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Alexandre G.AG

Alexandre G.

React.js / React Native Developer

€490/day
Rennes, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Alexandre

Experienced front-end web developer, I work with the latest JavaScript technologies and stay up-to-date.

Agile, I master the Scrum project management process, the Git source code manager, and various continuous integration tools.

I have made the maintainability and readability of my code my forte. I am up-to-date with the best coding practices to produce with confidence and simplicity.
  • English

    Fluent

  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • Mergify
    Software Engineer
    TECH
    July 2022 - Today (3 years and 11 months)
    Front-end developer at Mergify, I am involved in the design and optimization of complex web interfaces, with a strong emphasis on reliability, performance, and user experience.

    I work daily on a React application used by thousands of developers worldwide, integrating custom components, connecting external APIs (e.g., GitHub), and continuously improving the product's ergonomics.

    👉 My strengths:
    • Clean, maintainable, and documented React.js / TypeScript development
    • Seamless integration of content, forms, tables, and dynamic interactions
    • Strong experience in product team collaboration, and autonomy on complex technical subjects
    • End-to-end testing with Playwright and Cypress

    Ability to quickly deliver functional solutions without compromising quality.

    📦 Stack: React, TypeScript, CSS Modules, TanStack Query, CI/CD, Design System, GitHub API integration.
    React.js React Query Typescript Playwright Cypress
  • Cegid
    Front-End Developer
    DIGITAL AND IT
    August 2019 - Today (6 years and 10 months)
    Rennes, France
    The team is responsible for taking over a complex legacy tax optimization application for a large account client.

    Complete refactoring of the legacy code to reduce technical debt and harmonize an outdated graphic charter by migrating it to Material Design.

    - Writing documentation to facilitate knowledge transfer.
    - Implementing unit tests on legacy code.
    - Taking responsibility as the sole front-end technical referent in the team.
    - Familiarization with an agile scrum environment.
    - Participation in sprint retrospectives of another team as facilitator.
    - Management of the front-end development environment (webpack, babel, tslint, jest).
    - Mastery of Git.
    - Responsibility for updating various front-end libraries.
    - Management of security alerts on front-end libraries reported by the Blackduck tool.
    Typescript Agile methodology Scrum React.js Continuous integration SQL Jest React Testing Library
  • Hissez-Haut
    Front-end Developer
    DIGITAL AND IT
    July 2016 - January 2017 (6 months)
    Quimper, France
    Participation in the creation of e-commerce sites for various clients near Quimper.

    Development of a new application for managing event seating plans (weddings, baptisms, etc.).

    - Creation of mockups in collaboration with the team's graphic designer.
    - Creation of the interface in ReactJS.
    - Participation in setting up the server in PHP.
    PHP Laravel React.js redux

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