Hire the Best C++ Programmers & Developers
in Japan

Game programmer to help develop your vision delivering a great base code for your project. Have been working as a gameplay programmer using the latest game engines (Unity, Unreal) implementing gameplay prototypes in many different projects ranging from mobile, desktop to VR projects. Hope to starting to work with you as soon as possible.

With 25+ years building mission-critical trading systems for investment banks, hedge funds, and professional traders, I bring genuine front-office experience to every project - not just technical skills, but a deep understanding of what traders actually need and the low margin for error that comes with it. My background includes roles on the trading floors of ING Barings and UBS Securities, where I developed equity solutions in high-pressure, time-critical environments. Since then I've worked extensively with hedge funds and private investors, most recently in an ongoing relationship with a New York hedge fund spanning 5+ years, building strategy screeners, broker connectivity via Interactive Brokers/QuickFIX, and risk management reporting across Excel, Python, and Azure SQL Database. One of my core specialties is the intersection of Excel and C# - building sophisticated, real-time trading tools using Excel DNA, multithreaded C# DLLs, and custom broker APIs that go well beyond what standard VBA can deliver. I'm equally comfortable at the quant/data layer (Python, Plotly Dash, Bloomberg, Eikon) and the execution layer (QuickFIX, FIX Protocol, broker APIs). I have a particular talent for untangling complex, hard-to-reproduce bugs in live trading environments - the kind of problems that require both deep technical knowledge and genuine market understanding to diagnose. I'm looking for long-term client relationships with serious projects. If you're building something sophisticated in the trading/fintech space, let's talk.

Hi, I'm Yohan—a former programmer at two Japanese studios, now a full-time indie developer and consultant. I build fun, polished games and prototypes fast, then help you take them all the way to launch. What I can do for you End-to-End Game Development PC, console, Android, iOS Unity (C#), Unreal Engine 5 (C++/Blueprints) & Godot (C#/GDScript) Optimised builds, store-ready packages Multiplayer & Live Ops Photon Fusion / Mirror / PlayFab Unreal Networking & EOS Matchmaking, leaderboards, live events Next-Gen AI-Assisted Development (Optional) Fast Concept Validation – I use AI to quickly prototype and pressure-test ideas, so we know a mechanic is fun before investing in production code. Efficient Feature Scaling – Once I've built a rock-solid architecture, I offload routine feature work to AI to accelerate delivery while keeping review tight. No Blind Automation – I never hand complex debugging or core architecture to AI. Keeping humans in control of the foundations avoids the performance hits and technical debt that AI-generated code often introduces. Game Design & Documentation Original concepts, monetisation hooks GDDs, technical specs, task breakdowns QA & Play-Testing In-depth bug hunts, balance reviews Actionable reports with clear fixes Why clients hire me Pro studio background – shipped hyper-casual mobile titles, VR experiences, and console/PC projects in Japan. Full-stack mindset – code, design, art pipelines, build automation, Web3/NFT integration. Speed with quality – clear milestones, frequent builds, no surprises. Creative partner – I don't just execute; I suggest fresh ideas and better workflows. Let's talk.

I have been developing software for Linux for over twenty years, both professionally and personally, in a broad range of fields. My primary programming language is C, but I do a lot of work in Python and C#, and I use or have used many other languages in a variety of environments and operating systems. Game engine, tools and logic development is my main focus, but all aspects of programming interest me. I very much enjoy problem solving, and I am quite skilled at finding and fixing tenacious bugs. General areas of work include graphics programming, physics simulation, 2D and 3D math, high performance multi-threaded programming, debugging, compiler development, model import, export and processing tools. Languages: C, C#, Python, GLSL/HLSL, C++, Objective-C, Ruamoko (Objective-QuakeC (I wrote the compiler)), 80x86 assembly Tools: gcc, git, autoconf, automake, make, Blender, Unity, DJGPP, OpenGL, bash, sed Operating Systems: Linux, MS-DOS

Hi I’m Christian and I’m a professional game developer with over 10 years of experience. I have worked on both client and server side, and have developed many types of multiplatform games, including VR and AR games. For me user experience is very important, so rest assured I will deliver you intuitive and easy to use optimized games. Here is what I can offer to you: ➡️ Game Development: - Over 10 years of experience ( 10,000+ hours on Upwork ) developing games. - Client & Server side development experience. - Great communication skills. Recently I have worked as development team leader, twice. - Plenty of experience using Git. - Use of Software Architecture patterns for a high quality and easy to mantain game. - UX design skills to adjust the application to different screen resolutions. ➡️ Unity 3D - More than 10 years of experience making games and apps using Unity and C# - High quality code for an optimized and light size game builds. - Strong knowledge in all areas of Unity: Ui, Shaders / Materials, Animation, Unity Backend Services, etc. - Implementation of Addressables for remote assets loading. - Implementation of external APIs ( RESTful API, WebSockets, Firebase, etc. ) - Deployment in multiple platforms Android, IOS, WebGL, Windows, Mac, etc. - Augmented Reality and Virtual Reality development. ➡️ Web Game Development - Plenty of experience in pure Web Game Development - Knowledge in HTML5, CSS, Javascript and libraries like JQuery and Phaser. ➡️ Game Development without Engine - Solid knowledge in C++ - Experience using Dirext X as Graphics API. - HSL Shader development and other effets implementation like Shadow Maps. ➡️ Backend Development and CI/CD - Server setup and backend services development using Java or Node JS. - Database implementation using MySql or MongoDB. - CI/CD for automatic Client and Server builds deployment, making development faster. I'm a very easy to work with developer, who not only understand the requirements of the job but can also suggest improvements or ideas to make your project even more succesful. Looking forward to work with you!

Hi, I’m Yugo. Designer and a full-stack developer with 6+ years of experience delivering scalable, high-impact web applications across industries. Frontend: 3 years with Vue 3, 2 years with Angular Backend: 3 years with Django, 2 years with .NET Core Cloud & Tools: Amazon CloudWatch, Shopify, API integrations 3D Development: Integrating 3D objects into websites, interactive experiences Some projects I’ve worked on: A work management system managing employees, salaries, vacations, and financial data A financial startup platform for lending services, handling frontend/backend bug fixes, reporting, and AWS CloudWatch Shopify sites for content updates and ecommerce management 3D projects integrating interactive 3D models into websites, enhancing user engagement and visual appeal I love blending technology and creativity. From SaaS solutions to 3D-enhanced websites, I bring a sharp eye for detail and a passion for innovation. I'm fluent in Japanese, English and Portuguese, I also provide voice over. I’m currently available for freelance projects, let’s build something amazing together!