Senior Software Engineer, Core API - Weights & Biases

You will be responsible for building and evolving the core backend systems and shared infrastructure that power our platform. A significant portion of backend logic is shared across services, and this role will help define, maintain, and scale that foundation. You will own and improve internal schema and code generation tooling that ensures consistency and correctness across services. You will work on and extend our custom job scheduler, improving reliability, observability, and execution for a.

5+ years of backend engineering experience building and operating production systems. Proven experience designing and maintaining distributed systems at scale. Hands-on experience designing and evolving APIs (REST, GraphQL, and/or gRPC). Strong proficiency in Go, Python, or a comparable backend systems language. Experience implementing concurrency and parallelism patterns in production systems. Demonstrated ownership of shared infrastructure, internal platforms, or developer tooling used by