AI Platform Engineer, DevX
About Brain Co.
Brain Co. is an applied AI startup co-founded by Jared Kushner and Elad Gil, and backed by leading Silicon Valley builders including Patrick Collison and Andrej Karpathy. We are building AI applications for the world's most important institutions, delivering impact on real-world problems across governments, healthcare systems, and critical industries.
What You'll Work On
Join the DevX pod — the team that owns the build system, CI/CD, monorepo, and developer tooling that set the ceiling on how fast every other engineer at BrainCo can ship.
This is a force-multiplier role: your work compounds as we add teams, services, and customers.
Your job is to discover, measure, and remove developer friction.
Own the monorepo and build system
Own the architecture and ongoing health of our Nx-based monorepo: project graph, dependency boundaries, language toolchains (pnpm, uv, Go), and code generation patterns.
Make builds and tests fast, reliable, and incremental at scale.
Design and operate CI/CD
Build CI/CD systems with strong guarantees around correctness, reproducibility, and speed.
Own pipeline architecture, caching, parallelism, secret flow, and release engineering for environments that include regulated and air-gapped customer deployments.
Developer tooling and workflows
Design internal CLIs, scaffolding, local dev stacks (Tilt, Docker, Kubernetes), and code-quality infrastructure (lint, typecheck, format, pre-commit).
Own the developer-facing experience for deployment and environment workflows, while partnering with Infrastructure on the underlying cloud, Kubernetes, networking, and runtime substrate.
Create paved paths the team actually wants to use — not guardrails that get bypassed.
Treat developer tools as production systems
Run the build, CI, and dev infra with real SLOs, observability, and on-call rigor.
Internal downtime is downtime.
Solve ambiguous productivity problems
Move from "X is slow" to a measured, deployed improvement with clear before/after numbers.
Operate this like a real product
End-to-end ownership: architecture, implementation, rollout, observability, on-call, and iteration based on internal user feedback.
Drive adoption through quality, not mandates.
You Might Be a Great Fit If You...
We're looking for engineers who treat developer experience as a product — engineers who reach for users, not just specs.
Have 5+ years building developer-facing infrastructure: monorepo platforms, build systems, CI/CD, or internal tooling.
Have hands-on depth with at least one modern monorepo tool (Nx, Bazel, Pants, Buck, Turborepo) and the willingness to go deeper.
Have strong fluency with CI/CD systems at scale (GitHub Actions, Buildkite, CircleCI, or similar): matrix design, caching strategies, secret flow, parallelism.
Are fluent in at least two of: Go, Python, TypeScript, Rust, Bash.
Have shipped developer platforms that real engineers adopted.
Have measured developer friction and shown clear before / after impact from tooling, CI, build, release, or workflow improvements.
Have strong intuition for developer experience, paved paths, and long-term maintainability.
Are comfortable owning the full lifecycle: design doc, MVP, hardening, adoption.
Have owned developer-facing systems with real uptime and operational responsibility.
Are familiar with observability tooling and incident response.
Ways You Might Stand Out
Built or significantly contributed to a remote build cache, custom build system, or hermetic build pipeline (Bazel, Nix, etc.).
Led a polyrepo → monorepo (or reverse) migration at scale.
Experience applying DORA / SPACE or other DX metrics in practice.
Background in release engineering, supply-chain security (SLSA, Sigstore), or artifact management.
Experience building or maintaining a frontend platform or design system — shared component library, design tokens, Storybook / visual-regression infra, a11y or perf budgets across apps.
Open-source contributions to Nx plugins, GitHub Actions, or related developer tooling.
Exposure to multi-tenant, regulated, or air-gapped deployment environments.
Why This Role Matters
You'll set the ceiling on how fast every other engineer at BrainCo can ship. As we grow from a handful of teams to dozens — building AI systems for governments and regulated industries — the platform that lets us move quickly without breaking what matters becomes one of the highest-leverage systems in the company.
Benefits
Competitive salary plus equity
Medical, Dental, and Vision coverage
401(k)
Unlimited PTO
Daily lunches
Commuter benefits