Senior Engineer (Test Engine)

About Buildkite

At Buildkite, our mission is to unblock every developer on the planet. We’ve rethought how software delivery should work and have built a platform that is fast, reliable, secure, and able to scale to the needs of the most demanding high-growth tech companies globally including Airbnb, Shopify, Canva, PagerDuty, Lyft, and Pinterest.

Job Overview

In this role, you’ll help design, build, and scale tools that empower some of the world’s best software engineering teams. You’ll collaborate closely with engineers, designers, and product managers to deliver impactful features and improvements while working on challenges at the intersection of developer experience, scalability, and performance.

This is a highly collaborative, hands-on role where you’ll contribute to product development, influence architectural decisions, and help shape the future of Buildkite’s platform.

🔧 About the Team 

Test Engine helps to make test suites cheaper, faster and more reliable, reducing friction in developers' day to day work and making their working lives happier and more productive. We do this by identifying and quarantining flaky tests, providing tools to parallelise your suites to minimise build time, as well as showing trends over time of your suite and providing the ability to deep dive into what happens when an individual test executes.

🚀 What You’ll Do

• Work with engineering team to come up with new features or improvements that solve real problems for our customers
• Design and build features that balance speed and quality—shipped is better than perfect, but it still has to solve the problem
• Own and maintain key parts of the existing stack, ensuring it meets customer expectations while also evaluating and experimenting with new approaches and technologies to solve emerging challenges
• Communicate with customers to deeply understand their problems and making their problems your own, so you can design thoughtful solutions that really hit the mark
• Leveraging your own experience as a software engineer to make informed product and design decisions about our product
• Collaborate with the team to navigate complex problems, share knowledge across a broad range of technologies, and support each other to get the best solutions over the line

🎨What You Bring

• 3-5 years of experience in engineering
• Experience in designing, building, and delivering technology products within highly technical environments, such as developer tools
• Ability to deeply understand problems, evaluate potential solutions and trade-offs, and communicate insights effectively to deliver software that solves real problems for customers
• Comfortable synthesising customer problems, understanding the root issue that they’re facing, and using this understanding to drive product direction
• Strong communication skills, with a focus on empathy, emotional intelligence, and collaborative problem-solving
• Ability to work autonomously in a fast-paced, low-process environment where you’ll need to navigate ambiguity and drive impactful decisions

Key Technical Stacks

• Ruby on Rails
• React
• Turbo
• PostgreSQL
• Go 
• Clickhouse
• Kafka 
• Flink

✨ Why Join Buildkite

At Buildkite, we value kindness, autonomy, and collaboration. You’ll be part of a remote-first company where your work can make a meaningful impact – empowering engineers worldwide to build and deliver better software faster.

• Competitive compensation and benefits package
• Flexible, remote-first culture
• Opportunities for professional growth, leadership, and technical ownership
• Work alongside talented, passionate engineers building world-class developer tools
• A collaborative, inclusive, and innovative culture where your ideas make a real impact