Rockstar Product-Minded Full-Stack SaaS Engineer

We are looking for a senior full-stack engineer to build a production-grade, multi-tenant B2B SaaS platform. The product helps business owners understand their performance, identify risks and make better decisions across four industries: restaurants, real estate development, construction and events. The project is already extensively documented. A very comprehensive PRD covers the product requirements, business rules, user journeys and acceptance criteria. Detailed UX/UI mockups are currently being finalized and will be ready before development begins. This is a complete frontend and backend build. We need someone who: - Understands the product intent, not just the technical task - Identifies ambiguities before coding - Takes full ownership of implementation, testing and verification - Tests normal, edge, degraded and unauthorized cases - Delivers working software with reproducible evidence - Does not rely on the client to discover defects Expected stack: - TypeScript, Next.js and React - PostgreSQL / Supabase, Auth, Storage and RLS - Stripe Billing and webhooks - Vitest/Jest and Playwright - CI/CD and staging environments - Claude Code or comparable AI coding tools AI-assisted development is expected, but you remain fully responsible for every generated line of code and for proving that the result works correctly. Please include the keyword QUALITY2026 at the beginning of your application. Applications without this keyword will not be reviewed. We will evaluate product understanding, testing strategy, security, code quality and delivery evidence. Then include: - One relevant production SaaS project - Your exact responsibilities on that project