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Jonathan KremerJK

Jonathan Kremer

Back-End Developer / C / Lua

€250/day
Mulhouse, FR
3-7 years

Average response time: 1 hour

Freelancer profile translated to English.
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About Jonathan

Passionate and rigorous developer, I support companies, startups, and project creators in developing high-performance software solutions, optimizing code, and creating interactive environments.

Specializing in system programming (C Language) and an expert in the Lua / Luau ecosystem, I offer nearly 10 years of self-taught experience on the Roblox platform, where I have designed and launched projects with over 650,000 visits. This dual expertise allows me to combine strict algorithmic logic with strong creative sensitivity.

What I can concretely bring you:
- Lua / Luau Development (Roblox): Creation of advanced scripts, client/server logic, data persistence, and performance optimization.

- Software & System Development (C): Writing clean, modular, and optimized code for memory management.

- Scripting & Automation: Design of small internal tools and scripts (Python) to improve your business processes.

Currently a 2nd-year student at EPITECH, I am accustomed to meeting tight deadlines and delivering high-quality, documented code. I am available for fixed-price or part-time missions. Let's discuss your project!
  • English

    Native or bilingual

  • French

    Native or bilingual

Remote only
Primarily works remotely

Experience

  • CIBEO (Mulhouse)
    Internship
    SOFTWARE PUBLISHING
    January 2022 - January 2022
    Mulhouse, France
    Full immersion within the technical team. Active discovery of the project lifecycle and web development. Observation of complex software architectures and the company's digital solutions. Concrete initiation to agile design methods and adherence to good coding practices (Clean Code).
    Web Development System Programming
  • Roblox (Projet Personnel)
    Independent Lua / Luau Developer
    VIDEO GAMES AND ANIMATION
    August 2022 - August 2025 (3 years)
    Mulhouse, France
    Design and full development of a social and exploration game based on persistent message sharing (650k+ visits).

    Backend & Data: Implementation of player data storage (Datastores) and real-time message replication management.

    Security & Compliance: Integration of moderation APIs and dynamic text filters to secure user inputs.

    Lifecycle: Regular monitoring of updates (Version 19+), writing technical change logs, and complete UI/UX optimization.
    Lua Roblox System Programming Git UX/UI Designer

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Education

  • Expert in Information Technology
    EPITECH Grande École Program
    2030
    Expert en Technologies de l'Information
  • High School Diploma
    ACADEMICA INTERNATIONAL STUDIES
    2025
    High School Diploma

Skill set

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