Freelancer profile translated to English.
Back to original languageAbout Cyril
Lead React and React Native Developer with over 10 years of experience on critical projects for international groups: banking platforms (Optum Bank), digital health (UnitedHealth Group), luxury e-commerce (Richemont, Hermès), as well as for bold startups and ambitious independents.
I don't just code. I arrive on complex projects to structure the front-end architecture, define quality standards, industrialize CI/CD, and onboard technical teams for the long term. From component to deployment.
What sets me apart: a cross-functional vision from front → back → cloud → UX/UI, an ability to make quick technical decisions under pressure, results-oriented leadership, and AI-enhanced productivity across the entire development cycle.
What I bring to a project:
💡 Precise understanding of your needs and specifications
⚙️ Implementation of robust web and mobile architectures
📱 Design and development of mobile applications with React Native
🖥 Creation of interactive and high-performance websites with React.js / Next.js
🔗 Industrialization of your CI/CD and improvement of your delivery process
🚀 Integration of AI into team workflows
Do you have a demanding project? Let's talk.
Together, let's bring your ideas to life and build a successful digital future! 🚀
English
Fluent
French
Native or bilingual
Can work on-site
Lyon (up to 10km)
Experience
- Optum (UnitedHealth Group)Technical Referent ReactJS / React Native Web - Senior DeveloperBANKING AND INSURANCEMarch 2024 - Today (2 years and 5 months)Minneapolis, United StatesMission:Progressive migration of a legacy Ruby foundation to React / React Native Web in a critical banking contextKey Contributions:- Started a project with critical front-end performance issues to provide optimizations- Participated in architecture discussions in a page-by-page migration context- Handled complex technical issues, including payment flow integration- Defined React development standards in a historically Ruby-oriented environment- Applied standards within the offshore team- Provided React / React Native Web expertise and served as a referent in a predominantly junior team- Evolving maintenance and continuous stabilization of the banking application- Technical interface between product, design, and development teams
- Optum (UnitedHealth Group)Technical Referent ReactJS / React Native Web - Senior DeveloperMEDICALSeptember 2023 - March 2024 (6 months)Minneapolis, United StatesMission:Overhaul of a medical e-commerce platform for the use of mutual credit and complementary health insurance.Key Contributions:- Started a project already underway with high technical debt and a fragile architecture- Analysis of the existing system, structural refactoring, and securing the codebase- Handled critical technical issues, particularly payment solutions- Definition and application of development standards through documentation, code reviews, and technical workshops- Implementation of tools to improve quality and collaboration- Contribution to the testing strategy and team coaching on best practices- Transversal technical referent role within a team of approximately 12 predominantly junior developers- Technical interface between product, design, and development teams
- Richemont (via Xiomega Consulting)Lead Technical ReactJS / React NativeLUXURY GOODSDecember 2019 - Today (6 years and 8 months)Lyon, FranceDigital platform for searching and securing stolen luxury goods (watches and jewelry)- Responded to the call for tenders for the entire application part- Supported the client and technical teams- Designed and implemented the technical architecture to combine the mobile application and the website with a single codebase using React Native and ReactJS frameworks- Developed the mobile application and the website- Implemented continuous integration and industrialized delivery processes- Specified requirements and proposed mockups in line with web usage- Optimized website SEO- Responsible for project quality through code reviews, implementation of analysis tools, and setting up all tests- Maintained the solution on AWS
Reviews
E
Emilien
Teazit
Reviewed on 11/4/2020
Always a pleasure to work with Cyril! Professional, attentive, efficient.
Romain
360 medical
Reviewed on 2/5/2019
It's a pleasure to work with Cyril, and the developments are of very high quality. Would do it again without a doubt.
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Education
- Computer Engineering, Telecom and Networks DegreeTelecom Saint Etienne2014
Certifications
- Claude Certified Architect - FoundationsAnthropic Education2026
- Claude Certified Architect - Foundations Early AdopterAnthropic2026