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 ambitious startups and driven freelancers.
I don't just code. I come into 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
Remote only
Primarily works remotely
Experience
- Optum (UnitedHealth Group)Technical Lead ReactJS / React Native Web - Senior DeveloperBANKING AND INSURANCEMarch 2024 - Today (2 years and 3 months)Minneapolis, United StatesMission:Progressive migration of a legacy Ruby foundation to React / React Native Web in a critical banking context.Key Contributions:- Started a project with critical front-end performance challenges to implement optimizations.- Participated in architectural discussions within a page-by-page migration context.- Handled complex technical issues, particularly 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.- Evolutionary maintenance and continuous stabilization of the banking application.- Technical interface between product, design, and development teams.
- Optum (UnitedHealth Group)Technical Lead 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 credits and health insurance.Key Contributions:- Started a project already underway with high technical debt and a fragile architecture.- Analyzed the existing system, performed structural refactoring, and secured the codebase.- Handled critical technical issues, particularly payment solutions.- Defined and implemented development standards through documentation, code reviews, and technical workshops.- Implemented tools to improve quality and collaboration.- Contributed to the testing strategy and coached the team on best practices.- Served as a transverse technical referent within a team of approximately 12, mostly junior, developers.- Technical interface between product, design, and development teams.
- Richemont (via Xiomega Consulting)Technical Lead ReactJS / React NativeLUXURY GOODSDecember 2019 - Today (6 years and 6 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 referencing.- 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 good quality. Would do it again without a doubt.
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Education
- Degree in Computer Science, Telecom and Networks EngineeringTelecom Saint Etienne2014
Certifications
- Claude Certified Architect - FoundationsAnthropic Education2026
- Claude Certified Architect - Foundations Early AdopterAnthropic2026