Hire the Best Game Developers
in Japan

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Rating is 4.5 out of 5.
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Guillaume L.

Naha, Japan

$45/hr
4.9
80 jobs

I help clients turn game ideas, prototypes, and existing Unity projects into playable, reliable systems that can be tested, improved, shipped, and maintained. My main focus is Unity development: gameplay programming, UI-driven game loops, mobile/WebGL builds, scoring systems, progression, player interactions, content workflows, and production features. I work especially well on projects that need more than just code implementation: I can help structure the gameplay flow, identify missing requirements, improve usability, and make sure the system is practical to maintain after delivery. What I can help with: • Gameplay systems, interactions, and core game loops • Playable prototypes, MVPs, and vertical slices • Improving or completing existing Unity projects • UI, menus, scoring, timers, progression, feedback, and game flow • Mobile, WebGL, desktop, and browser builds • Data-driven content using JSON/CSV • Custom tools to make content easier to update • Bug fixing, polish, project cleanup, and stability improvements • External service/API integration when needed I also have experience with Unreal Engine 5, Godot 4, Construct 3, Blender, Git, and general production workflows, so I can communicate well across technical, design, and asset-related parts of a project. My Upwork history includes shipped mobile games, Unity ports, long-term production work, WebGL builds, prototypes, gameplay systems, and production support across desktop, mobile, and browser platforms. I work best with clients who want a practical developer who can think through both the technical implementation and the game design direction.

  • Game Development
  • Game Design
  • Unity
  • C#
  • Unreal Engine
  • Performance Optimization
  • Game Mechanics
  • Game Prototype
  • Mobile Game
  • WebGL
  • Godot
  • Construct 3
  • Game UI/UX Design
Naru O.

Takasaki, Japan

$18/hr
5.0
4 jobs

I am a native Japanese translator specializing in Japanese-English and English-Japanese translation, with a background in Information and Communication Engineering and hands-on experience in PC game development (planning and programming). My technical knowledge allows me to handle game localization, software UI translation, and tech-related content with precision and natural expression. I also have experience as a freelance Japanese writer and editor, ensuring high-quality, culturally accurate output. I use industry-standard tools including DeepL and CAT tools to deliver fast, accurate translations. Whether you need game scripts, technical documents, or creative content localized, I bring both linguistic skill and technical understanding to every project.

  • Japanese
  • English to Japanese Translation
  • Japanese to English Translation
  • Translation
  • Typing
  • Proofreading
  • Editing & Proofreading
  • Game Testing
Ismael M.

Saitama, Japan

$26/hr
5.0
2 jobs

💡 Got a game or app idea? I'll build it right, fast, and clean. I'm Isma, a game programmer and developer with 7+ years of experience turning ideas into polished 2D/3D games and interactive apps, built with Unity, Godot, and across web and mobile. What I do: 🎮 Game development (Unity & Godot, 2D & 3D) 📱Mobile apps (Android & iOS) 🌐 Web & desktop applications ⚡ Performance optimization & bug fixing 🚀 Prototyping & MVPs If you want someone who can handle both the creative and technical sides, and deliver polished, reliable results, I'd love to chat!

  • Unity
  • Godot
  • C#
  • AR & VR
  • Meta Quest
  • FMOD
  • C++
  • Python
  • Android
  • Java
  • Angular
  • Vue.js
  • TypeScript
  • JavaScript
  • Linux
  • Firebase
Richard C.

Saitama, Japan

$44/hr
5.0
38 jobs

I have over 15 years of experience with Unity3D. Over the last 15 years I have developed a wide range of mobile apps including iPhone & Android games. I am currently game developer working mostly with Unity game engine, covering multi-platform. Experienced on gameplay, rewards system, user interface, accelerometer, social media/game centre integration, augmented reality, advance lightning, shadows casting, in-app purchases, iAds, Mopub, Admob, Chartboost, RevMob and many other SDK integration with Unity. I also have experience in submit your app to Apple app-store, Google Play or Amazon app-store. Through my years of work in the game field, I acquired a good knowledge about technique be it code implementation or graphical asset optimization. So whatever project you have in the game field, I will be happy to contribute to it. I love what I'm doing daily, and I'm dedicated to my work.

  • Unity
  • Lua
  • C++
  • C#
  • PHP
  • Android App Development
  • iOS Development
Naoya M.

Ichinoseki, Japan

$20/hr
5.0
2 jobs

Web & Game Developer | JavaScript & PHP Expert | LAMP Stack Specialist | API & Cloud Enthusiast | Japanese language skills(Native Speaker) Hello! I’m a highly skilled Web & Game Developer with a strong background in JavaScript and PHP. I specialize in web applications, game development, and tool creation, with expertise in both front-end and back-end technologies. My goal is to provide efficient, scalable, and high-quality solutions tailored to my clients’ needs. 🔹 What I Do Best: • Web Development: JavaScript (Three.js, Node.js, Vue.js), PHP (LAMP stack – my core strength) • Game Development: Godot, Blender • API Development & Integration: RESTful APIs, authentication, cloud storage solutions • Cloud & Server Management: Plesk, ConoHa, AWS basics 🔹 Real-World Experience: I’m currently working with a major logistics company to develop and maintain a mission-critical online reception form system, built using the LAMP stack (Linux, Apache, MySQL, PHP). This project has been ongoing and showcases my ability to deliver stable, secure, and scalable web solutions for high-demand industries. 🔹 Why Work With Me? ✅ Detail-Oriented & Efficient: Clean, maintainable code with optimized performance ✅ Creative & Problem-Solving Mindset: Strong analytical skills for tackling complex issues ✅ Reliable & Communicative: Clear updates, timely delivery, and smooth collaboration I’m currently expanding my skills in API development, cloud computing, and cybersecurity to provide even more value. and, I'm a native Japanese speaker with excellent verbal skills. I can provide clear Japanese narration, translation, and explanatory services in addition to my technical expertise. Let’s connect and build something great together!

  • Web Development
  • Script
  • Web Application
  • Product Development
  • API
  • LAMP Administration
  • LAMP Stack
  • JavaScript
  • WordPress
  • jQuery
  • Node.js
  • Three.js
  • XOOPS
Ilia K.

Tokyo, Japan

$40/hr
5.0
1 jobs

I help indie developers and small studios turn game ideas into playable prototypes quickly. Making games since 2016, I've shipped titles on Steam and Google Play Store, and won a gold award at the HAL Tokyo Game Jam. I'm currently studying game programming at HAL Tokyo, one of Japan's top game development schools. What I'm good at: - Building prototypes and game mechanics quickly in Unity - Taking a concept from idea to playable in days, not weeks If you have a game idea that needs to become real, feel free to contact me.

  • Game Development
  • Unity
  • Mobile Game Development
  • Godot
  • Mobile Game
  • App Development
  • Swift
  • iOS Development

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