Software Engineer, Developer Experience

About the CompanyBraintrust is the AI observability platform. By connecting evals and observability in one workflow, Braintrust 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 — turning production data into better AI with every release.About the RoleWe're looking for an Engineer who loves building tools for other engineers. You'll own the systems we touch every day — local dev, CI, and the deploy pipeline — and make shipping to production fast, safe, and reliable. The work compounds across every engineer at the company and is very important to our whole team.What You'll DoWork directly with the engineering team to find friction and remove it — help them be nimble, happy and productiveDrive CI runtime down: parallelization, caching, sharding, test selection, and killing flakesOwn the deploy pipeline: progressive rollouts, fast rollbacks, and clear signals when something is wrongOwn our build toolchain — bundlers, compilers, monorepo tooling — and keep cold builds and rebuilds fast as the codebase and architecture growsHarden our supply chain: SBOMs, signed artifacts, locked-down GitHub Actions, secret hygiene, and provenance for every buildBuild CLIs, GitHub Apps, and bots that make the right thing the easy thingIdeal Candidate Credentials5+ years building developer tools, CI/CD, or platform infrastructureA track record of taking slow, painful workflows and making them fast and pleasantDeep GitHub expertise: Actions, Apps, APIs, merge queues, and branch protectionsStrong fluency with JavaScript/TypeScript build and bundling tools (esbuild, swc, Vite, Turbopack, tsc, pnpm) and a clear sense of when to reach for whichComfortable profiling and optimizing across the stack — flamegraphs, tracing, and just plain measurementSupply chain security experience: SBOMs, Sigstore/cosign, SLSA, GitHub Actions hardeningStrong opinions on safe, reliable production deploysBenefits IncludeMedical, dental, and vision insuranceDaily lunch, snacks, and beveragesFlexible time offCompetitive salary and equityWifi & cellphone stipendEqual OpportunityBraintrust 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.