Leonnel Hammel

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Resume 🡫

I'm a |

Computer Science Student | Specialized in Game Programming & Maths passionate about writing efficient, clean code while embracing new challenges in game development. Actively seeking an opportunity to improve my skills in a dynamic environnement

< Technical Skills /> // Languages • Engines • Tools

Languages

Data sql-database-generic SQL Database (Generic) image/svg+xml Amido Limited Richard Slater
file_type_hlsl

Engines & Frameworks

Sfml Streamline Icon: https://streamlinehq.comSFML

Development Tools

Wwise Streamline Icon: https://streamlinehq.comWwise

< Soft Skills /> // Communication • Teamwork • Proactive

Communication

To be an effective communicator, I ensure that what I say is professional, inclusive, and well received by others. I strive to be an approachable and reliable team member and follow through on commitments

Eager to Learn

Every project has many opportunities to learn something new, and thus I am always curious to learn something new from the project itself or from the talented people around me contributes to growing my skillset

Teamwork

I want to be a colleague others can rely on, always being willing to receive and give feedback. Thus, I endorse peer programming, code reviews, and discussions to make everything just a bit better

Feedback driven

I see constructive feedback as valuable information for becoming better as a professional. To grow as one, I frequently seek feedback on my deliverables and collaboration quality for others then act on them to improve my work

Proactive

Dealing with blocks or setbacks requires a healthy amount of dedication and the willingness to not give up. Where logical, I will strive to find a solution with clear impact, options, and a recommendation or raise awareness of a problem with the team

Ownership

I take responsibility for the outcomes of my work and my impact on the team. I set clear expectations, communicate progress and risks early, and follow through on commitments. When I miss the mark, I own it, learn, and put improvements in place so we move forward stronger

< Work Experience /> // Current • Past • Future?

Vrai Studio, Albi FR

Game programming Software Engineer Intern
June 2025 - August 2025

Unity
C#
VR
OOP
Git
Mobile
Jira
Design patterns
3C
Zenject

Bunny Kids (Mobile Game)

  • Built a planet creation tool so non-technical staff could design and add new worlds without coding
  • Designed and delivered a custom in-app purchase (IAP) system by extending Unity’s IAP Catalog and existing implementation
  • Refactored and optimized an in-editor painting tool, profiling performance across devices and applying Unity Jobs/Burst optimizations for mobile hardware
  • Created, debugged iOS builds (Xcode, App Store) and Android builds (Gradle, Play Store)
  • Refactored and optimized in-editor tools with Unity Jobs/Burst for better mobile performance

L’Aventure du Compost VR

  • Implemented an interactive camera gameplay feature (photo capture + insect collection) using Unity’s RenderTexture with performance-conscious scaling and draw call optimizations
  • Added player rotation controls and integrated haptic feedback on VR joysticks by combining Unity’s new Input System with Auto Hands
  • Profiled and optimized gameplay code (physics calls, conditional checks, draw calls), significantly improving FPS stability on standalone VR headsets with limited RAM and GPU resources

Unannounced Adventure Prototype

  • Implemented character controls (3Cs) and interaction systems using Unity’s new Input System, with collision optimizations for interaction whiskers
  • Designed and implemented a decoupled architecture leveraging Zenject, Event Bus patterns, and ScriptableObject-based service locators, reducing code coupling and improving maintainability
  • Supported early prototyping with a focus on performance and maintainability

Swisscom, Lausanne CH

Software development assistant intern
June 2024 - August 2024

C++
WPF
OOP
Perforce
CI/CD
UI/UX
  • Assisted with software development, debugging, and testing. Optimized the internal issue detection system and enhanced user
    experience by reducing memory usage from 20% to 7% via C++ memory layout optimization techniques
  • Facilitated feature integration and conducted comprehensive code reviews. Implemented design team requests while ensuringadherence to project standards
  • Documented technical processes and improvements, ensuring thorough code commenting for future maintenance and developing scalable documentation to support team collaboration
  • Collaborated with cross-functional teams, achieving a 20% reduction in feature delivery time

< Projects highlight /> // Shipped • Past • Current : Games/Demos

Bunny Kids

Shipped
7
1.5 years (3 month in internship)
2025
Unity 6
Profilling
Optimization
C#
OOP
iOS
Android
Educational adventure for children aged 3 to 6 in the world of dreams and space!BunnyKIDS is a fun and educational app that invites your child to travel from planet to planet through the dreams of Bunny
Collaborated with cross-functional teams composed of programmers, artists, game designers and others
Designed and delivered a custom in-app purchase (IAP) system by extending Unity’s IAP Catalog and existing implementation
Build for iOS and Android, continous build testing on multiplateform setup
Find Out More

SUNA

Released
10
9 Weeks
2025
Unity 6
Multiplayer
ECS/DOTS
Network for Entities
Multilayer servers
SUNA is a competitive FPS game, set on a dystopian planet devastated by the ongoing war between the native population and the Corporation entity
This project was started with the team presented later on this page as part of our 3rd year at Creajeux. It is a student project aimed at improving our skills in game development and teamwork, as well as exploring new technologies and methodologies
Engineered a server-authoritative multiplayer infrastructure in Unity leveraging ECS and C#, ensuring deterministic statereplication and secure client–server gameplay
Find Out More

Project Gamma

Work in Progress
1
6 Month
Unreal
C++
Multiplayer
OOP
UML
HLSL
Capstone project to validate the diploma
Inspired by Assassin's creed black flag for the world, as proof of concept seen in the video above
Client-Server authoritative for the global multiplayer and peer to peer architecture for private lobbies
Custom shader for water and ship movement visuals
Structured code base, respecting design principles, SOLID, game design patterns with less coupling and more testing
Coming Soon
Explore More Projects

< Education /> // Current • Past

Creajeux, Nimes FR

B.Sc in CS | Game Programming
2022-2026

  • Built multiple 2D & 3D games in modern C++ and C#, applying design patterns and solid architectural thinking
  • Practiced ECS, gameplay programming, and engine/tools development
  • Progressed from procedural C/C++ to OOP in C++/C#
  • Strong game-math foundation: linear algebra & trigonometry :
    - 3D geometry and camera/projection transforms; quaternion rotations (axis–angle/Euler, SLERP)
    - calculus & numerical methods for physics (derivatives, integrators, root-finding)
    - collision/interpolation tools (ray tests, AABB/SAT, LERP/Bezier)
  • Completed yearly cross-disciplinary projects with game art students; frequent workshops & masterclasses
  • Applied multithreading & concurrency for gameplay and tools (tasking, synchronization)
  • Networking (C++/C#):
    - TCP/UDP sockets
    - client–server & P2P packet framing + binary serialization reliable-UDP
    - replication/delta sync; prediction/interp/reconciliation
    snapshot/rollback
    - auth/handshake
  • Explored engine architecture and low-level systems (memory, data-oriented design)

Creajeux, Nimes FR

Preparatory Year for the Bachelor
2021-2022

  • Math Refresh: analysis, algebra, geometry for 2D/3D
  • Programming (Lua, 2D projects):
    - Fundamentals data & basic algorithms
    - paradigms (procedural, event-driven, functional) modular design, error handling
    - Game main loop, sprites/animation, collisions, input, audio
  • Capstone Group Project: spec, prototyping, agile workflow, final presentation
  • 3D Modeling (Maya): fundamentals, interface, basic pipeline
  • Digital Imaging (Photoshop): core workflow, key tools, pixel art, color
  • Game Culture: industry overview, roles, hit franchises, notable creators

< Testimonials Highlight /> // Some feedback about my work, more on linkedin

Hi, I'm Leonnel

I’m a 28-year-old game programming student, currently in my 4th and final year at Creajeux, in France. Before pursuing my passion for game development, I worked in event organization and human resources while living in Montreal, Canada

I see myself as a dedicated problem solver, always looking for new learning opportunities and ways to improve/sharpen my skills. I enjoy crafting games that not only feel great to play but are also built with clean, well-organized code. I thrive on tackling complex challenges, sometimes maybe too much, as I can get deeply absorbed until I find the perfect solution

Want to know more? You can find my contact information in my resume at the top. You can also reach me on any of my social media
Designed & hand-coded by Leonnel Hammel · © All rights reserved