Senior Software Engineer - k6 Core | Canada, EST only | Remote

About the Role

At k6, we build reliability and performance testing tools for developers and QA engineers. k6 is an open-source project focused on making performance testing practical, approachable, and useful in real-world engineering workflows. We care deeply about developer experience, correctness, and scalability. k6 is part of the Grafana ecosystem and is used by engineers to test and understand systems under real load.

What You'll Be Doing

• Join a team of engineers responsible for building and maintaining k6, a performance testing tool written in Go.
• Work on features and improvements across the k6 codebase, from initial idea through implementation and delivery.
• Tackle problems that are not fully specified up front and require understanding context, evaluating trade-offs, and choosing a reasonable technical approach.
• Work with a high degree of independence while collaborating closely with other engineers on design, implementation, and code reviews.
• Deliver production-quality code, maintain existing functionality, and help keep the system reliable and maintainable over time.
• Some work may involve the k6 cloud offering, including Go services that support distributed execution and require careful attention to performance, correctness, and failure modes.
• Because the team is small, your work will have a direct and visible impact on the product and its users.
• We invest heavily in developer productivity and support the use of modern AI coding assistants as part of your daily workflow.