticipate and adapt to future challenges.At Arista we value the diversity of thought and perspectives that each employee brings to the table. We  believe that fostering an inclusive environment, where individuals from various backgrounds and experiences feel welcome, is essential for driving creativity and innovation.Our commitment to excellence has earned us several prestigious awards, such as Best Engineering Team, Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest standards of quality and performance in everything we do.Job Description Who You’ll Work WithAs a Senior/Lead PFE software engineer, you will collaborate and work with customers, product management and engineers to design and build novel packet forwarding features in EOS that help networks run effectively and efficiently. You will need to understand the packet forwarding architecture in depth and figure out how to apply it optimally to solve customer problems. You will design the packet forwarding flow, design data structures and algorithms to render the packet forwarding state used by the forwarding engine for efficiency and scale, and tie it all together with the higher layers.  In this role, you will get to confront complex, multi-dimensional problems such as “Upgrade software on a switch with no more than a few milliseconds of downtime” or “Render a routing table with >1M routes into the forwarding path on a router with a hundred  forwarding chips” that are open ended, challenging, fun and require strong problem solving skills.Arista Software Engineering roles demand a strong and broad software engineering background. While the primary focus area for this role is packet forwarding, the role will cover all aspects of software development spanning the addition of new features, debugging problems and fine tuning code for scalability and performance. You will own your projects from definition to deployment and customer interactions, and you will be responsible for the quality of everything you deliver. Arista Software Engineering prides itself on a supportive and growth oriented culture, which provides opportunities for increased responsibilities, and to expand expertise into new areas. What You’ll Do<ul><li>Interface with customers and product management to define packet forwarding features and solutions.</li><li>Architect, design and manage the development of these features.</li><li>Develop and maintain features using C, C++ and Python, review and contribute to functional and design specifications. Build automated tests and test infrastructure to test the features.</li><li>Provide technical leadership across features, projects and tools.</li><li>Work with Customer Support Engineers and customers to analyze, mitigate and fix problems in customer networks.</li><li>Work with the System Test Engineers to analyze problems found in their tests and provide fixes for those problems.</li><li>Mentor new and junior engineers to bring them up to speed in Arista's software development environment.</li></ul>Qualifications <ul><li>BS Computer Science/Electrical Engineering/Computer Engineering + 6 years experience, or MS Computer Science/Electrical Engineering/Computer Engineering + 4 years experience, or Ph.D. in Computer Science/Electrical Engineering/Computer Engineering + 3 years experience, or equivalent work experience</li><li>Expert knowledge of C or C++ and Python.</li><li>Knowledge of UNIX or Linux</li><li>Experience working with packet forwarding chips and pipelines</li><li>Understanding of IP networking and/or distributed systems</li><li>Understanding and ability to apply software engineering principles</li><li>Strong problem solving and software troubleshooting skills</li><li>Demonstrated technical leadership, strong communication skills, and the ability to work in a small team environment</li><li>Ability to design a solution and implement features independently</li></ul>#LI-SP1 Additional Information <div></div>Arista Networks is an equal opportunity employer.  Arista makes all hiring and employment-related decisions in a non-discriminatory manner without regard to race, color, religion, sex, sexual orientation, gender identity, national origin or any other factor determined to be unlawful under applicable federal, state, or law law.  All your information will be kept confidential according to EEO guidelines.</div></div>

<h3>Job Description</h3><div>Job Description<div>Company Description Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. What sets us apart is our relentless pursuit of innovation. We leverage the latest advancements in cloud computing, artificial intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current demands of the digital landscape but to also anticipate and adapt to future challenges.At Arista we value the diversity of thought and perspectives that each employee brings to the table. We  believe that fostering an inclusive environment, where individuals from various backgrounds and experiences feel welcome, is essential for driving creativity and innovation.Our commitment to excellence has earned us several prestigious awards, such as Best Engineering Team, Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest standards of quality and performance in everything we do.Job Description Who You’ll Work WithWorking in Engineering Productivity (EngProd), you will collaborate and work with other engineers to design, build, scale, and operate the systems that the rest of Arista’s development teams use. The EngProd team uses industry-standard systems like Ansible, Bazel, Jenkins, Docker, Kubernetes, Grafana, MySQL, ElasticSearch, Kafka, and Redis, as well as internal systems that we’ve built from the ground-up to automate CI/CD, testing, analysis, and visualization. We believe scalability, reliability and observability are cornerstones of stable systems, and essential to meeting the high-performance tooling and infrastructure needs of the rapidly growing product development teams..Arista Software Engineering roles demand a strong and broad software engineering background. While the primary focus area for this role is EngProd, the role will not be limited to any single aspect of software development at Arista. It will cover all aspects of software development spanning the addition of new features, debugging problems and fine tuning code for scalability and performance. You will own your projects from definition to deployment and customer interactions, and you will be responsible for the quality of everything you deliver. Arista Software Engineering prides itself on a supportive and growth oriented culture. Over time, as your interests change, coupled with evolving business needs you will have the opportunity to switch from EngProd to other areas, if you like. What You’ll Do<ul><li>Provide technical leadership across features, projects and tools.</li><li>Review and contribute to the specifications and implementations written by other team members.</li><li>Design and develop features, feature tests and solutions. Fix bugs and refactor code as needed.</li><li>Work with Arista’s software engineers to identify bottlenecks and limitations in our workflows, tooling, and infrastructure and provide fixes for those problems.</li><li>Provide support for our tools and infrastructure to Arista’s development team.</li></ul>Qualifications <ul><li>BS Computer Science/Electrical Engineering/Computer Engineering + 6 years experience, or MS Computer Science/Electrical Engineering/Computer Engineering + 4 years experience, or Ph.D. in Computer Science/Electrical Engineering/Computer Engineering + 3 years experience, or equivalent work experience</li><li>Expert knowledge of one or more of Go, Python, Javascript / React</li><li>Software development experience with Linux</li><li>Knowledge and experience in of one of operating systems, networking systems, distributed systems</li><li>Understanding and ability to apply software engineering principles</li><li>Strong problem solving and software troubleshooting skills</li><li>Demonstrated technical leadership, strong communication skills, and the ability to work in a small team environment</li><li>Ability to design a solution and implement features independently</li></ul>#LI-SP1 Additional Information <div></div>Arista Networks is an equal opportunity employer.  Arista makes all hiring and employment-related decisions in a non-discriminatory manner without regard to race, color, religion, sex, sexual orientation, gender identity, national origin or any other factor determined to be unlawful under applicable federal, state, or law law.  All your information will be kept confidential according to EEO guidelines.</div></div>

<h3>Job Description</h3><div>Job Description<div>Company Description Arista Networks is an industry leader in data-driven, client-to-cloud networking for large data center, campus and routing environments. What sets us apart is our relentless pursuit of innovation. We leverage the latest advancements in cloud computing, artificial intelligence, and software-defined networking to provide our clients with a competitive edge in an increasingly interconnected world. Our solutions are designed to not only meet the current demands of the digital landscape but to also anticipate and adapt to future challenges.At Arista we value the diversity of thought and perspectives that each employee brings to the table. We  believe that fostering an inclusive environment, where individuals from various backgrounds and experiences feel welcome, is essential for driving creativity and innovation.Our commitment to excellence has earned us several prestigious awards, such as Best Engineering Team, Best Company for Diversity, Compensation, and Work-Life Balance. At Arista, we take pride in our track record of success and strive to maintain the highest standards of quality and performance in everything we do.Job Description Who You’ll Work WithYou will collaborate with team members to design, build, and manage secure, scalable, and fault-tolerant tools and infrastructure. What You’ll DoThe Arista Hardware team is responsible for designing and delivering the most technologically advanced networking equipment. As a Software Engineer, you will have the unique opportunity to work on a groundbreaking system that will serve the entire hardware team to deliver and grow our multi-billion dollar business line. You will be developing tools and processes focused on improving the productivity of the whole Hardware Engineers in the organization.You will drive the design and development of tools such as parsers and dashboards which aid in automated hardware verification. We are obsessed with continuously improving the level of automation in all hardware design areas. You will be responsible for continuously improving this automation infrastructure, maintaining the quality of our code through the code development of development and review processes, and mentor others in these efforts. Please note that this position is not eligible for remote work and requires the candidate to be local to the Bay Area.<ul><li>Create various tools integrating them to the Arista unified ecosystem. Support agile manufacturing by designing and developing tools that dynamically provide configuration information to tests, and automate manual, people-driven processes into data-driven workflows.</li><li>Build automated a closed-loop hardware testing infrastructure for Arista network switches, leveraging automation code written in Python and Go, by continuously improving test-coverage for development and field issues.</li><li>Define and drive quality code development processes to align the team.</li><li>Work with directly with hardware team customers to identify and develop key efforts that can drastically improve hardware development process in terms of quality and efficiency</li></ul>You will be responsible for:<ul><li>Building, integrating, and maintaining tools and infrastructure to support a rapidly growing team of 100+ engineers.</li><li>Aligning team on efforts to determine priorities with the greatest impact to the hardware team (including the tools team itself) </li><li>Monitoring and reporting of tools and infrastructure to ensure ongoing tools quality.</li><li>Writing and validating high-quality code adhering to Arista code development standards.</li><li>Documenting and validating developed features comprehensively.</li><li>Providing support to hardware team customers.</li></ul>Qualifications <ul><li>2+ years of hands-on experience.</li><li>Minimum of a Bachelor's degree in Computer Engineering, Electrical Engineering, or a related field (preferred).</li><li>Proficiency in programming languages including, but not limited to, Python, C++, and Golang.</li><li>Experience developing in a Linux environment.</li><li>A strong desire to improve processes and productivity through automation</li><li>Self motivated attitude whose also open to new ideas and other ways of thinking</li><li>An insaciable curiosity to learn new engineering disciplines</li><li>Experience working with multi-disciplined, cross-functional team</li></ul>Desirable Skills and Knowledge:<ul><li>Prior experience in developing and maintaining services.</li><li>Experience with CI/CD development work-flows and tools</li><li>Exposure to hardware design, verification, and analysis.</li></ul>Compensation Information The new hire base pay for this role has a salary range of $119,000 to $148,000. Arista offers different pay ranges based on work location, so that we can offer consistent and competitive pay appropriate to the market. The actual base pay offered will be based on a wide range of factors, including skills, qualifications, relevant experience, and work location. The pay range provided reflects base pay only and in addition certain roles may also be eligible for discretionary Arista bonuses and equity. Employees in Sales roles are eligible to participate in Arista’s Sales Incentive Plan, which pays commissions calculated as a percentage of eligible sales. US-based employees are also entitled to benefits including medical, dental, vision, wellbeing, tax savings and income protection. The recruiting team can share more details during the hiring process specific to the role and location.#LI-GR1 Additional Information <div></div>Arista Networks is an equal opportunity employer.  Arista makes all hiring and employment-related decisions in a non-discriminatory manner without regard to race, color, religion, sex, sexual orientation, gender identity, national origin or any other factor determined to be unlawful under applicable federal, state, or law law.  All your information will be kept confidential according to EEO guidelines.</div></div>

Question	Topic	Difficulty	Ask Chance
Boarding Times Bias	Statistics	Medium	Very High
Hundreds of Hypotheses	Statistics	Medium	Very High
Random Bucketing	A/B Testing & Experimentation	Medium	Very High

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