Software Engineer
Hi, I’m Mattias Fuster. I build games, engines and tools in C++.
A short story about me.
I'm a junior software engineer who enjoys working close to the metal — from architecture decisions to performance tuning. I've shipped features in production games, built tools that saved my team time, and I'm currently on the R&D team at Virtuos Labs in Montpellier. On the side I'm building ImEngine, my own game engine written from scratch in C++23. I like clean, purposeful code, and I tend to dig into problems until I actually understand them.
- Email : fuster.mattias@gmail.com
- Phone : +33(6) 28 77 80 45
- Current city : Montpellier, France
- Languages : French, English, Spanish
- Degree : Master's in Game Development
- Freelance : Available
Current Projects
Projects Done
Companies
Years of experience
I'm most at home in C++, whether that's engine code, gameplay systems, networking or tooling — and I pick up whatever the project needs along the way.
- Modern C++ (up to C++23)
- Unreal Engine & Unity
- Optimization & debugging
- Tools & pipelines
Skills
Languages
Services
Engine Development
Game Development
Network & Multiplayer
Tools Development
Education
2022 - 2025
Game Academy - Avignon
Master's in Game Development — graduated top of the class.
2020 - 2022
Secondary school Théodore Aubanel - Avignon
BTS-SIO SLAM (Higher National Diploma) in work-study, IT Programmer/Developer
2019 - 2020
University (C.E.R.I) - Avignon
Bachelor's degree in Programming, Mathematics track (Algebra and Arithmetic).
2016 - 2019
Secondary school Jean-Henry Fabre - Carpentras
French Scientific Baccalaureate specializing in Engineering Sciences
Experience
Feb 2026 - Present
Software Engineer Intern - Virtuos Labs
R&D internship in Montpellier. I'm implementing a mesh partitioning optimization algorithm and contributing to two tools that help stabilize and speed up game production workflows.
Sep 2025 - Feb 2026
Network & Gameplay Programmer - Carfooly
Set up the networking (PlayFab) for a multiplayer game on Unreal Engine 5.6, and refactored the project from Blueprints to C++ — cleaning up the architecture and improving performance along the way.
Mar 2024 - Jun 2024
Post-Launch Support Engineer - Collision Studio
Post-launch support on Terra Alia (Unity, released on Steam). Tracked down and fixed a critical deadlock in the dialogue system — a race condition across concurrent coroutines — that was blocking a major content update, plus 10+ other reported bugs over the 3-month contract.
Sep 2023 - Dec 2023
AI & Tool Programmer - PVA Medias
Built a procedural NPC generation prototype in Unreal Engine 5, wiring LLM and TTS models into the engine to generate storylines, personalities and dialogue. Delivered the full pipeline, from model integration to in-engine runtime, in four months.
Sep 2020 - Jun 2022
IT Support Apprentice - A.T.I.R
Two-year apprenticeship alongside my HND: IT support and maintenance for users, plus development of a billing website.
