I design with Claude more than Figma now

Designer at Jane Street now uses Claude to build working prototypes instead of designing mockups in Figma.

Edwin, a designer at Jane Street, describes how Claude has replaced Figma and design documentation in his workflow. He now writes problem descriptions, uses Claude in his editor to build functional prototypes, iterates directly on working code, and shares results with users before submission. This approach eliminates intermediate work like spec docs and Figma components. Recent examples include a 2000+ line feature adding LLM prompting to JSQL input and several other user-facing prototypes. He notes this became viable after joining Jane Street, where unfamiliar technologies like OCaml and Bonsai initially seemed out of reach for technical contribution. The workflow reduces back-and-forth overhead compared to traditional design-engineering separation, though it raises questions about reviewer input and whether iteration in working code constrains creative thinking versus traditional mockup-based design.