Senior DevEx Engineer
Steward Replit's TypeScript monorepo, Go services, and developer tooling to accelerate engineering velocity and reduce friction. Partner with AI team to enhance agent-generated code, requiring senior-level expertise in build systems and large-scale codebases.
About the job
Responsibilities
- Maintain and evolve our codebase structure — a complex TypeScript monorepo, Go services, npm packages, and internal Agentic tooling.
- Own the build and test pipelines and optimize them to minimize build times and improve developer iteration speed.
- Drive code generation and type-safe interfaces across service boundaries (e.g., GraphQL, Protocol Buffers, gRPC, OpenAPI).
- Set the standards for code quality using automation tools such as TypeScript, ESLint, Prettier, and Go linters/formatters — building custom rules and plugins to enforce Replit-specific requirements.
- Streamline development setup and the onboarding experience.
- Work with platform teams to improve deployment processes, infrastructure integrations, and external tooling.
- Keep things fresh and modern in our codebase by adopting and leading migrations to better and faster tools.
- Partner with the AI team on our internal AI platform (which generates >60% of all merged PRs at Replit) to improve the Agent's output and shape strategy around its default stack.
- Help manage dependencies both internal (public and private) and external, including being the face of the company when interfacing with open-source libraries (e.g., sponsorships, upstream contributions).
Requirements
- Experienced software engineer (senior through staff) with a track record of improving developer productivity at scale.
- Strong proficiency in TypeScript and/or Go and/or Nix.
- Expertise in modern build systems and toolchains (e.g., Vite, webpack, esbuild, Go's build/module system).
- Proficiency with linters, formatters, testing frameworks, and code generation tools.
- Experience managing monorepos or large-scale codebases.
Nice to Haves
- Experience building self-service developer platforms (CI/CD, infra, or tooling) used by many engineering teams.
- Experience with AI-native development workflows — e.g., OpenCode, Claude Code, Cursor, custom agent skills.
- Open-source leadership or community contributions.
- Prior tech lead experience.
Skills
TypeScript, Go, Nix, Vite, webpack, Esbuild, GraphQL, Protocol Buffers, gRPC, Openapi, Eslint, Prettier, Monorepo, CI/CD
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