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David BarredoDB

David Barredo

Unity Developer (Freelance)

€225/day
Paris, FR
0-2 years

Average response time: 1 hour

Freelancer profile translated to English.
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About David

Software Engineer (Master Epitech) and Unity Developer, I support studios, communication agencies, and creatives in the realization of their interactive projects.

My approach combines the rigor of engineering (clean C# architecture, memory optimization, Clean Code) with a strong sensibility for gameplay and user experience. I design robust systems, designed to be scalable and performant, without ever sacrificing the creative vision of the project.

I recently oversaw the end-to-end technical development of an interactive art installation exhibited internationally (Paris / Alexandria). This project involved significant optimization constraints to run perfectly smoothly via WebGL on specific hardware (Raspberry Pi 5).

My areas of intervention:

  • Rapid Prototyping: Transform an idea into a playable game mechanic in a few days.
  • Gameplay Programming: AI, economy systems, controls, physics integration.
  • End-to-End Development: Complete realization of applications for events, exhibitions, or serious games (PC, WebGL, Mobile).
  • Optimization: Code cleanup, architecture refactoring, performance optimization.

Autonomous and accustomed to agile environments, I integrate just as well as reinforcement for an existing production team as a solo developer on a fixed-price project.

Let's discuss your next technical challenge!
  • French

    Native or bilingual

  • English

    Fluent

  • Spanish

    Fluent

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

Experience

  • SpaceMemory Studio
    Unity Developer (Freelance)
    VIDEO GAMES AND ANIMATION
    February 2026 - April 2026 (2 months)
    Paris, France
    Technical development of the interactive installation "Burning Blue"
    Conception and programming from A to Z of an immersive digital experience for the international exhibitions of the contemporary artist Vidya-Kélie (Paris & Alexandria).

    The technical challenge:
    Translate a complex artistic vision into a robust interactive device, capable of running continuously for the general public, with a strong hardware constraint: the application had to run smoothly via a WebGL build executed on a Raspberry Pi 5.

    My achievements on this project:

    - Full-Stack Unity Development: Complete programming of interactions, logic, and visual rendering on Unity (C#).

    - Artistic Collaboration: Iterative exchanges with art direction to ensure the "Game Feel" and rhythm of the application respected the original artwork's intent.

    - Hardware Optimization (The core of the mission): Drastic work on memory management, asset optimization, and fluidity (framerate) to guarantee the absence of crashes or slowdowns on a micro-computer (Raspberry Pi 5) in a public exhibition context.

    - Deployment: Creation of final WebGL builds and technical support for the installation on physical kiosks.

    The result: A stable application, currently handled by visitors during international cultural events, demonstrating the reliability of the implemented software architecture.

    Technical environment: Unity 3D, C#, WebGL, Raspberry Pi 5, Performance Optimization, Prototyping.
    Unity 3D WebGL Video games Gameplay C#
  • Cosium
    Software Engineer
    SOFTWARE PUBLISHING
    January 2022 - September 2025 (3 years and 8 months)
    Paris, France
    Design, development, and maintenance of critical business applications and robust backend architectures.

    • Development of complex backend features for high-traffic web applications.
    • Implementation and maintenance of containerization and continuous integration pipelines (CI/CD) to ensure smooth and secure deployments.
    • Strict application of Clean Code best practices and demanding code reviews.
    • Performance optimization and architecture problem-solving within a team working in Agile methodology.

    This experience forged my solid rigor in software architecture (OOP) and a strong optimization capability that I now apply to developing complex systems on Unity.
    Java Docker Gerrit Spring boot Software Architecture

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Education

  • Master in Software Engineering (Bac +5)
    EPITECH Paris | 2021-2025
    2025
  • Associate Degree in Applied Physics
    IUT Montpellier | 2019-2021
    2021

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