Open Source Engineer - Go
Posted 413 days ago, which is unusual. The employer's own board was still carrying it when we last read it, 2 hours ago.
This is the employer's own posting, not a copy on a job board.
What we know
Is it still open?
Confirmed still open
Last checked 11h ago — checked against the employer's own applicant tracking system, which is the company answering directly.
We re-read the employer's own applicant tracking system and the posting was still there. That is the company answering directly.
How old is it?
Posted 413d ago
The date the source published, not the day we noticed it (2025-07-28). Last seen at its source 2h ago.
Is it remote?
Remote
That is the location the employer filed this posting under. Quoted as written — we do not re-word the source's own location.
Who may apply?
New York City, Seattle
The description states no restriction of its own. This is the source's own tag.
Pay not stated
Similar roles pay $159k–225k/yr
Middle 50% of 2161 listings that do state pay — Engineering · all levels · United States · USD/year. This employer has published no salary; this is what comparable listings we hold disclose, never converted between currencies or periods. How this is calculated.
Skills named in the ad
Recognised terms only, from a fixed vocabulary — this is what CV matching compares against.
Carried by 1 source
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ashby employer's own board first seen 11d ago · last seen 2h ago
The listing
About the company
Braintrust is the agent observability platform. By actively applying intelligence to agent traces and automatically surfacing the most critical patterns, Braintrust gives teams the visibility to understand how agents behave in production and the tools to improve them.
Teams at Notion, Stripe, Box, OpenAI, and Cloudflare use Braintrust to trace their agents, find the issues in their observability data, and run evals that tell them how to improve.
About the Role
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.
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.
What You’ll Do
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.
You Might Be a Fit If You:
Are customer-obsessed and passionate about solving real-world problems for developers.
Have deep expertise in 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.
Bonus: 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.
Benefits include
Medical, dental, and vision insurance
Daily lunch, snacks, and beverages
Flexible time off
Competitive salary and equity
Wifi & cellphone stipend
Equal opportunity
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.