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David GuerinDG

David Guerin

Tech Lead Front-End: React Native & React & AI

€450/day
5 projects
Paris, FR
8-15 years

Average response time: 1 hour

Freelancer profile translated to English.
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About David

I am a software engineer with over 8 years of experience. I have worked on high-traffic websites, as well as withSaaS startupswith over a million active web/mobile users.

My latest clients:

-Mistral AI[Expo, tRPC]
-Detective Box[Vite, Tailwind]
-TRAINSWEATEAT(> 1.3M users) [React Native, React, Node.js, TS]
-Marché de Rungis(With Sooyoos agency, high-traffic site) [Next.js, Node.js, TS]

I am highly proficient with these technologies (> 5 years of experience):
- React Native / Expo
- Native module creation with Nitro Modules
- React
- Next.js
- Node.js / Bun
- Typescript
- tRPC
- GraphQL
- MongoDB
- RTK Query

I am experienced with React Native and React. I can manage the creation and delivery of new features alone or in a team. I am used to working in an agile environment.

I can build full-stack projects from scratch or provide on-site support for your project.
  • English

    Fluent

  • Portuguese

    Fluent

  • French

    Native or bilingual

  • Spanish

    Basic

Remote only
Primarily works remotely

Experience

  • Mistral AI
    Mobile Developer Expo
    TECH
    January 2025 - March 2025 (2 months)
    Paris, France
    I helped Mistral AI deploy the first version of the mobile Chat. I joined the mobile team for reinforcement (Agile environment with Daily, Linear, etc.).

    I was responsible for developing new features and fixing issues reported by the QA team.

    Very positive experience that allowed me to learn many best practices and work with very talented colleagues.
    Expo iOS tRPC React Query
  • Détective box
    Web Developer and Mockup Integration
    SOFTWARE PUBLISHING
    October 2024 - February 2025 (4 months)
    Paris, France
    I was on-site reinforcement for the team to develop new features, fix bugs, and address other issues reported by the QA team and users.
    Vite React.js TailwindCSS
  • Koin
    Web Developer and Mockup Integration
    SOFTWARE PUBLISHING
    May 2024 - September 2024 (4 months)
    Toulouse, France
    Worked in an agile environment, providing reinforcement to a development team for mockup integration and new feature development.
    Vite RTK Query React.js css modules Koin

Reviews

4.7

Out of 3 ratings

MichaelM

Michael

Kotzilla

Reviewed on 5/15/2024

A successful first collaboration with David, who quickly adapted to the team and the project. We would collaborate again if needed, with confidence.
K

K

Reeflect

Reviewed on 1/16/2024

I recommend. David knows React-Native, Expo, and all the Android and iOS development/build processes well. Additionally, he helped us implement WebRTC in our app.

Recommendations

Mathias LachotML
Amine B.AB
Mathias Lachot and 1 other person have recommended David

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Education

  • Master of Secure Embedded and Mobile Systems
    CNAM Paris
    2018
    Une formation de deux ans visant à former les personnes aux différents aspects des systèmes embarqués, allant de la conception de systèmes jusqu'au développement embarqué bas niveau pour les microprocesseurs embarqués tel que dans l'IoT ou dans des véhicules intelligents mais aussi de plus haut niveau avec du développement pour smartphone à la fois IOS et Android. Tout ça en gardant en tête les performances et la sécurité.
  • Computer Science Bachelor's Degree
    ENSICAEN
    2016
    Deux ans d'école d'ingénieur post-prépa. Une formation en informatique généraliste allant du développement bas niveau en C et en assembleur, jusqu'à la conception de systèmes informatiques mais aussi des technologies web telles que PHP, HTML5, CSS, Javascript. J'ai décidé de me réorienter avant la fin du cursus

Skill set

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