SDK Engineer (Open Source) - Developer Experience

Braintrust; United States; Remote; USD 140,000 - 200,000; Full time

Benefits offered by this job

Medical insurance

Daily meals

Flexible time off

Equity

Wifi stipend

Cell phone stipend

Job summary

Braintrust is hiring engineers to build open-source SDKs used to observe, understand, and optimize AI in production applications. You’ll own the full SDK lifecycle—design, implementation, release, docs, and community support—embedded in thousands of apps.

This role emphasizes developer experience, API craftsmanship, and delivering fast, reliable libraries across environments, frameworks, and AI providers. You’ll collaborate with backend, platform, and product teams to ensure a cohesive

Qualifications

• Deep expertise in JavaScript, Python, or Go and building fast, idiomatic libraries.
• Experience maintaining production-grade open-source libraries used across environments.
• Strong focus on developer experience, API design, and backward compatibility.

Responsibilities

• Build elegant, idiomatic SDKs powering evaluation and observability pipelines.
• Ensure libraries are easy to use and performant for customers.
• Integrate with major AI providers, frameworks, and platforms like OpenAI, Anthropic, Gemini.

Skills

JavaScript

Python

Go

Tools

Testing frameworks

Profilers

CI/CD pipelines

Packaging systems

Job description

Braintrust is hiring engineers to build open-source SDKs used to observe, understand, and optimize AI in production applications. You’ll own the full SDK lifecycle—design, implementation, release, docs, and community support—embedded in thousands of apps.

This role emphasizes developer experience, API craftsmanship, and delivering fast, reliable libraries across environments, frameworks, and AI providers. You’ll collaborate with backend, platform, and product teams to ensure a cohesive