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I'm a developer who specializes in React-Native, React and Next.js. With a Master’s in Engineering and hands-on experience as a Tech Lead, I build fast and polished cross-platform apps (mobile, web, and Smart TV). What sets me apart: - Proven Sector Expertise: Delivered mission-critical products in Healthcare (Sanofi, APHP), Fintech (Milleis Bank), Retail (Decathlon), and Media (FranceTV, MPG/Ligue1). - Product & User Focus: Trained in product-first engineering, I act as a technical partner who prioritizes user experience, fast time-to-market, and high-impact features over unnecessary technical complexity. - Multi-Platform Engineering: Specialized in building seamless user experiences across Web (Next.js), Mobile (Expo), and Smart TV, with deep expertise in universal applications. - AI-First Velocity: Combining AI-assisted workflows (Claude) with clean engineering to ship features faster without compromising code quality…I'm a developer who specializes in React-Native, React and Next.js. With a Master’s in Engineering and hands-on experience as a Tech Lead, I build fast and polished cross-platform apps (mobile, web, and Smart TV). What sets me apart: - Proven Sector Expertise: Delivered mission-critical products in Healthcare (Sanofi, APHP), Fintech (Milleis Bank), Retail (Decathlon), and Media (FranceTV, MPG/Ligue1). - Product & User Focus: Trained in product-first engineering, I act as a technical partner who prioritizes user experience, fast time-to-market, and high-impact features over unnecessary technical complexity. - Multi-Platform Engineering: Specialized in building seamless user experiences across Web (Next.js), Mobile (Expo), and Smart TV, with deep expertise in universal applications. - AI-First Velocity: Combining AI-assisted workflows (Claude) with clean engineering to ship features faster without compromising code quality

Remi Leroy

Web Developer, Software Engineer, Back-End Developer, +2

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I'm a developer who specializes in React-Native, React and Next.js. With a Master’s in Engineering and hands-on experience as a Tech Lead, I build fast and polished cross-platform apps (mobile, web, and Smart TV). What sets me apart: - Proven Sector Expertise: Delivered mission-critical products in Healthcare (Sanofi, APHP), Fintech (Milleis Bank), Retail (Decathlon), and Media (FranceTV, MPG/Ligue1). - Product & User Focus: Trained in product-first engineering, I act as a technical partner who prioritizes user experience, fast time-to-market, and high-impact features over unnecessary technical complexity. - Multi-Platform Engineering: Specialized in building seamless user experiences across Web (Next.js), Mobile (Expo), and Smart TV, with deep expertise in universal applications. - AI-First Velocity: Combining AI-assisted workflows (Claude) with clean engineering to ship features faster without compromising code quality…I'm a developer who specializes in React-Native, React and Next.js. With a Master’s in Engineering and hands-on experience as a Tech Lead, I build fast and polished cross-platform apps (mobile, web, and Smart TV). What sets me apart: - Proven Sector Expertise: Delivered mission-critical products in Healthcare (Sanofi, APHP), Fintech (Milleis Bank), Retail (Decathlon), and Media (FranceTV, MPG/Ligue1). - Product & User Focus: Trained in product-first engineering, I act as a technical partner who prioritizes user experience, fast time-to-market, and high-impact features over unnecessary technical complexity. - Multi-Platform Engineering: Specialized in building seamless user experiences across Web (Next.js), Mobile (Expo), and Smart TV, with deep expertise in universal applications. - AI-First Velocity: Combining AI-assisted workflows (Claude) with clean engineering to ship features faster without compromising code quality

Next availability:

October 26, 2026

Lausanne, Switzerland

I’m a developer who specializes in React-Native, React and Next.js. With a Master’s in Engineering and hands-on experience as a Tech Lead, I build fast and polished cross-platform apps (mobile, web, and Smart TV).

What sets me apart:

Proven Sector Expertise: Delivered mission-critical products in Healthcare (Sanofi, APHP), Fintech (Milleis Bank), Retail (Decathlon), and Media (FranceTV, MPG/Ligue1).
Product & User Focus: Trained in product-first engineering, I act as a technical partner who prioritizes user experience, fast time-to-market, and high-impact features over unnecessary technical complexity.
Multi-Platform Engineering: Specialized in building seamless user experiences across Web (Next.js), Mobile (Expo), and Smart TV, with deep expertise in universal applications.
AI-First Velocity: Combining AI-assisted workflows (Claude) with clean engineering to ship features faster without compromising code quality

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

French

Fluent

English

Advanced

Spanish; Castilian

Beginner

Japanese

Beginner

Work Experience

Tech Lead at Theodo Apps

September 1, 2025 - Present

Development of an Expo application for a private clinic in Ireland - Authentication - Error monitoring via Sentry - Use of FHIR APIs - Management of one developer Design of an Expo training for users creating apps with AI Revamp of a football app into a universal app using Expo - AI first development - Development of animations and graphics (Reanimated + Skia) - Improvement of cross-functional topics (web navigation, query management, etc.) - Management of a developer Integration of streaming player inside Ligue1 app and website - AI first development - Player optimization with Bitmovin and internal player

Software Engineer at Theodo Apps

May 1, 2023 - September 1, 2025

Development of a banking application in React Native for a French private bank - Development of transfer flows - Integration of Kobil for secure transactions - Implementation of security features (SSL pinning, masking of app content in the background) Creation of a TV application in React Native on Vega OS for a French media company - Development of features (authentication, themed pages, etc.) - Creation of the video player - Contribution to the spatial navigation library: react-tv-space-navigation - Assistance in improving the OS via the Amazon forum Creation of marketing websites in Next for a French pharmaceutical company - Development of a website generation system - 70% reduction in error logs in tests to improve their reliability and readability Creation of the ComPaRe EMA application - AI first development with Cline and Claude - Development of the React Native application - Participation in the development of a Nest backend and a React back office - Release of the application on the stores Participation in the development of the Kiprun website in React