PaceAI

I architected and built end-to-end a SaaS PWA for runners: a Java 21/Spring Boot 3.4.5 backend, a Next.js 14/React 18 (PWA) frontend, authentication with Spring Security, JWT and Google OAuth2, payment integrations (Mercado Pago, Stripe), and AI features powered by Spring AI. Persistence runs on PostgreSQL with Flyway migrations and Redis caching, deployed to production on Azure with Key Vault for secrets. The project follows its own architectural patterns — communication via Next.js rewrites and business logic isolated in Services — and Claude Code is part of the entire development cycle, with custom skills and technical sprints.