Riken S.

🏆 Top Rated Plus Senior Unity 3D/2D Game Developer & XR Software Engineer with 9+ years of experience in Unity software development and video game development. I have built and shipped 150+ games and interactive 3D applications—including 75+ projects and 10,000+ hours right here on Upwork with a 100% Job Success Score and zero disputes. ✅ 9+ Years in Unity 3D & Unity 2D (C#) Game Development ✅ 150+ Shipped Games (Mobile, PC, VR/AR/MR, Multiplayer, WebGL) ✅ 10,000+ Upwork Hours | 75+ Completed Upwork Contracts | 100% JSS ✅ Trusted by US, Canadian & Global Publishers (Kob Games, Random Logic Games, Epoxy Studios) 🤝 Why Clients Hire Me: I write clean, scalable C# code and I communicate clearly in fluent English. No ghosting, no surprises, and no messy handoffs. You get daily progress updates, fast responses, and a production-ready build that works exactly how you need it to. 🎯 WHAT I BUILD 📱 Mobile Game Development (iOS & Android | Unity 2D & 3D) Complete Unity mobile game development from Game Prototype, Proof of Concept (PoC), or MVP to global App Store and Google Play publishing: • Core Gameplay, polished UI/UX implementation, 2D/3D animations (Spine, Timeline, Animator), particle effects, and responsive touch controls. • Performance-optimized builds that run smoothly at 60/120 FPS even on lower-end Android and iOS devices. • Monetization & Ad Mediation: AdMob, Unity Ads, AppLovin MAX, IronSource (LevelPlay), and In-App Purchases (IAP) with server-side receipt validation. • Analytics & LiveOps: Firebase Analytics, GameAnalytics, Adjust, and AppsFlyer connected from day one. 🥽 VR, MR & Spatial Computing (Meta / Oculus Quest 2/3/Pro, OpenXR, SteamVR, HTC Vive, Apple Vision Pro) Dedicated Unity VR/AR/XR developer and Meta Quest developer for standalone VR and PCVR: • Immersive VR Mechanics: Meta XR SDK, OpenXR, XR Interaction Toolkit, hand tracking, physics grab mechanics, teleportation/locomotion, spatial audio, haptic feedback, and Mixed Reality (MR) full-color passthrough. • Enterprise VR Training & 3D Simulations: Virtual reality software development for industrial safety training, medical simulations, serious games, digital twins, and real-time 3D visualization optimized for a locked 72/90/120 FPS. 📲 Augmented Reality (AR) App Development (ARKit, ARCore & ARFoundation) Experienced AR developer building mobile augmented reality apps for retail, real estate, healthcare, education, and interactive marketing: • Markerless surface/plane detection, 3D product visualization, object placement, image tracking, face tracking, WebAR, and location-based GPS AR apps. 🌐 Online Multiplayer & Real-Time Networking Scalable multiplatform multiplayer game development using Photon (Photon Fusion, PUN2 & Quantum), Mirror, Unity Netcode for GameObjects (NGO), FishNet, Agora (Voice/Video), and custom WebSocket backends: • Lobbies, matchmaking, chat, authoritative state sync, client-side prediction, lag compensation, and anti-cheat systems. 🖥️ PC, Mac & Steam Video Game Development (Windows, macOS, Linux) • Full Steamworks SDK integration: achievements, cloud saves, leaderboards, matchmaking, and Steam Overlay. • High-fidelity graphics using URP and HDRP rendering pipelines, custom Shader Graph, VFX Graph, Cinemachine, and post-processing. 🌍 WebGL, HTML5 Browser Games & Cross-Platform Game Porting • Lightweight, fast-loading WebGL browser games optimized for smooth desktop and mobile browser gameplay without plugins. • Complete game porting across Mobile (iOS/Android), PC/Mac, WebGL, and VR headsets. ⚡ WHERE I STAND OUT 🚀 Performance Optimization & Profiling (My Strongest Skill) I take games from laggy or unplayable to a smooth 60/90 FPS with documented results. Using Unity Profiler, Memory Profiler, Frame Debugger, and GPU Profiler, I fix overdraw, optimize shaders, implement object pooling and Addressables, reduce draw calls, and eliminate GC memory spikes. 🔧 Bug Fixing, Code Audits & Project Rescue Many clients hire me after a bad experience. I read unfamiliar C# codebases quickly, fix critical bugs and store rejections, and refactor messy architecture using SOLID principles so your project has a future. 🛠️ Custom C# Game Systems & AI Integration Inventory, save/load systems, character controllers, dialogue systems, AI behavior trees, state machines, OpenAI/ChatGPT conversational NPCs, custom level editors, and reusable Unity Editor tools. ☁️ Backend, SDK & API Integration Firebase, PlayFab, AWS, or custom REST APIs for authentication, cloud saves, leaderboards, push notifications, Remote Config, and A/B testing. ⭐ WHAT CLIENTS SAY 💬 "Fantastic developer. We'll use him again for future projects!" — Random Logic Games, US 💬 "Very professional. Will definitely collaborate again." — Kob Games 💬 "Highly understanding with feedback. Works in a timely fashion. Great work!" — Epoxy Studios, Canada 🕹️ Games Built: Hyper-Casual, Casual, Puzzle, RPG, Action, 3D Simulation, Serious Games, Educational,