Software Engineer, SDK

Braintrust is hiring a Software Engineer, SDK to build and maintain open-source libraries for its AI evaluation and observability platform. The role owns the SDK lifecycle and focuses on integrations, developer experience, performance, release tooling, and community support.

Responsibilities:

• Build elegant, idiomatic, and resilient SDKs that power Braintrust’s LLM evaluation and AI observability platform
• Ensure our libraries are easy to use, efficient to run, and a delight to work with, prioritizing developer experience and performance
• Integrate with major AI providers, frameworks, and platforms our customers rely on, such as OpenAI, Anthropic, and Gemini
• Build tools and automation to improve testing, profiling and simplify release workflows
• Collaborate closely with backend, platform, and product teams to ensure a cohesive and polished developer experience
• 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

Requirements:

• Are customer-obsessed and passionate about solving real-world problems for developers
• Have deep expertise in either Javascript, Python, or Go, and understand what it takes to build fast, idiomatic, and reliable libraries in that ecosystem
• Are proficient with the tooling needed to build robust SDKs, such as testing frameworks, profilers, CI/CD pipelines, and packaging systems
• Care deeply about developer experience, from clean APIs and clear docs to thoughtful error handling and backward compatibility
• Know how to wrap, patch, or extend existing frameworks and SDKs to inject observability and control without breaking developer workflows
• Have experience maintaining or contributing to production-grade open-source libraries, ideally used across multiple environments
• 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