Adrien Rossignol

Owned the engineering roadmap and delivered production code across the React Native app and the Node.js backend. Built the first product version (React Native, Node.js, PostgreSQL) with early customer integrations starting three months after launch. Restructured the React Native codebase into feature modules to address technical debt, cutting crash reports by 85%. Worked closely with product managers and designers to turn customer problems into shipped features, releasing every Wednesday. Built CI/CD with GitHub Actions and Docker, reducing deploy time from +180s to -120s and achieving zero failed deployments. Set code-review rules and engineering standards as the team grew from 1 to 3. Instrumented key app metrics (shipping, watch crash-free rate, cold start) and fixed issues surfaced by those numbers.

Built and shipped a production React Native and Expo app for social worker benefits, from architecture to store release. Restructured the codebase into feature modules and created a shared component library reused across 18+ screens. Owned continuous integration processes and coordinated production releases to both the Apple App Store and Google Play. Refactored and optimized the application for performance, reliability, and long-term scalability.

Built and shipped a production mobile product for Sampdoria supporters covering authentication, onboarding, real-time news, rewards, quizzes, profiles, and notifications. Implemented Apple, Google, and email/password authentication plus Firebase real-time synchronization, analytics, and engagement features. Developed a supporting admin experience in Next.js and coordinated iOS and Android store delivery.