Fabio Mangiameli
Engine Programmer
My name is Fabio Mangiameli. I currently study Game Technology at the IT University of Copenhagen. I also work as a game programmer for Chasing Carrots. I love game development and have a passion for programming. Have a look at the game projects I did during my studies and professional career.
Proficient Programming Languages:
Tools I am experienced with:
Engine Programming related Projects
Game Programming for an unanounced Co-op Exploration Game
- Refactored Godot’s multiplayer networking with a custom C++ system supporting ENet and Epic Online Services. Integrated the architecture into the codebase and fixed a critical multi-mesh limitation in the EOS Godot extension.
- Optimized multiplayer systems to reduce crashes and disconnects by stress-testing under high latency and packet loss, identifying and fixing critical networking bugs.
- Implemented a player downed state and revive mechanic to enhance cooperative gameplay and failure recovery.
- Focused on game systems such as the room temperature system, electricity system and cruiser engine system
During the development of Halls of Torment, Chasing Carrots began prototyping a new title and I joined during the early stages, taking on a wide range of tasks. My main focus was building and iterating on core gameplay and technical systems while helping shape a stable multiplayer foundation for the project. The work required close collaboration, rapid prototyping, and solving practical engineering challenges to support the game’s direction.
Custom Multiplayer Networking in Godot
- Refactored Godot’s multiplayer networking layer to remove reliance on the built-in MultiplayerAPI
- Designed and implemented the integration of the MultiplayerPeer into the custom Communication Line System in C++
- Implemented peer-to-peer network meshes for both ENet and Epic Online Services using GDScript
- Integrated and validated the new networking architecture into the existing code base
- Identified and resolved a critical multi-mesh limitation in the EOS Godot extension
I replaced Godot’s built-in MultiplayerAPI with a custom networking layer that directly interfaces with MultiplayerPeer, improving flexibility, modularity, and authority handling. I also implemented full peer-to-peer network meshes using ENet and Epic Online Services, enabling low-latency client-to-client communication and support for features such as proximity voice chat. The system was integrated into the studio’s codebase, tested in gameplay sessions, and extended with a C++ fix to support multiple concurrent network meshes.
Performance optimizations for Halls of Torment
- Integrated Tracy into the custom C++ Godot engine build to enable deep runtime performance analysis
- Profiled heavy in-game scenarios with hundreds of active entities to identify real bottlenecks
- Implemented object pooling and spawning in seperate thread to reduce allocation overhead
- Introduced time slicing for the frost status effect, improving frame stability under load
- Added game object global position caching in C++ and exposed it to GDScript for gameplay systems
Back in 2024, this was the first task I received after joining Chasing Carrots as a Game Programmer. Halls of Torment was still in early access and suffered from performance issues toward the end of a run. As a survivor-like game, it features a large number of entities and projectiles on screen during the final minutes, which heavily impacted performance. With the upcoming console release in mind, I was tasked with investigating these issues and migrating the project from the Optick profiler to Tracy.