Build and maintain SDKs plus compiler and generator infrastructure to improve how developers ship features across languages.

Drive feature parity across SDKs, including advanced capabilities such as auto-pagination and server-sent events
Expand SDK coverage into additional languages by building and evolving new generators (examples include Swift, Rust, Terraform)
Contribute to multiple codebases using TypeScript, Go, and Python
Collaborate with leadership on team growth through recruiting and mentorship
Set the standard for language-specific SDK quality, focusing on idiomatic, easy to use, and reliable APIs
Own core components of the open-source compiler to add features and improve developer experience
Stay current on language-specific tools and libraries, and engage directly with developers via GitHub and community forums
Help scale hiring and mentorship as the team expands

4–10 years of professional software engineering experience
Deep expertise in one of the following languages (specialist track): Java, PHP, Python, TypeScript, or Ruby
Broad technical fluency to contribute across multiple languages (generalist track)
Experience in fast-paced startup environments; founder experience is a plus
Strong product thinking and empathy for developer experience
Eagerness to work in a polyglot environment

SDK and platform tooling: Fern, Express, FastAPI, Algolia, turbopuffer
Front end: Next.js, Vercel
LLM components: Claude, Bedrock
Backend and services: Microservices (Express for Node.js, FastAPI for Python)
Datastores: Postgres, Prisma ORM
Cloud: AWS
Languages referenced: Java, PHP, Python, TypeScript, Ruby, Swift, Rust, Terraform, Go
Collaboration: GitHub

Salary: $170,000–$200,000 for Generalists; $200,000–$230,000 for Language Specialists
Equity: 0.1%–0.3%
Living bonus: $18,000 annually for candidates living near the office
Visa sponsorship: Not currently offered (may consider exceptional candidates)
Meals: Breakfast, lunch, and dinner provided at the office
Insurance: Health, dental, and vision
Time off: Unlimited vacation

Software Engineer, SDK

Job Description