Guillaume Lung

– Co-responsible for services, including a Next.js website with a Ruby on Rails backend. – Optimized the customer journey to boost conversion, developed a design system, monitored and improved search functionality within the directory. – Significant autonomy and initiative to improve the company's KPIs.

– Electric bike subscription service (multiple European cities, founded by SoundCloud's former CTO). – Built core product from the ground up with a team of 10. – Co-Owned Android app development and contributed to the Node/GraphQL backend. – Established the team's testing infrastructure to create and manage test assets, enabling faster release cycles and end-to-end testing.

– Seven years across Android, backend, and web at one of the largest audio platforms (175M monthly users). – Built offline-first features and user collection sync for the Android app, including backend implementation. – Created and maintained lightcycle, an open-source Android library. – Co-owned the "activities" microservices (likes, follows, reposts) — monitored production, responded to incidents. – Later contributed to creator-facing services. – Also prototyped a live concert experience during the pandemic, spanning web, Android, and backend.

– Managing the teams responsible for mobile development (iOS/Android/Backend For Frontend). – Recruited and formed 4 teams with an emphasis on product-development and using AGILE methodology (kanban/scrum). – Created and shipped "ViaMichelin GPS, Maps, Traffic" and "The MICHELIN Guide”.

– Contributing to the B2B MICHELIN web apps, and JavaScript API.

– Contributing to the middleware and applications embedded on set-top-boxes. – Implemented the Mediavision subscription API and created from scratch an Electronic Program Guide application.