Ahmed is available for hire
Hire AhmedAhmed Yosri
Verified Expert in Engineering
Game Development Developer
Bucharest, Romania
Toptal member since October 30, 2019
Bio
Ahmed has been a generalist game developer since 2012. He has worked on gameplay, shaders, artificial intelligence, full-stack, and performance at companies such as Gameloft, Forgotten Mines, and an Egyptian startup. He enjoys development as much as learning new technologies and algorithms.
Portfolio
YAGER
3D Games, C++, Artificial Intelligence (AI), Perforce, Jira, Confluence...
Electronic Arts
3D Games, Algorithms, Artificial Intelligence (AI), Behavior Trees, Blackboard...
Freelance on Toptal
Unity3D, C#, Algorithms, .NET, Unity2D
Experience
- Game Development - 11 years
- Unity3D - 5 years
- 3D Games - 5 years
- C++14 - 4 years
- C# - 4 years
- Subversion (SVN) - 3 years
- Git - 2 years
- 2D Games - 2 years
Work Experience
Senior Unreal Engineer
2024 - PRESENT
YAGER
- Contributed to a multiplayer project using Unreal Engine 5 and led the development of different areas, like open-world AI, weapons, and progression. Empowered others to own and contribute to AI. Reduced server performance by 70%.
- Pushed our review and documentation standards for knowledge distribution and automated testing, as a team player.
- Assessed different AI tools according to our project's needs, as a project shaper. Continuous contribution to project health, sometimes automating parts of it.
Technologies: 3D Games, C++, Artificial Intelligence (AI), Perforce, Jira, Confluence, Architecture, Software Architecture, Unreal Engine 5, TeamCity, JetBrains Rider, Horde, Game Development, C++11
Software Engineer | Frostbite AI
2020 - 2023
Electronic Arts
- Developed AI systems in Frostbite Engine that empowered titles like Battlefield 2042, Madden franchise, and Iron Man. Helped with the onboarding of new engineers and mentored juniors.
- Developed Runtime and Pipeline components in C++, maintaining memory/CPU/readability. Editor components in C#. Designed tool APIs according to our security policies. Polished our testing module. Optimized the workflows by writing custom editors.
- Supported customer teams (in different time zones) through different communication channels to propose new features and clear migration policies, as well as communicate usage examples through test modules.
Technologies: 3D Games, Algorithms, Artificial Intelligence (AI), Behavior Trees, Blackboard, C++, C++17, C++11, C#, C#.NET, Model View ViewModel (MVVM), Architecture, Code Refactoring, Jenkins, Perforce, Game Development, Confluence
Senior Unity Developer
2020 - 2020
Freelance on Toptal
- Defined and updated MVP plan regularly (five sprints plan).
- Created a layer over house generation asset to extend the functionality to control individual rooms/floors/buildings.
- Developed one-to-many Dijkstra-based piping system.
Technologies: Unity3D, C#, Algorithms, .NET, Unity2D
Senior Unity Developer
2020 - 2020
Freelance on Toptal
- Ported the project to Android and reduced build size to less than 100 MB (40% size reduction).
- Integrated Amazon's Polly and created a tool to generated audio files from lesson files.
- Updated game's text-to-speech from runtime to cached files system.
Technologies: Unity3D, Unity2D, Software Architecture
Senior Game Programmer
2017 - 2020
Gameloft
- Worked on gameplay, AI, and shaders for Modern Combat: Rogue League.
- Re-engineered 75+ classes to implement an object pool to eliminate micro freezes.
- Reduced memory leaks from 100+ MB per level to 0 MB.
- Developed a goal-oriented planning AI system to replace state-machine-based logic.
- Collaborated closely with producers, animations, and sounds to implement different gameplay features.
- Collaborated with QA and data tracking teams to implement data tracking in the game.
- Developed various shaders like LUT, aiming, and character highlighting.
Technologies: Unity, C++14, Unity3D AI, Algorithms, Artificial Intelligence (AI), Game Tools Development, Unity3D GUI Development, 3D Games, Game Development, Subversion (SVN), OpenGL ES, XML, Lua, Unity3D, C#, C++, Unity2D, Software Architecture, C++11
Unity Developer (Remote)
2016 - 2017
Forgotten Mines
- Integrated Gameroom and Steam authentication in the game.
- Kept the game up to date with the latest SDKs from SendGrid, Facebook, and Steam.
- Designed and implemented invitations and rewards system (full-stack development using Azure).
- Implemented the following shaders: Planetarium ocean, clouds, and lava.
- Worked on various client-side features.
- Completed code reviews and peer-to-peer reviews.
Technologies: Unity, Algorithms, Unity3D GUI Development, 3D Games, Game Development, Subversion (SVN), Universal Windows Platform (UWP), Steam, Facebook, SendGrid, Azure, Photon, Unity3D, C#, .NET, Unity2D
Unity Lead Programmer
2014 - 2017
Penta Value
- Designed and fully implemented nine Unity3D projects (3/2D apps/games) and helped to ship another two.
- Developed a Kinect v2 Avateering wrapper used in five projects and a Kinect Framework used in four projects.
- Explained to potential investors how to monetize existing projects.
- Handled communications with freelance 3D artists to cope with project requirements.
- Managed the hiring process and ramping up for two junior developers and introduced them to existing projects.
- Conducted code reviews for fellow developers.
- Worked with iOS, Android, and back-end developers to deliver RoboApp, a cross-platform native application building system.
Technologies: Unity, Unity3D Pathfinding, Algorithms, Artificial Intelligence (AI), Game Tools Development, Unity3D GUI Development, 3D Games, Game Development, Git, Subversion (SVN), Augmented Reality (AR), Virtual Reality (VR), Microsoft Kinect, Unity3D, C#, .NET, Unity2D, WebGL, Software Architecture, ARKit
UE4 Developer (Remote)
2014 - 2015
2ndborn
- Created a 3D multi-layered platforming demo.
- Handled the technical side including repo setup, introducing team members to version control, and how to organize assets and animations.
Technologies: 2D Games, 3D Games, Game Development, Git, C++, Unreal Engine 4
C++ Game Programmer (Remote)
2013 - 2014
Modern Entertainment HQ
- Developed reinforcement learning-based AI that could adapt to any player style in less than five battles.
- Developed multi-tier behavior trees that integrated with ML-based AI.
- Enhanced engine memory consumption during load by ~75%.
- Developed multi-scene editing feature to our engine.
- Developed mini-map shader.
Technologies: C++14, Machine Learning, Algorithms, Artificial Intelligence (AI), 3D Games, Game Development, Git, DirectX 11, C++, C++11
Project History
Machine Learning and Multi-tier Behavior Tree Code Snippet
This is the core part of the ML-based combat system I developed in 2013 for Bain's redemption, a 3D slashing/shooting game.
Component-based Architecture
In this sample, I developed a component-based architecture that allows you to create a full Match-3 game and more.
Also, it allows you to create scenes, prefabs, add sounds, among other features.
Also, it allows you to create scenes, prefabs, add sounds, among other features.
Modern Combat Rebel Guns
https://www.google.com/search?client=firefox-b-d&q=modern+combat+rebel+gunsAs part of delivering this project, I implemented different 3D render shaders that ran on Android devices using techniques like stencil buffers. Shaders were implemented using GLSL SE.
The Rescuer
http://www.youtube.com/watch?v=55WEwiML9xQFor my first big project, I implemented rendering from scratch using OpenGL (the ancestor of Vulkan).
I have also implemented AI and navigation systems from scratch, as well as a simple physics engine, all in C++.
I have also implemented AI and navigation systems from scratch, as well as a simple physics engine, all in C++.
Education
2008 - 2012
Bachelor of Science Degree in Computer Science and Bioinformatics
Ain Shams University - Cairo, Egypt
Skills
Libraries/APIs
TensorFlow, OpenGL ES, Managed Extensibility Framework (MEF), DirectX 11, Sockets, REST APIs, WebGL, OpenGL
Tools
Subversion (SVN), Perforce, Git, Amazon Polly, SendGrid, Jira, Confluence, TeamCity, JetBrains Rider, Jenkins
Languages
JavaScript, Swift, C++, C++17, C++14, C#, C, C++11, C#.NET, MaxScript, Lua, XML, Java, Python, SQL, Lava, GLSL
Frameworks
Unity3D, Unity, Microsoft Kinect, .NET, Unity2D, Photon, Unreal Engine 4, OpenNI, Photon Unity Networking (PUN), Horde, ARKit
Storage
JSON
Paradigms
RESTful Development, Behavior Trees, Model View ViewModel (MVVM), Code Refactoring
Platforms
Firebase, Windows, Steam, Universal Windows Platform (UWP), Azure, iOS, Android, Blackboard
Other
Unity3D GUI Development, Games, Game Development, Game Tools Development, 2D Games, 3D Games, Freelancing, Unity3D AI, Unity3D Pathfinding, Augmented Reality (AR), Virtual Reality (VR), Shaders, Processing & Threading, Linear Algebra, Algorithms, Artificial Intelligence (AI), Reinforcement Learning, Machine Learning, Multiplayer, Unity Game Assets, Facebook, CryENGINE 3, Unity Editor Scripting, Architecture, Software Architecture, Unreal Engine 5, Game Physics
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