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Hx5 Interview Questions

A/B Testing

Algorithms

Analytics

Machine Learning

Probability

Product Metrics

Python

Statistics

Hx5 Interview Guides

Let’s say that your company is running a standard control and variant AB test on a feature to increase conversion rates on the landing page. The PM checks the results and finds a .04 p-value.

How would you assess the validity of the result?

Experiment Validity

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?

Let’s say you work for a social media company that has just done a launch in a new city. Looking at weekly metrics, you see a slow decrease in the average number of comments per user from January to March in this city.

The company has been consistently growing new users in the city from January to March.

What are some reasons why the average number of comments per user would be decreasing and what metrics would you look into?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

What metric could be used to measure if active users are still engaging on the platform despite an overall decrease in the average number of comments per user?

Decreasing Comments

How would you investigate a decline in the average number of comments per user?

Join to apply for the  Test Data Software Engineer  role at  HX5, LLC
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Join to apply for the  Test Data Software Engineer  role at  HX5, LLC
Alamogordo, New Mexico

HX5 is an award-winning provider of engineering, research and development, and technical services to clients such as NASA and the Department of Defense. Founded in 2004, HX5 is a fast-growing veteran- and woman-owned company with locations nationwide.
Scientist and Engineer I

Holloman Air Force Base

Alamogordo, New Mexico

HX5 is an award-winning provider of engineering, research and development, and technical services to clients such as NASA and the Department of Defense. Founded in 2004, HX5 is a fast-growing veteran- and woman-owned company with locations nationwide.

HX5 is currently seeking a Scientist or Engineer to support development of software to process test data collected at the Holloman High Speed Test Track (HHSTT) for the 846th Test Squadron (846TS) at Holloman Air Force Base near Alamogordo, New Mexico. The HHSTT is the world’s premier rocket sled test facility, and the 846TS works with customers to design, develop, and execute rocket sled tests to simulate selected portions of the flight environment in support of the development of weapon systems and other flight hardware.

Essential Duties And Responsibilities

Develop software for data acquisition, instrument control, and industrial automation.
Integrate and communicate with various sensors, actuators, and middleware.
Devise and evaluate criteria, parameters, characteristics, and interrelationships for design approaches and to assess the impact of new technology on current systems and processes.

Education and Experience:

Must have the following education and experience:

Technical or Scientific Degree from an accredited school.
Requires basic knowledge of signal processing, including frequency domain analysis and Fourier transforms.
Must have proficiency in MATLAB and/or Python, with a solid understanding of data structures, algorithms, and software design principles.
Must have familiarity with user interface (UI) design and user experience (UX) design.
Must have experience with data analytics and handling large datasets specifically related to hardware applications.
Must have familiarity with data visualization and analysis tools relevant to hardware products.

Position Type/Expected Hours of Work:

This is a full-time position requiring 40 hours per week and offers a flexible work schedule Monday through Friday during core business hours.

Other Position Requirements:

Proof of U.S. Citizenship or US Permanent Residency is a requirement for this position.
Must be able to complete a U.S. government background investigation.
Must be able to obtain a Secret clearance within six (6) months of start date.
Must be able to travel, including air travel.
Must be able to work in a fast-paced environment while being able to prioritize work to balance multiple projects and deadlines.
Exceptional oral and written communication skills, as well as strong interpersonal skills.

HX5 offers a competitive salary and benefits package to include:

Medical/Dental/Vision Insurance
401(k) plan with Company Match
Paid Holidays
Paid Time Off
Parental Leave
Life Insurance
Tuition Reimbursement
Identity Protection
Medical and Dependent Care Flexible Spending Accounts
Commuter/Transit Spending Accounts
Group Legal Coverage Options
Pet Insurance

HX5, LLC is an Equal Opportunity Employer that recruits and hires qualified candidates without regard to race, religion, sex, age, national origin, ancestry, citizenship, disability, or veteran status.

HX5, LLC is a Drug Free Workplace Employer.

ACCESSIBILITY NOTICE:

If you need a reasonable accommodation for any part of the employment process due to a physical or mental disability, please call (850) 362-6551.

CJ
Seniority level    Seniority level Entry level
Employment type    Employment type Full-time
Job function    Job function Engineering and Information Technology
Industries IT Services and IT Consulting
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Software Engineer Sr
Software Engineer Senior
Hill Air Force Base
Ogden, Utah
HX5 is an award-winning provider of engineering, research and development, and technical services to clients such as NASA and the Department of Defense. Founded in 2004, HX5 is a fast-growing veteran- and woman-owned company with locations nationwide.
HX5 is currently seeking a qualified Software Engineer, Senior in support of the Munitions Sustainment Division at Hill Air Force Base.
Essential Duties and Responsibilities:
Produce architectures which assess users’ needs, document planned and existing systems intended to meet the needs, determine deficiencies, develop alternative solutions, recommend solutions to meet the deficiencies, and support development of a plan to implement the chosen solution
Detail operational requirements and functional interactions within the system and with other systems, considering life cycle costs, logistics supportability, human factors, et al, to determine if the basic building blocks of the system are defined in sufficient detail to support a development program effort
Experienced with Information Technology (IT) systems, as well as the design, development, maintenance, testing, and evaluation of software, including familiarity with software Verification and Validation processes
Experience working on all stages of the software development life cycle (SDLC)
Develops, codes, tests, and debugs software and applications using Java
Designs features and makes improvements based on user experience data
Completes unit testing to identify and fix programming errors
Uses common testing and software documentation tools
Writes software documentation guides
Collaborates with other members of the software development team.
Desired Skills:
Familiarity with Infrastructure as Code (IaC) and Configuration as Code (CaC) using scripting languages such as Ansible, Terraform, Terragrunt, CloudFormation, Python, Java, JavaScript, Bash, PowerShell
Implementing and integrating DevSecOps tool chains for AWS cloud
Understand, evaluate, and suggest opportunities for modernization of enterprise platform services for Cloud One platform (Jenkins, Artifactory, Trend Micro, etc.)
Education andExperience:
Must have one of the following combinations of education and experience:
BS degree in Computer Science or Computer Business Systems
OR  a minimum of five (5) years of Munitions IT experience
DoD 8570 IAT Level II certification as outlined in DoD 8570.01-M; Security+ preferred certification
Experience with munitions supply systems and munitions processes
Position Type/Expected Hours of Work:
This is a full-time position requiring 40 hours per week and offers a flexible work schedule Monday through Friday during core business hours.
Other Position Requirements:
Proof of U.S. Citizenship or US Permanent Residency is a requirement for this position.
Must be able to complete a U.S. government background investigation.
Must be able to obtain and maintain a Secret clearance.
Must be able to travel, including air travel.
HX5 offers a competitive salary and benefits package to include:
Medical/Dental/Vision Insurance
401(k) plan with Company Match
Paid Holidays
Paid Time Off
Parental Leave
Life Insurance
Tuition Reimbursement
Identity Protection
Medical and Dependent Care Flexible Spending Accounts
Commuter/Transit Spending Accounts
Group Legal Coverage Options
Pet Insurance
HX5, LLC is an Equal Opportunity Employer that recruits and hires qualified candidates without regard to race, religion, sex, sexual orientation, gender identity, age, national origin, ancestry, citizenship, disability, or veteran status.
HX5, LLC is a Drug Free Workplace Employer.
ACCESSIBILITY NOTICE:
If you need a reasonable accommodation for any part of the employment process due to a physical or mental disability, pleasecall (850) 362-6551.
CJ

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Software Engineer
Software Engineer III
NASA Glenn Research Center
Cleveland, Ohio
HX5 is an award-winning provider of engineering, research and development, and technical services to clients such as NASA and the Department of Defense. Founded in 2004, HX5 is a fast-growing veteran- and woman-owned company with locations nationwide.
HX5 is currently seeking a Software Engineer to join our team in Cleveland, Ohio in support of the GEARS contract at NASA Glenn Research Center (GRC).
Essential Duties and Responsibilities:
The selected Software Engineer will build MATLAB code-based models of Power Management and Distribution (PMAD) systems in a GRC developed object-oriented modeling tool as needed to support incoming project work. The Software Engineer will produce documentation describing models generated which will include test results and will also assist NASA in the presentation of test results.
Required Skills:
Five+ years of experience with object-oriented programming is required.
MATLAB experience required.
Classroom or better experience with power systems analysis (load flow analysis).
Experience writing technical reports and presentations.

Other Desired Skills:
Experience writing technical reports and presentations is preferred.
Experience with SPICE circuit modeling is a plus.
Experience working in a highly regulated development environment is a plus.

Education/Experience:
Electrical, Software, or Computer Engineering degree (preferably from an ABET accredited program) with the following years of experience:
Bachelor’s degree with 5 to 10 years of experience
Master’s degree with 3 to 6 years of experience
Other Position Requirements:
Proof of U.S. Citizenship or US Permanent Residency is a requirement for this position.
Must be able to complete a U.S. government background investigation.
HX5 offers a competitive salary and benefits package to include:
Relocation Assistance
401(k) plan with Company Match
Paid Holidays
Paid Time Off
Life Insurance
Tuition Reimbursement
Identity Protection
Medical and Dependent Care Flexible Spending Accounts
Commuter/Transit Spending Accounts
Group Legal Coverage Options
Pet Insurance
HX5, LLC is an Equal Opportunity Employer that recruits and hires qualified candidates without regard to race, religion, sex, sexual orientation, gender identity, age, national origin, ancestry, citizenship, disability, or veteran status.
HX5, LLC is a Drug Free Workplace Employer.
ACCESSIBILITY NOTICE: If you need a reasonable accommodation for any part of the employment process due to a physical or mental disability, please call (850) 362-6551.
About the company  Notice  Talentify is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, or protected veteran status.
Talentify provides reasonable accommodations to qualified applicants with disabilities, including disabled veterans. Request assistance at accessibility@talentify.io or 407-000-0000.
Federal law requires every new hire to complete Form I-9 and present proof of identity and U.S. work eligibility.
An Automated Employment Decision Tool (AEDT) will score your job-related skills and responses. Bias-audit & data-use details: www.talentify.io/bias-audit-report . NYC applicants may request an alternative process or accommodation at aedt@talentify.io or 407-000-0000.

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Test Data Software Engineer
Scientist and Engineer I
Holloman Air Force Base
Alamogordo, New Mexico
HX5 is an award-winning provider of engineering, research and development, and technical services to clients such as NASA and the Department of Defense. Founded in 2004, HX5 is a fast-growing veteran- and woman-owned company with locations nationwide.

HX5 is currently seeking a Scientist or Engineer to support development of software to process test data collected at the Holloman High Speed Test Track (HHSTT) for the 846th Test Squadron (846TS) at Holloman Air Force Base near Alamogordo, New Mexico. The HHSTT is the world’s premier rocket sled test facility, and the 846TS works with customers to design, develop, and execute rocket sled tests to simulate selected portions of the flight environment in support of the development of weapon systems and other flight hardware.
Essential Duties and Responsibilities
Develop software for data acquisition, instrument control, and industrial automation.
Integrate and communicate with various sensors, actuators, and middleware.
Devise and evaluate criteria, parameters, characteristics, and interrelationships for design approaches and to assess the impact of new technology on current systems and processes.
Education and Experience:
Must have the following education and experience:
Technical or Scientific Degree from an accredited school.
Requires basic knowledge of signal processing, including frequency domain analysis and Fourier transforms.
Must have proficiency in MATLAB and/or Python, with a solid understanding of data structures, algorithms, and software design principles.
Must have familiarity with user interface (UI) design and user experience (UX) design.
Must have experience with data analytics and handling large datasets specifically related to hardware applications.
Must have familiarity with data visualization and analysis tools relevant to hardware products.
Position Type/Expected Hours of Work:
This is a full-time position requiring 40 hours per week and offers a flexible work schedule Monday through Friday during core business hours.
Other Position Requirements:
Proof of U.S. Citizenship or US Permanent Residency is a requirement for this position.
Must be able to complete a U.S. government background investigation.
Must be able to obtain a Secret clearance within six (6) months of start date.
Must be able to travel, including air travel.
Must be able to work in a fast-paced environment while being able to prioritize work to balance multiple projects and deadlines.
Exceptional oral and written communication skills, as well as strong interpersonal skills.
HX5 offers a competitive salary and benefits package to include:
Medical/Dental/Vision Insurance
401(k) plan with Company Match
Paid Holidays
Paid Time Off
Parental Leave
Life Insurance
Tuition Reimbursement
Identity Protection
Medical and Dependent Care Flexible Spending Accounts
Commuter/Transit Spending Accounts
Group Legal Coverage Options
Pet Insurance
HX5, LLC is an Equal Opportunity Employer that recruits and hires qualified candidates without regard to race, religion, sex, age, national origin, ancestry, citizenship, disability, or veteran status.
HX5, LLC is a Drug Free Workplace Employer.
ACCESSIBILITY NOTICE:
If you need a reasonable accommodation for any part of the employment process due to a physical or mental disability, pleasecall (850) 362-6551.
CJ

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Data Scientist / Analyst Scientist and Engineer III Holloman Air Force Base Alamogordo, New Mexico HX5 is an award-winning provider of engineering, research and development, and technical services to clients such as NASA and the Department of Defense. Founded in 2004, HX5 is a fast-growing veteran- and woman-owned company with locations nationwide. HX5 is currently seeking a qualified candidate to join our team in Alamogordo, New Mexico at Holloman Air Force Base in Support of the Holloman High Speed Test Track (HHSTT) in data analysis associated with sled testing. Essential Duties and Responsibilities <ul> <li>Use a variety of software and analytic methods to deduce test conditions. Test data sources include, but are not limited to, Doppler radars, high speed cameras, and data acquisition systems that acquire data from a variety of sensors to include accelerometers, pressure sensors, thermocouples, load cells, and angular rate sensors. </li> <li>Able to create or code simple software tools to analyze test data, typically MATLAB. </li> <li>Draw conclusions based on test data and compile information into a detailed technical report. Reports will summarize testing overview, test setup configuration, results, and conclusions, and may be over 100 pages in length, requiring multiple iterations of review and further editing. As such, strong writing skills are a must. </li> <li>Establish reporting timelines for post-test data processing and publish written technical reports. </li> <li>Document test setup procedures performed by personnel, including equipment used, configuration settings, and environmental conditions to ensure accuracy and repeatability of tests. Can include up to entire shifts of time in the field documenting pre- and post-test conditions. </li> <li>Understand and communicate technical information to stakeholders across various disciplines, both verbally and in writing. </li> <li>Assist in the creation and archival of accurate and timely test documentation including contract documents, test plans, safety plans, security plans, launch orders, and mission reports. </li> <li>Communicate effectively with test team and customers to achieve proper data collection. Primary modes of communication include technical reports, presentations, and meetings/email correspondence. </li> <li>A working knowledge of statistics is highly desirable. </li> </ul>Education and Experience: Must have one of the following combinations of education and experience: <ul> <li class="MsoNormal">BS or MS degree in a technical or scientific field and 3 to 10 years of experience </li><li class="MsoNormal">Exceptional oral and written communication skills, as well as strong interpersonal skills. </li></ul> Position Type/Expected Hours of Work: This is a full-time position requiring 40 hours per week and offers a flexible work schedule Monday through Friday during core business hours. Working outside normal work hours may be required occasionally in support of testing, including evenings, weekends, and holidays (but generally infrequently). Other Position Requirements: <ul type="disc"> <li class="MsoNormal">Proof of U.S. Citizenship or US Permanent Residency is a requirement for this position. </li><li class="MsoNormal">Must be able to complete a U.S. government background investigation. </li><li class="MsoNormal">Must be able to obtain a Secret clearance within six (6) months of start date. </li><li class="MsoNormal">Must be able to travel, including air travel. </li></ul> HX5 offers a competitive salary and benefits package to include: <ul type="disc"> <li class="MsoNormal">Medical/Dental/Vision Insurance </li><li class="MsoNormal">401(k) plan with Company Match </li><li class="MsoNormal">Paid Holidays </li><li class="MsoNormal">Paid Time Off </li><li>Parental Leave </li><li class="MsoNormal">Life Insurance </li><li class="MsoNormal">Tuition Reimbursement </li><li class="MsoNormal">Identity Protection </li><li class="MsoNormal">Medical and Dependent Care Flexible Spending Accounts </li><li class="MsoNormal">Commuter/Transit Spending Accounts </li><li class="MsoNormal">Group Legal Coverage Options </li><li class="MsoNormal">Pet Insurance </li></ul> HX5, LLC is an Equal Opportunity Employer that recruits and hires qualified candidates without regard to race, religion, sex, sexual orientation, gender identity, age, national origin, ancestry, citizenship, disability, or veteran status. HX5, LLC is a Drug Free Workplace Employer. ACCESSIBILITY NOTICE: If you need a reasonable accommodation for any part of the employment process due to a physical or mental disability, pleasecall (850) 362-6551. CJ

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