Prepare for and practice interview questions from Harness.

Harness Interview Questions

Harness 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

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?

Let’s say we have a table with an <code>id</code> and <code>name</code> fields. The table holds over 100 million rows and we want to sample a random row in the table without throttling the database.

Write a query to randomly sample a row from this table.

Input:

<code>big_table</code> table

<table>
<thead>
<tr>
<th>Columns</th>
<th>Type</th>
</tr>
</thead>

<tbody>
<tr>
<td><code>id</code></td>
<td>INTEGER</td>
</tr>

<tr>
<td><code>name</code></td>
<td>VARCHAR</td>
</tr>
</tbody>
</table>

Write a query to randomly sample a row from a big table.

Random SQL Sample

Harness Salaries by Position

POSITION SUMMARYWe're thrilled to invite passionate backend engineers to join our dynamic product team within the AI Developer Assistant product division. As we continue to expand our cutting-edge Generative AI and machine learning product, your role will be pivotal in driving its growth and evolution. Join us in shaping the future of AI-driven innovation in software delivery, where endless opportunities for professional development and impact await.You’ll join the AI QA Assistant engineering team, focusing on end-to-end testing of web applications. The team is developing a Generative AI-powered agent that uses natural language to automate key aspects of developers’ daily tasks. This agent will generate test cases, write and maintain automation tests, and significantly reduce the burden on developers, managers, and QA teams.ABOUT THE ROLE<ul><li>Driving end to end, design and implementation of features</li><li>Design, develop, and maintain integrations with multiple AI and cloud systems like Google Vertex AI, Azure, AWS and OpenAI</li><li>Build Gen AI based Agentic architecture for a first class AI enabled user experience</li><li>Use Prompt engineering techniques to leverage the best LLM models</li><li>Collaborate with product management, engineering teams and Machine learning engineers for requirements through to delivery</li><li>Design and implement scalable AI services</li></ul>ABOUT YOU <ul><li>6+ years of experience developing backend systems</li><li>5+ years of experience in Python with some knowledge of JavaScript (preferably Typescript)</li><li>Experience in RestAPIs, RPC, Deploying services</li><li>Experience in data modeling using NoSQL systems like MongoDB or SQL systems like MySQL, Postgres, etc.</li><li>Bachelor's degree, CS preferred, or equivalent professional experience</li><li>Experience working AWS to build scalable applications</li><li>Preference for candidates with experience in:</li><li>Building Code Generation products using LLMs</li><li>Knowledge of browser automation tools such as Puppeteer</li></ul>

Harness is a high-growth company that is disrupting the software delivery market. Our mission is to enable the 30 million software developers in the world to deliver code to their users reliably, efficiently, securely and quickly, increasing customers' pace of innovation while improving the developer experience. We offer solutions for every step of the software delivery lifecycle to build, test, secure, deploy and manage reliability, feature flags and cloud costs. The Harness Software Delivery Platform includes modules for CI, CD, Cloud Cost Management, Feature Flags, Service Reliability Management, Security Testing Orchestration, Chaos Engineering, Software Engineering Insights and continues to expand at an incredibly fast pace. Harness is led by technologist and entrepreneur Jyoti Bansal, who founded AppDynamics and sold it to Cisco for $3.7B. We're backed with $425M in venture financing from top-tier VC and strategic firms, including J.P. Morgan, Capital One Ventures, Citi Ventures, ServiceNow, Splunk Ventures, Norwest Venture Partners, Adage Capital Partners, Balyasny Asset Management, Gaingels, Harmonic Growth Partners, Menlo Ventures, IVP, Unusual Ventures, GV (formerly Google Ventures), Alkeon Capital, Battery Ventures, Sorenson Capital, Thomvest Ventures and Silicon Valley Bank. Position Summary This is an amazing opportunity to be an engineer in a high-growth, high-potential startup and to work on redefining the Continuous Integration (CI) space powered by AI/ ML. In this role, you will be responsible for architecting, designing, developing and delivering high quality software that has a direct impact on the company's product experience. The Harness Continuous Integration team is creating a modern cloud native, developer friendly and extensible CI platform. The CI team is an open and collaborative group of highly talented engineers who are welcoming and engaging About the role <ul><li>Design, develop, and maintain critical software in a fast-paced quality conscious environment</li><li>Author software functional specifications and design documents</li><li>Quickly understand complex systems/code and own key pieces of the system, including the delivered quality</li><li>Design and implementation of scalable algorithms</li><li>Diagnose and troubleshoot complex problems in a distributed computing environment</li><li>Perform peer reviews of specifications, designs, and code</li><li>Work alongside Site Reliability Engineers and cross functional teams to diagnose/troubleshoot any production performance related issues</li><li>We work in Java, Golang, and Python. Our systems are built on top of Docker, Kubenetes, MongoDB, TimescaleDB, GCP - Stackdriver, GCS, Cloud composer, AI Platform</li></ul> About you <ul><li>5+ years of experience in Java and/ or 3+ years of experience in Golang designing, developing, and debugging complex code</li><li>Strong background in data structures and algorithms</li><li>BS in CS or equivalent. Advanced degree is a plus</li><li>Experience in as many of the following areas</li><ul><li>Building containerized applications (K8S/ Docker)</li><li>Building applications in a Micro Services Architecture</li><li>Working with Networking and Security protocols (HTTPS, SSL, Certs)</li><li>Designing/developing REST, GRPC, and GraphQL APIs</li><li>Using MongoDB, including indexing and query optimization</li><li>Machine Learning, Statistics, Optimization and Data Minings.</li></ul></ul> Work Location Mountain View, CA - Hybrid (3x / week onsite) What you will have at Harness <ul><li>Competitive salary</li><li>Comprehensive healthcare benefits</li><li>Flexible Spending Account (FSA)</li><li>Flexible work schedule</li><li>Employee Assistance Program (EAP)</li><li>Flexible Time Off and Parental Leave</li><li>Monthly, quarterly, and annual social and team building events</li><li>Monthly internet reimbursement</li></ul> Pay transparency $150,000-$175,000 USD Harness in the news: <ul><li>Harness Grabs a $150m Line of Credit</li><li>Welcome Split!</li><li>Harness Recognized in Inc.'s Best Workplace Awards 2022</li><li>Harness on LinkedIn: America's Great Companies to Work ForAnd What You Can Learn From</li><li>#6 - Glassdoor Best Places to Work 2021 list</li><li>#17 on Forbes Top 50 Cloud Companies to Work For</li><li>#47 on LinkedIn' Top 50 Companies to Work For</li><li>#2 on Quartz 2021 list best places to work for remote workers</li><li>2021 Career Launching Companies List</li></ul> All qualified applicants will receive consideration for employment without regard to race, color, religion, sex or national origin.

Harness is a high-growth company that is disrupting the software delivery market. Our mission is to enable the 30 million software developers in the world to deliver code to their users reliably, efficiently, securely and quickly, increasing customers' pace of innovation while improving the developer experience. We offer solutions for every step of the software delivery lifecycle to build, test, secure, deploy and manage reliability, feature flags and cloud costs. The Harness Software Delivery Platform includes modules for CI, CD, Cloud Cost Management, Feature Flags, Service Reliability Management, Security Testing Orchestration, Chaos Engineering, Software Engineering Insights and continues to expand at an incredibly fast pace. Harness is led by technologist and entrepreneur Jyoti Bansal, who founded AppDynamics and sold it to Cisco for $3.7B. We're backed with $425M in venture financing from top-tier VC and strategic firms, including J.P. Morgan, Capital One Ventures, Citi Ventures, ServiceNow, Splunk Ventures, Norwest Venture Partners, Adage Capital Partners, Balyasny Asset Management, Gaingels, Harmonic Growth Partners, Menlo Ventures, IVP, Unusual Ventures, GV (formerly Google Ventures), Alkeon Capital, Battery Ventures, Sorenson Capital, Thomvest Ventures and Silicon Valley Bank. Position Summary This is an amazing opportunity to be an engineer in a high-growth, high-potential startup and to work on redefining the Continuous Delivery space powered by AI/ ML. In this role, you will be responsible for architecting, designing, developing, and delivering high-quality software that directly impacts the company's product experience. About the role <ul><li>Design, develop, and maintain critical software in a fast-paced quality conscious environment</li><li>Author software functional specifications and design documents</li><li>Quickly understand complex systems/code and own key pieces of the system, including the delivered quality</li><li>Design and implementation high scale, distributed systems</li><li>Diagnose and troubleshoot complex problems in a distributed computing environment</li><li>Perform peer reviews of specifications, designs, and code</li><li>Work alongside Site Reliability Engineers and cross-functional teams to diagnose/troubleshoot any production performance-related issues</li></ul> About you <ul><li>4+ years of Java experience designing, developing, and debugging complex code</li><li>Strong background in data structures and algorithms</li><li>BS in CS or equivalent. Advanced degree is a plus</li><li>Experience in as many of the following areas</li><li>Building containerized applications (Docker)</li><li>Building applications in a Micro Services Architecture</li><li>Working with Networking and Security protocols (HTTPS, SSL, Certs)</li><li>Designing/developing REST, GRPC</li><li>Using MongoDB, including indexing and query optimization</li><li>Working with platforms and tools like AppD, Stackdriver, GCP, Kubernetes, OpenShift</li><li>Knowledge of Go is a plus</li></ul> Work Location Mountain View, CA - Hybrid What you will have at Harness <ul><li>Competitive salary</li><li>Comprehensive healthcare benefits</li><li>Flexible Spending Account (FSA)</li><li>Flexible work schedule</li><li>Employee Assistance Program (EAP)</li><li>Flexible Time Off and Parental Leave</li><li>Monthly, quarterly, and annual social and team building events</li><li>Monthly internet reimbursement</li></ul> Pay transparency $165,000-$185,000 USD Harness in the news: <ul><li>Harness Grabs a $150m Line of Credit</li><li>Welcome Split!</li><li>Harness Recognized in Inc.'s Best Workplace Awards 2022</li><li>Harness on LinkedIn: America's Great Companies to Work ForAnd What You Can Learn From</li><li>#6 - Glassdoor Best Places to Work 2021 list</li><li>#17 on Forbes Top 50 Cloud Companies to Work For</li><li>#47 on LinkedIn' Top 50 Companies to Work For</li><li>#2 on Quartz 2021 list best places to work for remote workers</li><li>2021 Career Launching Companies List</li></ul> All qualified applicants will receive consideration for employment without regard to race, color, religion, sex or national origin.

Harness is a high-growth company that is disrupting the software delivery market. Our mission is to enable the 30 million software developers in the world to deliver code to their users reliably, efficiently, securely and quickly, increasing customers' pace of innovation while improving the developer experience. We offer solutions for every step of the software delivery lifecycle to build, test, secure, deploy and manage reliability, feature flags and cloud costs. The Harness Software Delivery Platform includes modules for CI, CD, Cloud Cost Management, Feature Flags, Service Reliability Management, Security Testing Orchestration, Chaos Engineering, Software Engineering Insights and continues to expand at an incredibly fast pace. Harness is led by technologist and entrepreneur Jyoti Bansal, who founded AppDynamics and sold it to Cisco for $3.7B. We're backed with $425M in venture financing from top-tier VC and strategic firms, including J.P. Morgan, Capital One Ventures, Citi Ventures, ServiceNow, Splunk Ventures, Norwest Venture Partners, Adage Capital Partners, Balyasny Asset Management, Gaingels, Harmonic Growth Partners, Menlo Ventures, IVP, Unusual Ventures, GV (formerly Google Ventures), Alkeon Capital, Battery Ventures, Sorenson Capital, Thomvest Ventures and Silicon Valley Bank. Position Summary Have you ever been overwhelmed with on-call duties and the constant deluge of alerts? Do you feel like you're spending more time dealing with production issues and operational toil than writing code and building new features? At Harness, we believe it's time to rethink incident response with the power of generative AI. As a Staff Engineer on the Incident Response team, you'll play a pivotal role in revolutionizing how engineers manage incidents. Our goal is to leverage AI to reduce alert fatigue, automate the correlation of changes with early warning signals, and streamline incident triage and resolution. By building proactive and intelligent incident response capabilities, we aim to reduce MTTR, improve SLAs, and empower engineering teams to focus on what matters most: building great software. About the role <ul><li>Extensive experience developing highly scalable, distributed applications, products and services in Java, Golang or similar languages </li><li>A desire to build products that solve complex technical problems for end users </li><li>Deep understanding of how distributed resilient software is built and deployed </li><li>Solid foundation in data structures, algorithms and software design with strong analytical and debugging skills </li><li>Comfort in working in short, agile, iterative development cycles </li><li>Strong desire to work in an unstructured, fast moving startup environment </li><li>Formal Computer Science education or equivalent experience </li></ul>About you <ul><li>Design, develop, and maintain critical software in a fast-paced quality conscious environment </li><li>Author software functional specifications and design documents </li><li>Quickly understand complex systems/code and own key pieces of the system, including the delivered quality </li><li>Design and implementation of scalable algorithms </li><li>Diagnose and troubleshoot complex problems in a distributed computing environment </li><li>Perform peer reviews of specifications, designs, and code </li><li>Work alongside Site Reliability Engineers and cross functional teams to diagnose/troubleshoot any production performance related issues </li><li>Environment is Java and related technologies. </li></ul>Work Location San Francisco, CA - Hybrid What you will have at Harness <ul> <li>Competitive salary </li><li>Comprehensive healthcare benefits </li><li>Flexible Spending Account (FSA) </li><li>Flexible work schedule </li><li>Employee Assistance Program (EAP) </li><li>Flexible Time Off and Parental Leave </li><li>Monthly, quarterly, and annual social and team building events </li><li>Monthly internet reimbursement </li></ul>Pay transparency $200,000-$215,000 USD Harness in the news: <ul> <li>Harness Grabs a $150m Line of Credit </li><li>Welcome Split! </li><li>Harness Recognized in Inc.'s Best Workplace Awards 2022 </li><li>Harness on LinkedIn: America's Great Companies to Work ForAnd What You Can Learn From </li><li>#6 - Glassdoor Best Places to Work 2021 list </li><li>#17 on Forbes Top 50 Cloud Companies to Work For </li><li>#47 on LinkedIn' Top 50 Companies to Work For </li><li>#2 on Quartz 2021 list best places to work for remote workers </li><li>2021 Career Launching Companies List </li></ul> All qualified applicants will receive consideration for employment without regard to race, color, religion, sex or national origin.

Harness is a high-growth company that is disrupting the software delivery market. Our mission is to enable the 30 million software developers in the world to deliver code to their users reliably, efficiently, securely and quickly, increasing customers' pace of innovation while improving the developer experience. We offer solutions for every step of the software delivery lifecycle to build, test, secure, deploy and manage reliability, feature flags and cloud costs. The Harness Software Delivery Platform includes modules for CI, CD, Cloud Cost Management, Feature Flags, Service Reliability Management, Security Testing Orchestration, Chaos Engineering, Software Engineering Insights and continues to expand at an incredibly fast pace. Harness is led by technologist and entrepreneur Jyoti Bansal, who founded AppDynamics and sold it to Cisco for $3.7B. We're backed with $425M in venture financing from top-tier VC and strategic firms, including J.P. Morgan, Capital One Ventures, Citi Ventures, ServiceNow, Splunk Ventures, Norwest Venture Partners, Adage Capital Partners, Balyasny Asset Management, Gaingels, Harmonic Growth Partners, Menlo Ventures, IVP, Unusual Ventures, GV (formerly Google Ventures), Alkeon Capital, Battery Ventures, Sorenson Capital, Thomvest Ventures and Silicon Valley Bank. Position Summary Harness Software Engineering Insights helps engineering leaders unlock metrics and insights to understand bottlenecks in their SLDC and drive efficiencies. It works by connecting to 40+ SDLC tools and correlates data from these different tools to surface insights and metrics. The central product experience asks users to authorize with their SDLC tools (JIRA, GitHub) using token authentication. It then ingests data from the cloud application and analyzes the data. The customer can then create different out of the box widgets to surface actional topical insights. The widget configuration allows the user to select filters, how they want to aggregate the data and how to customize the visualization This is an opportunity to join a high growth team at a high growth company. Join this group of software engineers on the bleeding edge of solving computer science problems. About the role <ul> <li>Design, develop, deploy and maintain critical software in a fast-paced quality conscious Java environment </li><li>Author software functional specifications and design documents for features developed. </li><li>Quickly understand complex systems/code and own key pieces of the system, including the delivered quality </li><li>Work in an agile environment, using iterative development cycles and a short customer feedback loop </li><li>Design and implementation of scalable backend software solutions </li><li>Diagnose and troubleshoot complex problems in a distributed computing environment. </li><li>Perform peer reviews of specifications, design, and code </li><li>Quickly understand complex systems/code and own key pieces of the system, including the delivered quality </li><li>Work alongside Site Reliability Engineers/DevOps and cross functional teams to deploy software or diagnose/troubleshoot any production related issues </li></ul>About you <ul> <li>7+ years of experience developing highly scalable, distributed applications, products, and backend services using Java </li><li>A desire to build products that solve complex technical problems for end users </li><li>Experience with relational databases like MySQL, PostgreSQL </li><li>Experience with SQL query tuning, performance optimizations is a plus </li><li>Experience with search frameworks like Elasticsearch, SOLR is a plus </li><li>Experience with applications hosted on AWS/Azure/GCP is a plus </li><li>Familiarity with Docker and CI/CD processes is a plus </li><li>Deep understanding of how distributed resilient software is built and deployed </li><li>Excellent problem solving and debugging skills </li><li>Experience working in short release cycles </li></ul>Work Location <ul><li>Mountain View, CA </li> </ul>The successful candidate will be asked to come into Harness' Mountain View, CA office 3 times per week. <ul> <li>What you will have at Harness </li><li>End-to-end ownership of your projects </li><li>Competitive salary </li><li>Comprehensive healthcare benefit </li><li>Paid Time Off and Parental Leave </li><li>Monthly, quarterly, and annual social and team-building events </li><li>Recharge & Reset Program </li><li>Monthly internet reimbursement </li></ul>Pay transparency $185,000-$195,000 USD Harness in the news: <ul> <li>Harness Grabs a $150m Line of Credit </li><li>Welcome Split! </li><li>Harness Recognized in Inc.'s Best Workplace Awards 2022 </li><li>Harness on LinkedIn: America's Great Companies to Work ForAnd What You Can Learn From </li><li>#6 - Glassdoor Best Places to Work 2021 list </li><li>#17 on Forbes Top 50 Cloud Companies to Work For </li><li>#47 on LinkedIn' Top 50 Companies to Work For </li><li>#2 on Quartz 2021 list best places to work for remote workers </li><li>2021 Career Launching Companies List </li></ul> All qualified applicants will receive consideration for employment without regard to race, color, religion, sex or national origin.

Harness is a high-growth company that is disrupting the software delivery market. Our mission is to enable the 30 million software developers in the world to deliver code to their users reliably, efficiently, securely and quickly, increasing customers' pace of innovation while improving the developer experience. We offer solutions for every step of the software delivery lifecycle to build, test, secure, deploy and manage reliability, feature flags and cloud costs. The Harness Software Delivery Platform includes modules for CI, CD, Cloud Cost Management, Feature Flags, Service Reliability Management, Security Testing Orchestration, Chaos Engineering, Software Engineering Insights and continues to expand at an incredibly fast pace. Harness is led by technologist and entrepreneur Jyoti Bansal, who founded AppDynamics and sold it to Cisco for $3.7B. We're backed with $425M in venture financing from top-tier VC and strategic firms, including J.P. Morgan, Capital One Ventures, Citi Ventures, ServiceNow, Splunk Ventures, Norwest Venture Partners, Adage Capital Partners, Balyasny Asset Management, Gaingels, Harmonic Growth Partners, Menlo Ventures, IVP, Unusual Ventures, GV (formerly Google Ventures), Alkeon Capital, Battery Ventures, Sorenson Capital, Thomvest Ventures and Silicon Valley Bank. Position Summary We are seeking a talented and experienced Data Platform Engineer to join our team as the Technical Lead. The ideal candidate will be responsible for designing, developing, and maintaining our data pipelines and infrastructure. They will work closely with cross-functional teams to understand data requirements, implement solutions, and ensure data quality and reliability. The data engineer will also be involved in optimizing data processes and supporting data analytics initiatives. About the role <ul><li>Design, build, and maintain scalable data pipelines and infrastructure to support data ingestion, processing, and storage. </li><li>Collaborate with data scientists, analysts, and other stakeholders to understand data requirements and develop solutions to meet business needs. </li><li>Implement data quality checks and ensure data integrity and reliability throughout the data lifecycle. </li><li>Optimize and tune data pipelines for performance and efficiency. </li><li>Troubleshoot and debug data-related issues, and provide timely resolution. </li><li>Stay updated with the latest technologies and best practices in data engineering and apply them to improve existing systems. </li><li>Document data architecture, processes, and workflows. </li><li>Provide support and guidance to junior members of the team. </li></ul>About you<ul><li>Bachelor's degree in Computer Science, Engineering, or related field. Master's degree preferred. </li><li>3+ yrs of proven experience as a data engineer or similar role, with a strong background in data warehousing, ETL/ELT processes, and data modeling. </li><li>Proficiency in programming languages such as Python, Java, or Scala. </li><li>Experience with big data technologies such as BigQuery, Spark, Kafka, DBT, SQLMesh etc. </li><li>Hands-on experience with cloud platforms such as AWS, Azure, or Google Cloud. </li><li>Strong SQL skills and experience working with relational and NoSQL databases. </li><li>Familiarity with data visualization tools such as Tableau, Power BI, or Looker. </li><li>Excellent problem-solving and analytical skills. </li><li>Strong communication and collaboration skills, with the ability to work effectively in a team environment. </li></ul>Preferred Experience <ul> <li>Experience with containerization and orchestration tools such as Docker and Kubernetes. </li><li>Knowledge of machine learning techniques and frameworks. </li><li>Experience with DevOps practices and tools for CI/CD. </li></ul>Work Location Mountain View, CA - Hybrid (3 days / week onsite) What you will have at Harness <ul> <li>Competitive salary </li><li>Comprehensive healthcare benefits </li><li>Flexible Spending Account (FSA) </li><li>Flexible work schedule </li><li>Employee Assistance Program (EAP) </li><li>Flexible Time Off and Parental Leave </li><li>Monthly, quarterly, and annual social and team building events </li><li>Monthly internet reimbursement </li></ul>Pay transparency $145,000-$185,000 USD Harness in the news: <ul> <li>Harness Grabs a $150m Line of Credit </li><li>Welcome Split! </li><li>Harness Recognized in Inc.'s Best Workplace Awards 2022 </li><li>Harness on LinkedIn: America's Great Companies to Work ForAnd What You Can Learn From </li><li>#6 - Glassdoor Best Places to Work 2021 list </li><li>#17 on Forbes Top 50 Cloud Companies to Work For </li><li>#47 on LinkedIn' Top 50 Companies to Work For </li><li>#2 on Quartz 2021 list best places to work for remote workers </li><li>2021 Career Launching Companies List </li></ul> All qualified applicants will receive consideration for employment without regard to race, color, religion, sex or national origin.

Harness Interview Questions

Harness Interview Guides

Harness Interview Questions

Harness Salaries by Position

Harness Opening Jobs