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Flavien DelhommeFD

Flavien Delhomme

Supermalter

Web / Mobile Developer - React / React Native

€550/day
23 projects
Paris, FR
3-7 years

Average response time: 4 hours

Freelancer profile translated to English.
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About Flavien

Hello đź‘‹,

Senior React Native Developer, I build reliable and performant mobile applications that meet your business challenges.

Do you have an ambitious project? My main experience: 3 years on a real-time application used by 7k people every day, making 1M calls per month. I know what it means to build a product that must work, without compromise.

An engineer by training and a former auditor, I bring rigor and strategic vision to every project. I don't just code: I understand your goals, anticipate risks, and build long-term maintainable solutions.

My areas of intervention:
• Development of React Native mobile applications from A to Z
• Development of React web applications from A to Z
• Possibility of developing the associated back-end
• Performance audit and optimization of existing applications
• Taking over and structuring complex technical projects
• Integration of AI and process automation (OpenAI API, N8N...)

Ready to discuss your project? Contact me so we can evaluate your needs together.

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Keywords: Product Engineering, Software Engineer, Web, Mobile, React, React Native, TypeScript, AI & Automation, Performance & Scalability, Software Architecture, Audit, Product Strategy, Startup, Entrepreneur.

  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Basic

Can work on-site
Paris (up to 50km)

Experience

  • Ringover France
    Lead Tech / Developer
    TELECOMMUNICATIONS
    November 2022 - Today (3 years and 7 months)
    Paris, France
    • Total re-development of the main telephony iOS and Android applications in React Native: creation of a team of 5 people, creation of processes, cost optimization, standardization of mobile skills, integration with QAs, designers.
    • Transformation into a reliable B2B product (1M calls made per month)
    • Successful bet on increased customer satisfaction (+2 stars on the stores)
    React Native iOS Android Management d'équipe Application Mobile
  • Neurowaste
    Performance improvement
    ENVIRONMENTAL
    March 2024 - March 2024
    Paris, France
    • Performance diagnosis suite in response to critical slowdowns on low-grade Android devices.
    • In-depth analysis (re-renders, RAM management) and proposal of a clear roadmap for client-side implementation autonomy.
    • Implementation of the most impactful areas: use of Hermes as JS engine, update of React Native and packages/dependencies, refactoring for optimization of costly re-renders.

    React Native Performance Application Mobile Android Adaptabilité et réactivité
  • ConseilCE / MyPrimo
    Product Engineer / Developer
    ENTERTAINMENT AND LEISURE
    December 2023 - February 2024 (2 months)
    Paris, France
    • Creation of the company's first iOS and Android application. Introduction of a mobile culture within the teams.
    • Co-creation of the UX with the client, respecting user habits for this type of product.
    • Client's choice to build the application around a WebView: managing integration complexities for a near-native user experience and app store acceptance.

    Product management iOS Android Application Mobile React Native

Reviews

4.9

Out of 5 ratings

S

Sophien

Ringover

Several months project

-

Reviewed on 4/22/2025

We have been collaborating with Flavien for several months, and I highly recommend him. Flavien stands out for his great mastery of his subject, whether it be the technical specifics of mobile or broader product challenges. He is a curious developer, always keeping up-to-date, who seeks to deeply understand problems to propose relevant, robust, and well-thought-out solutions. Very organized and proactive, he anticipates needs, adapts quickly to changes, and communicates clearly. His attention to detail, his demand for quality, and his ability to collaborate effectively with other teams make him a key element of any project.
S

Sophien

Ringover

Reviewed on 4/1/2025

I had the pleasure of working with Flavien on our application, and I recommend him without hesitation. He is an extremely professional, rigorous, and well-organized developer. He demonstrates great proactivity, anticipates needs, asks the right questions, and provides concrete and relevant solutions. His attention to detail, in both user experience and code quality, is remarkable. Flavien is also an excellent communicator: he knows how to collaborate effectively with product, design, and QA teams, while maintaining a constructive attitude focused on impact. He is a real asset to a tech team, capable of delivering with reliability and high standards.

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Education

  • DiplĂ´me d'ingĂ©nieur, IngĂ©nierie
    Centrale Lille
    2018
    Diplôme d'ingénieur, Ingénierie
  • Classe PrĂ©paratoire aux Grandes Ecoles
    Lycée Champollion
    2015
    Classe Préparatoire aux Grandes Ecoles

Skill set

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