About this role

Help build the public API as a product. Design, version, and evolve the API and SDKs that Stack AI customers build on, and keep the developer experience first-class.
Set our API standards. Help define the conventions, versioning and deprecation policy, and review bar that keep every API across the platform consistent and predictable.
Make agent runs observable. Build tracing and instrumentation that let anyone follow a single agent run end to end, across its models, tools, and sub-agents.
Turn usage into analytics customers act on. Build the reporting that shows customers how their agents perform, what they cost, and where to improve.
Own the audit trail. Build the audit logging and team-scoped views enterprises rely on.

4+ years building backend services and public APIs in production.
Strong API craft: RESTful design, SDK ergonomics, and rate limiting.
You speak fluent OpenAPI — experience defining API standards and governance: versioning, deprecation, and consistency across services.
Fluency with observability and analytics: distributed tracing, metrics, and turning raw signals into data products people rely on.
Strong in Python and modern backend frameworks (FastAPI or similar), comfortable across TypeScript/Node.js on the product surfaces.

Platform Engineer, APIs – Observability

Key skills