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I'm very experienced in Desktop Application Development, Mobile Games and Mobile Native App, Web Development. My main skills are below: C/C++, .Net, WPF, WinForms, Java/C#, HTML5/CSS3, PHP/JSP/ASPX, Unity2D/3D, Cocos2D, Android/iOS, etc... I can speak English fluently, so I can keep smooth communication. I'm able to dedicate 40~60hrs/week to your project and daily working hours are flexible. Currently, I'm in GMT+8, but I can set our clock to your time for better communication. I will do our best to make clients satisfied with good quality and timeline. Please contact me if I am a match for you are looking for. Best Regards.

Unity Developer | 2D/3D Animation | VR/XR | C# SUMMARY Unity Developer with 5+ years shipping mobile titles and building XR prototypes. Strengths in animation programming, performance tuning, and Unity tooling. Unity Certified Developer with a record of cross‑team delivery. SKILLS Unity 2D/3D • C# • XR Interaction Toolkit • OpenXR • World‑Space UI • Mobile Optimization • Animation Integration • Tool Development • Debugging • Spine • Git • Unity Editor Tools EXPERIENCE Unity Developer (Remote) - CMD Studios | Jun 2023 – Present  Built and optimized 2D/3D animations and gameplay features for Unity mobile games.  Created custom tools to streamline animation data workflows and reduce integration time.  Diagnosed and fixed performance issues using Unity Profiler and targeted refactors. Unity Developer - Shanghai - TOP GAMES INC | Nov 2021 – Jan 2023  Scripted 2D animation logic and UI for Whispers and Bingo Island; reduced memory usage and lag on iOS/Android.  Established reusable frameworks for reward pop‑ups and transitions.  XR/VR Prototyping Assignment (Nov 2021 – Nov 2022): Developed Unity VR prototypes using XR Interaction Toolkit and OpenXR; implemented interaction, locomotion, and world‑space UI; optimized to target framerate; documented VR best practices. Unity Designer - Shanghai Kuangre Network | Aug 2016 – Sep 2021  Designed and integrated UI/UX animations; optimized for responsiveness across devices.  Built reusable animation libraries; mentored junior contributors. EDUCATION & CERTIFICATION BA Management - University of United Nations, Moscow Unity Developer Certification - Unity Technologies

Hi, I'm Leo, a Top-Rated Plus Unity Developer with 13 years of experience. I've been a full-time freelancer on Upwork for over 9 years, maintaining 100% Job Success across 15,000+ hours. Clients rely on me for steady, responsive collaboration—I'm here every weekday, reply quickly, and keep projects moving. I take on both new builds and the work many developers shy away from: bringing legacy or broken Unity projects back to life. What I do best: • Gameplay Systems – Building puzzle mechanics, racing physics, casual games, VR/AR interactions, etc. • Integrations – Setting up ads, analytics, and platform tools (Meta Quest, SteamVR, VRChat, Map SDK). • Optimization – Profiling and fixing performance issues so everything runs smoothly on target devices. • Project Modernization & Rescue – Upgrading outdated Unity versions, fixing deprecated code, refactoring messy codebases, and porting old projects to modern platforms (WebGL, mobile, VR/AR). What clients say about working with me: "Didn't just follow instructions – added creative touches and smart improvements at every step." I focus on those extra details that make your project better. "Made everything easy and efficient... professionalism stood out." Clear communication and on-time delivery. "Always communicates... puts his heart into his work." Collaboration is smooth and straightforward. "Would hire again in a heartbeat." I aim to be your long-term partner. My specialties: • Fun games (Puzzles, Casual, Racing – Mobile / PC) • VR & AR experiences (Meta Quest apps and games) • Interactive tools and applications • Quick prototypes and test versions • Legacy project recovery, upgrades, and platform porting If you have an old Unity project that needs a steady hand, or a new idea you want built right the first time, let's talk. I'm ready to help bring it to life.

I'm a developer with over 15 years development experience in many fields, including computer vision and deep learning solution, full-stack development, Python data process, web service application, LLM application and so on. With rich software architect experience, I could also help you on software architecture, building tech stack at project start phase. With rich software solution experience, I could analyze requirement document and provide necessary project plan, feature design and so on. • skill set include: Python, C/C++/C#, java script, vue.js, PHP, java, web service • experienced in computer vision, deep learning training & deployment solution • experienced in building big data solution in cloud computing environment • experienced in building LLM related project, like ChatGPT integration, finetune and API development • good at software performance optimization

I'm a .NET/C# fullstack software engineer with 10+ years of experience in building desktop applications and websites in the field of MIS and E-Commerce. I'm familiar with .NET Framwork, .NET Core and .NET 5+ and have developed several projects based on MVC, WebApi, Razor, EF, SqlSugar, Npoco, DI, IoC and so on. I also have some frontend experience with HTML, CSS, Javascript, jQuery and AngularJS.

Software Developer I have 10 years of software development experience in backend service, Unreal Engine development, gameplay development, GAS plugin, Dedicated server, VR/AR game project Blueprint * C++ * Pixel Streaming * NTF game * Unreal Engine * Dedicated Server * State Machine * Behavior Tree * C++/STL/Boost/Multi Thread *UE4 Animation/Mesh/Texture/Particle used *UE4 GAS Gameplay Ability System Languages: C/C++(included C++11), C#, Java, Lua, Python, Shell, UE4/UE5, blueprint Develop Tools: Vim, cmake, Visual Studio, GCC, GDB, Git/SVN, StarUML, Tcpdump, netstat, valgrind, git lfs