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Hadouin LeroyHL

Hadouin Leroy

Creative dev

€550/day
Paris, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Hadouin

Looking for a frontend developer who can quickly understand, bring a real creative direction, and challenge your ideas to move them forward faster?
That's exactly where I am most useful.

I have 4 years of professional development experience, including freelance, apprenticeships, and startups, with a profile at the intersection of frontend, product, and UX/UI.

I quickly understand project stakes, even when the need is still unclear. I identify what needs to be clarified, simplified, or better thought out to speed up implementation.

My strength lies in combining technical execution with creative vision.
I can take an idea, challenge it, give it a stronger direction, and transform it into a concrete, coherent, and well-executed interface or product.

I work on:

web applications and dashboards
frontend platforms
UX/UI redesigns
landing pages
interactive and 3D experiences

I work with React, Next.js, Svelte, Angular, TypeScript, CSS/SCSS, Figma, Git, Docker.

I don't just execute.
I challenge, I structure, and I move things forward.
  • French

    Native or bilingual

  • English

    Native or bilingual

Can work on-site
Paris (up to 20km)

Experience

  • RUNE LABS
    Web3 Game Developer
    VIDEO GAMES AND ANIMATION
    January 2025 - Today (1 year and 5 months)
    Paris, France
    • • End-to-end design of Midgard, our crypto gaming platform: UX/UI, brand identity, logo, and 3D assets, with a strong gaming visual direction and a mobile-first responsive approach.
    • • Led the frontend development of Ponzi Land, in collaboration with the Game Designer, to create a fluid, intuitive, and immersive on-chain gaming experience.
    • • Development of animated interfaces, Three.js scenes, and Blender assets, with optimization of rendering performance.
    • • Participation in a product that generated over $100k in transaction volume.
    Blender Frontend Development UI/UX Design
  • Dassault Systèmes
    Software Engineer Apprentice
    SOFTWARE PUBLISHING
    September 2023 - January 2025 (1 year and 4 months)
    Paris, France
    • • Design and end-to-end redesign of a documentation engine, from requirements gathering to production deployment.
    • • Stack definition, custom plugin development, and setup of Docker / GitLab CI/CD infrastructure.
    • • Integration of a code demonstration tool in a Product Owner role, focusing on product, UX, and technical aspects.
    Frontend Development Agile Methodology Docker JavaScript
  • Junior ISEP
    Technical Lead
    SOFTWARE PUBLISHING
    March 2023 - July 2024 (1 year and 4 months)
    Paris, France
    • • Design and development of JE Intervenants, an Angular PWA combining a user mobile application and an administrator dashboard.
    • • Frontend management, design of mobile and desktop interfaces, and project coordination in SCRUM with multiple collaborators.
    • • Delivery of a product deployed in over 20 organizations and used by more than 2000 professionals, with post-sales maintenance and management.
    • • Technical qualification of custom applications, notably for Ampère Renault.
    Agile Methodology Frontend Development Figma JavaScript UI/UX Design

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Education

  • ENGINEER
    ISEP
    2025

Skill set

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