Open Source Engineer - Go

Stack

Responsibilities

• ▹Build elegant, idiomatic, and resilient SDKs that power Braintrust's LLM evaluation and AI observability platform
• ▹Integrate with major AI providers and frameworks such as OpenAI, Anthropic, and Gemini
• ▹Build tools and automation to improve testing, profiling, and release workflows
• ▹Collaborate closely with backend, platform, and product teams for a cohesive developer experience
• ▹Be an active community ambassador: engage with users and help merge their fixes

Requirements

• ▹Deep expertise in Go, with a strong sense of what it takes to build fast, idiomatic, reliable libraries
• ▹Proficiency with SDK tooling: testing frameworks, profilers, CI/CD pipelines, packaging systems
• ▹Deep care for developer experience: clean APIs, clear docs, thoughtful error handling, backward compatibility
• ▹Experience wrapping, patching, or extending frameworks to add observability without breaking workflows
• ▹Experience maintaining or contributing to production-grade open-source libraries

Nice to have

• ▹Contributions to popular open-source projects
• ▹Led SDK adoption at your organization
• ▹Familiarity with tracing/observability tools like OpenTelemetry
• ▹Experience in the LLM/AI ecosystem

Soft skills

What we offer

• ▹Medical, dental, and vision insurance
• ▹Daily lunch, snacks, and beverages
• ▹Flexible time off
• ▹Competitive salary and equity
• ▹Wifi & cellphone stipend

About the company

Braintrust is the AI observability platform. By connecting evals and observability in one workflow, it gives builders the visibility to understand how AI behaves in production and the tools to improve it. Teams at Notion, Stripe, and Vercel use Braintrust to compare models, test prompts, and catch regressions.