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Ziosk Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

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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

<h3>Job Description</h3><div>Job Description<div>Salary: Software Engineering Manager (POS/Core API) (on-site) Plano, TXWelcome to Ziosk,where we empower restaurants to focus on what matters most: the guest experience!Have you ever used a tablet to pay at a restaurant?We pioneered the pay-at-the-table concept and were cooking up a plan to transform the restaurant industry. Our recipe for success has been adapting and growing to exceed the needs of our clients, such as Olive Garden, Texas Roadhouse, Chilis and more helping them create an experience that keeps guests coming back. Today we have a full menu of solutions, from hardware to software to cloud-based and AI driven products, all focused on helping them create the best guest experience possible to grow their bottom line.Our secret sauce?Our people! Every day, theyre cooking up bold solutions, making Ziosk the leading pay-at-the-table provider in the industry.Want a seat at our table?Ziosk is looking for a Software Engineering Manager to lead development efforts across our payments and loyalty platforms integration team. In this role, youll guide a team of developers and collaborate with cross-functional partners to drive system integrations and establish scalable integration frameworks that support a growing ecosystem of POS and loyalty plugins. This role blends technical leadership, managing and developing software engineers, hands-on development, and agile project management. Youll be instrumental in shaping how our integrations are designed, built, and delivered. The successful candidate will be self-motivated with attention to detail and the ability to establish and manage priorities in a fast paced, deadline-driven environment to meet commitments. Additionally, youll have a proven track record in a supervisory role attracting, developing, coaching, inspiring, and retaining software engineers.The Main Course Responsibilities<ul><li>Own the architecture, design, and implementation of scalable, Core API and C# services that power business-critical functionality.</li><li>Lead development of a unified API interface layer, ensuring consistency, extensibility, and ease of integration across internal and third-party systems.</li><li>Define and evolve core API patterns, versioning strategies, and governance to support long-term platform scalability.</li><li>Adapt and extend the API framework to support evolving business requirements and unlock new capabilities.</li><li>Guide integration efforts with external systems (e.g., POS, payment gateways, loyalty platforms), ensuring robust API contracts and minimal integration friction.</li><li>Improve onboarding and developer experience by delivering comprehensive API documentation, integration playbooks, and usage guidelines.</li><li>Proactively identify and resolve production issues related to API performance, stability, and downstream dependencies.</li><li>Champion API-first development practices and establish engineering standards for reusable service interfaces and internal SDKs.</li><li>Collaborate with Product, QA, and cross-functional teams to define API requirements, validate technical feasibility, and deliver scalable solutions.</li><li>Lead Agile ceremonies (sprint planning, standups, retrospectives) and oversee backlog prioritization to align with API roadmap and business goals.</li><li>Drive operational visibility through improved reporting and automation related to platform health, developer productivity, and integration metrics.</li></ul> What You Bring To The Table Qualifications<ul><li>6+ years of professional experience in software development, including 2+ years in a technical leadership or project management capacity.</li><li>Strong C# development background, with experience in .NET environments.</li><li>Proven experience designing and building integrations with third-party APIs.</li><li>Experience leading Agile/Scrum teams or managing sprint cycles.</li><li>Familiarity with POS, payments, or loyalty platforms (highly preferred).</li><li>Solid understanding of system architecture, RESTful API design, and integration best practices.</li><li>Excellent communication skills and ability to collaborate across departments.</li><li>Bachelors degree in Computer Science, Software Engineering, or a related field.</li></ul> Zioskis an Equal Opportunity employer offering competitive benefits and compensation. Candidates must be eligible to work in the U.S. and be able to commute daily to Plano, TX..No agencies or third-party recruiters, please.</div></div>

<h3>Job Description</h3><div>Job Description<div>Salary: Product Manager Online Survey and Reporting (On-site) - Plano, TXWelcome to Ziosk,where we empower restaurants to focus on what matters most: the guest experience!Have you ever used a tablet to pay at a restaurant?We pioneered the pay-at-the-table concept and were cooking up a plan to transform the restaurant industry. Our recipe for success has been adapting and growing to exceed the needs of our clients, such as Olive Garden, Texas Roadhouse, Chilis and more helping them create an experience that keeps guests coming back. Today we have a full menu of solutions, from hardware to software to cloud-based and AI driven products, all focused on helping them create the best guest experience possible to grow their bottom line.Our secret sauce?Our people! Every day, theyre cooking up bold solutions, making Ziosk the leading pay-at-the-table provider in the industry.Want a seat at our table?We are seeking a visionary and execution-driven Product Manager & Strategy for online survey and AI reporting to lead the development of our next-generation CXM. This strategic leader will define product vision, user experience, and go-to-market strategymanaging a third-party development partner to bring the platform to life.The ideal candidate has deep expertise in both customer experience and online surveys, with proven success in building or managing products that compete in this space. You will be expected to understand market trends, anticipate competitor moves, and position our product accordingly based on the attached competitive landscape.The Main Course ResponsibilitiesProduct Strategy & Ownership<ul><li>Own and define the platform vision, feature roadmap, and value proposition for a data-powered CXM/ORM solution.</li><li>Translate market opportunities and user needs into detailed product requirements, customer journeys, and success metrics.</li><li>Lead agile delivery efforts with an external development partner, ensuring high-quality and on-time releases.</li><li>Build differentiators that directly compete with leading platforms identified in the competitive analysis</li><li>Ensure the platform supports robust multi-location AI-driven insights, and scalable integration capabilities.</li></ul>Go-to-Market Execution<ul><li>Partner with Sales, Marketing, and Customer Success to develop launch playbooks, positioning strategies, competitive battle cards, and onboarding programs.</li><li>Define pricing models, market segmentation, and channel strategy tailored for enterprise and mid-market customers.</li></ul> Market Intelligence & Competitive Differentiation<ul><li>Leverage the attached competitive analysis to identify market gaps, feature parity opportunities, and unique selling points.</li><li>Continuously monitor competitor product updates, customer reviews, and emerging tech to inform product strategy and feature prioritization.</li></ul>UX/UI and Customer Research<ul><li>Oversee the end-to-end UX design process to ensure seamless and impactful user experiences.</li><li>Drive customer interviews, prototype testing, and usability studies to validate product-market fit.</li></ul>What You Bring To The Table Qualifications<ul><li>5+ years of experience in product strategy or management, with at least 2 years in a senior role focused on Customer Experience or Online Reputation Management.</li><li>Strong track record managing third-party development partners and aligning stakeholders across Product, Engineering, Sales, and Marketing.</li><li>Expertise in UX principles, journey mapping, and data-driven product development.</li><li>Ability to develop differentiated strategies grounded in market analysis and customer insight.</li><li>Bachelors degree in Business, Product Design, Computer Science, or a related field. MBA or similar advanced degree is preferred.</li></ul>Zioskis an Equal Opportunity employer offering competitive benefits and compensation. Candidates must be eligible to work in the U.S. and be able to commute daily to Plano, TX.No agencies or third-party recruiters, please.</div></div>

<h3>Job Description</h3><div>Job Description<div>Salary: Software Engineer (on site) - Plano Welcome to Ziosk,where we empower restaurants to focus on what matters most: the guest experience!Have you ever used a tablet to pay at a restaurant?We pioneered the pay-at-the-table concept and were cooking up a plan to transform the restaurant industry. Our recipe for success has been adapting and growing to exceed the needs of our clients, such as Olive Garden, Texas Roadhouse, Chilis and more helping them create an experience that keeps guests coming back. Today we have a full menu of solutions, from hardware to software to cloud-based and AI driven products, all focused on helping them create the best guest experience possible to grow their bottom line.Our secret sauce?Our people! Every day, theyre cooking up bold solutions, making Ziosk the leading pay-at-the-table provider in the industry.Want a seat at our table?Ziosk is seeking a highly skilled and detail-oriented Software Engineer to join our technical support and engineering team. This role focuses on diagnosing, troubleshooting, and resolving software and system issues across the Ziosk solution using skills in Android (C++, Kotlin, React Native), and Windows / Cloud (.Net C#). The ideal candidate will have a strong background in debugging complex systems and a passion for solving challenging technical problems in a fast-paced environment.Key Responsibilities:<ul><li>Perform root cause analysis and resolve software defects in production and development environments.</li><li>Debug and fix issues in applications built with C++, Kotlin, React Native, and C#.</li><li>Collaborate with development teams to implement long-term fixes and improvements.</li><li>Maintain detailed documentation of issues, resolutions, and preventive measures.</li><li>Provide technical support and guidance to internal teams and external clients.</li><li>Participate in code reviews and contribute to improving code quality and maintainability.</li><li>Monitor system performance and proactively identify potential issues.</li><li>Work with version control systems (e.g., Git) and CI/CD pipelines to deploy fixes efficiently.</li></ul> Required Skills & Qualifications:<ul><li>3+ years of experience in software engineering or technical support roles.</li><li>Proficiency in C++, C#, Kotlin, and Android development.</li><li>Strong debugging and problem-solving skills across multiple platforms.</li><li>Experience with tools such as Visual Studio and Android Studio.</li><li>Familiarity with mobile and desktop application architectures.</li><li>Understanding of RESTful APIs, multithreading, memory management, and performance optimization.</li><li>Excellent communication and documentation skills.</li><li>Ability to work independently and collaboratively in a team environment.</li><li>Ability to communicate directly with customers and non-technical team members.</li></ul>Nice to Have:<ul><li>Experience with Point of Sale (POS) solutions, especially in hospitality environments.</li><li>Familiarity with EMV Payments and payment processing systems.</li><li>Exposure to Digital Content Management platforms and workflows.</li><li>Experience with embedded systems or hardware integration.</li><li>Knowledge of cloud platforms (e.g., Azure, AWS) and backend services.</li><li>Familiarity with Agile methodologies and ticketing systems (e.g., Jira).</li></ul> Ziosk is an Equal Opportunity employer offering competitive benefits and compensation. Candidates must be eligible to work in the U.S. and be able to commute daily to Plano, TX.No agencies or third-party recruiters, please.</div></div>

<h3>Job Description</h3><div>Job Description<div>Salary: Welcome to Ziosk,where we empower restaurants to focus on what matters most: the guest experience!Have you ever used a tablet to pay at a restaurant?We pioneered the pay-at-the-table concept and were cooking up a plan to transform the restaurant industry. Our recipe for success has been adapting and growing to exceed the needs of our clients, such as Olive Garden, Texas Roadhouse, Chilis and more helping them create an experience that keeps guests coming back. Today we have a full menu of solutions, from hardware to software to cloud-based and AI driven products, all focused on helping them create the best guest experience possible to grow their bottom line.Our secret sauce?Our people! Every day, theyre cooking up bold solutions, making Ziosk the leading pay-at-the-table provider in the industry.Want a seat at our table?Ziosk is looking for a highly experiencedSenior Software Engineer to join ourGames Department.In this role, youll be working with the Games Module on Ziosk devices, which provide guests with different games and experiences at the table. Well be starting to publish our own experiences in addition to continuing to work with world-class vendors and their games.The Main Course Responsibilities (hybrid after onboarding)<ul><li>Build, maintain, and optimize responsivefront-endgame interfaces that run smoothly across various Ziosk devices and restaurant partner environments.</li><li>Work closely with designers and product managers to implement high-quality user experiences that drive engagement, dwell time, and revenue on the game menu.</li><li>Debug complex interactions betweenfront-endgame flows, APIs, and backend systems, ensuring seamless gameplay and accurate tracking.</li><li>Implement A/B tests and variants (e.g., button layouts, color schemes, free play offers) to improve conversion rates and guest engagement.</li><li>Work with prototypes to polish and fully develop a working game to put on devices and, in some cases, mobile devices/browsers</li></ul>What You Bring to the Table Qualifications<ul><li>Experience with React Native, Typescript, and Kotlin</li><li>Familiarity with best practices of UX patterns and flow for games and popular apps</li><li>At least one published game as a developer</li><li>Familiarity with game development from prototype to published products</li><li>C++, Java, and general Android knowledge is needed for legacy content</li><li>6+ years of professional experience in software development</li><li>2+ years of Azure serverless development experience</li><li>Experience with building integrations with third-party APIs</li><li>Outstanding cross-department communication skills</li><li>Bachelors degree in computer science, Software Engineering, or a related field</li><li>Familiarity with Unity is preferred</li></ul> Zioskis an Equal Opportunity employer offering competitive benefits and compensation. Candidates must be eligible to work in the U.S. and be able to commute daily to Plano, TX.No agencies or third-party recruiters, please.</div></div>

<h3>Job Description</h3><div>Job Description<div>Salary: Senior Software Engineer (On-site) Plano, TX Welcome to Ziosk, where we empower restaurants to focus on what matters most: the guest experience! Have you ever used a tablet to pay at a restaurant? We pioneered the pay-at-the-table concept and were cooking up a plan to transform the restaurant industry. Our recipe for success has been adapting and growing to exceed the needs of our clients, such as Olive Garden, Texas Roadhouse, Chilis and more helping them create an experience that keeps guests coming back. Today we have a full menu of solutions, from hardware to software to cloud-based and AI driven products, all focused on helping them create the best guest experience possible to grow their bottom line. Our secret sauce? Our people! Every day, theyre cooking up bold solutions, making Ziosk the leading pay-at-the-table provider in the industry. Want a seat at our table? Ziosk is looking for a Senior Software Engineer to spearhead novel projects that span multiple disciplines. In this role you will develop solutions that require device level programming, cloud engineering scalable systems and even some front-end web work. This role is perfect for engineers that like solving complex problems and using a variety of skillsets. You will have a direct hand in designing, building, and documenting projects. Candidates must be self-motivated, detail oriented, and have the ability to look at problems from multiple viewpoints to arrive at the best solution. The Main Course Responsibilities Architect and implement serverless Azure solutions Work with multiple teams to ensure data is effectively stored and reported Create web portals to manage and monitor systems Write mobile application components Create and maintain technical and customer-facing documentation What You Bring to the Table Qualifications 6+ years of professional experience in software development C# development background, with experience in .NET environments. 2+ years of Azure serverless development experience 2+ years of Kotlin development experience React Native development experience Familiarity with Typescript Proven experience designing and building integrations with third-party APIs. Solid understanding of system architecture, RESTful API design, and integration best practices. Excellent communication skills and ability to collaborate across departments. Bachelors degree in computer science, Software Engineering, or a related field. Ziosk is an Equal Opportunity employer offering competitive benefits and compensation. Candidates must be eligible to work in the U.S. and be able to commute daily to Plano, TX. No agencies or third-party recruiters, please. </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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