Location: San Francisco / On-site Experience: 28 years Stage: Seed Series B Compensation: $150k to $300k Role type: Full-time This role is for a client of Weekday Why This Role Exists Youll help build the core product from the ground up. This is a hands-on role for someone who loves shipping, thrives in ambiguity, and wants ownership over major product surfaces at an early-stage company. What Youll Do Build end-to-end product features across frontend and backend Ship quickly in 01 environments Design APIs, schemas, and workflows Partner closely with founders, product, and design Improve reliability, performance, and developer experience Establish engineering best practices Use modern AI developer tools to move faster (LLM copilots, agent workflows, testing automation) Requirements What Were Looking For Strong TypeScript, React, and Node.js Experience shipping production web products Startup or founding-engineer background (or equivalent) Product-minded builder with high ownership Comf...