About the role
Product Software Engineer
Build and ship the Windmill product end-to-end. The core challenge of building a developer platform: make it a delightful, intuitive experience while keeping the depth and power that developers expect. And increasingly, make Windmill the best place to author, run, observe, and debug AI-powered workflows and agents.
For example, Windmill parses your code to extract dependencies in Python/TypeScript, generates a lockfile, and extracts parameters from function signatures to auto-generate a UI, letting developers focus on the code that matters while handling all the boilerplate, with escape hatches for manual control. The same philosophy now extends to AI: turning an LLM call, a set of tools, a prompt, and a skill into a production-grade agent step should feel as natural as defining a function. All of that while being the fastest workflow engine on the market.
You'll work across the full stack, owning features from design to production:
- The editors. Build and refine Windmill's script editor, flow editor, app editor, raw app editor, and pipeline editor in Svelte / TypeScript. These are the heart of the product. Obsess over developer experience.
- AI inside the editors. The AI surface in Windmill is not a side panel. It is woven into how scripts get written, flows get built, apps get scaffolded, pipelines get debugged. You'll design and ship that integration: inline code generation, agent steps in flows, skill authoring, tool pickers, structured outputs, streaming responses, error recovery, trace inspection, evals you can actually look at and act on.
- Agentic systems. Work on Windmill's custom agentic loop (planning, tool use, retrieval, self-correction) and the UX wrapped around it. The agent loop and the interface around it are the same product.
- Backend integration. Wire frontend features to the Rust backend. APIs, real-time execution feedback, state management, SSE streaming, multipart, all the plumbing.
