Senior Software Engineer - k6 Core | United Kingdom | Remote

ABOUT THE ROLE The Senior Software Engineer - k6 Core will play a crucial role in building and maintaining k6, a performance testing tool written in Go. As part of the Grafana Labs team, you will work on features and improvements across the k6 codebase, collaborating closely with other engineers on design, implementation, and code reviews. WHAT YOU'LL DO You will be responsible for working on features and improvements across the k6 codebase, from initial idea through implementation and delivery. This will involve problems that are not fully specified up front and require understanding the context, evaluating trade-offs, and choosing a reasonable technical approach. Your work will have a direct and visible impact on the product and its users. You will also have the opportunity to work on the k6 cloud offering, which builds on top of k6 to run distributed tests across data centers worldwide. This includes Go services that support distributed execution and require careful attention to performance, correctness, and failure modes. In addition, you will be able to leverage modern AI coding assistants as part of your daily workflow, backed by a company-funded usage budget. You will also have access to the latest frontier models from OpenAI, Anthropic, and Google. WHAT YOU'LL NEED To be successful in this role, you should have strong experience building production software in Go, or another language with good support for concurrency and parallelism. You should also have experience working on larger or long-lived codebases, the ability to work independently on scoped problems and deliver them to completion, and clear technical communication skills. You should have a good understanding of internet protocols such as HTTP, gRPC, and WebSockets, with some familiarity with lower-level networking concepts. Experience with modern development practices, including testing, code review, and iterative development, is also essential. WHY REMOTE Grafana Labs is a 100% remote company with 1,600+ team members across 40+ countries. As a remote employee, you will have the flexibility to work from anywhere and be part of a global collaborative culture. BENEFITS As a Senior Software Engineer - k6 Core, you will be eligible for a competitive salary and benefits package, including health insurance, parental leave, and education stipend. You will also have access to modern AI coding assistants, a company-funded usage budget, and the latest frontier models from OpenAI, Anthropic, and Google.