Open Source Engineer - Go

\u003ch2\u003eAbout the company\u003c/h2\u003e\u003cp style=\"min-height:1.5em\" Braintrust is building the modern platform for evaluating and deploying AI systems. Our mission is to help enterprises build trust in their AI by making it easy to test, monitor, and improve models using real-world evaluation frameworks. We work with cutting-edge customers in finance, healthcare, and tech who are building production-grade AI systems.\u003c/p\u003e\u003ch2\u003eAbout the Role\u003c/h2\u003e\u003cp style=\"min-height:1.5em\" We’re hiring engineers to build the open-source libraries that customers use to observe, understand, and optimize how AI operates inside their production applications. These SDKs are a critical part of Braintrust’s platform. They power evaluation and observability pipelines across a wide range of environments, frameworks, and AI providers.\u003c/p\u003e\u003cp style=\"min-height:1.5em\" This role is ideal for engineers who are passionate about developer experience, API craftsmanship, and building fast, reliable, and idiomatic libraries. You’ll own the full SDK lifecycle: design, implementation, release, documentation, and community support. Your work will be embedded in thousands of applications and help define how AI is adopted and operationalized across industries.\u003c/p\u003e\u003ch2\u003eWhat You’ll Do\u003c/h2\u003e\u003cul style=\"min-height:1.5em\"\u003cli\u003e\u003cp style=\"min-height:1.5em\"Build elegant, idiomatic, and resilient SDKs that power Braintrust’s LLM evaluation and AI observability platform.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Ensure our libraries are easy to use, efficient to run, and a delight to work with, prioritizing developer experience and performance.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Integrate with major AI providers, frameworks, and platforms our customers rely on, such as OpenAI, Anthropic, and Gemini.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Build tools and automation to improve testing, profiling and simplify release workflows.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Collaborate closely with backend, platform, and product teams to ensure a cohesive and polished developer experience.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Be a great community ambassador: talk with our users, understand their issues, help them get their fixes merged and have deep empathy for our users.\u003c/p\u003e\u003c/li\u003e\u003c/ul\u003e\u003ch2\u003eYou Might Be a Fit If You:\u003c/h2\u003e\u003cul style=\"min-height:1.5em\"\u003cli\u003e\u003cp style=\"min-height:1.5em\"Are customer-obsessed and passionate about solving real-world problems for developers.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Have deep expertise in Go and understand what it takes to build fast, idiomatic, and reliable libraries in that ecosystem.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Are proficient with the tooling needed to build robust SDKs, such as testing frameworks, profilers, CI/CD pipelines, and packaging systems.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Care deeply about developer experience, from clean APIs and clear docs to thoughtful error handling and backward compatibility.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Know how to wrap, patch, or extend existing frameworks and SDKs to inject observability and control without breaking developer workflows.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Have experience maintaining or contributing to production-grade open-source libraries, ideally used across multiple environments.\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"\u003cstrong\u003eBonus:\u003c/strong\u003e You’ve contributed to popular open source projects, led SDK adoption at your organization, are familiar with tracing and observability tools like OpenTelemetry, or worked on tools in the LLM/AI ecosystem.\u003c/p\u003e\u003c/li\u003e\u003c/ul\u003e\u003ch2\u003eBenefits include\u003c/h2\u003e\u003cul style=\"min-height:1.5em\"\u003cli\u003e\u003cp style=\"min-height:1.5em\"Medical, dental, and vision insurance\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"401k plan\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Daily lunch, snacks, and beverages\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Flexible time off\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"Competitive salary and equity\u003c/p\u003e\u003c/li\u003e\u003cli\u003e\u003cp style=\"min-height:1.5em\"AI Stipend \u003c/p\u003e\u003c/li\u003e\u003c/ul\u003e\u003ch2\u003eEqual opportunity\u003c/h2\u003e\u003cp style=\"min-height:1.5em\"Braintrust is an equal opportunity employer. All applicants will be considered for employment without attention to race, color, religion, sex, sexual orientation, gender identity, national origin, veteran or disability status.\u003c/p\u003e