Senior Software Engineer - k6 Core

Responsibilities

• Build and maintain Grafana k6, an open-source performance testing tool written in Go.
• Develop features and improvements across the k6 codebase from idea through implementation and delivery.
• Work on scoped, under-specified problems by understanding context, evaluating trade-offs, and selecting pragmatic technical approaches.
• Collaborate with engineers on design, implementation, and code reviews.
• Deliver production-quality code, maintain existing functionality, and improve system reliability and maintainability.
• Contribute to k6 cloud services supporting distributed test execution across data centers.
• Consider performance, correctness, failure modes, architecture, releases, user-facing behavior, and open-source project health.
• Work asynchronously, documenting decisions in pull requests and concise design notes.

Requirements

• Strong experience building production software in Go, or another language with strong support for concurrency and parallelism.
• Experience working on larger or long-lived codebases.
• Ability to work independently on scoped problems and deliver them to completion.
• Clear technical communication skills, especially in code reviews and design discussions.
• Understanding of internet protocols including HTTP, gRPC, and WebSockets.
• Familiarity with lower-level networking concepts.
• Experience with modern development practices, including testing, code review, and iterative development.

Nice-to-Haves

• Contributions to or maintenance of open-source projects.
• Experience using k6 in production or contributing to the k6 project or ecosystem.
• Experience with performance, reliability, or network testing and optimization.
• Experience with distributed systems or cloud-based services.
• JavaScript and/or TypeScript experience.
• Experience building backend systems for web or mobile applications.
• Familiarity with Docker, AWS, microservices architectures, and observability tools such as Grafana or APM systems.

Compensation and Benefits

• United States base compensation range: $154445–$185334.
• Restricted Stock Units (RSUs) are included with all roles.
• 100% remote work environment.
• Career growth opportunities.
• Global annual leave policy of 30 days per year, including 3 Grafana Shutdown Days.
• In-person onboarding.