Viacheslav K.Private profile: Upwork shows its earnings only to signed-in members, so we check it every few weeks, not daily. MRR here is a rough estimate (Upwork's six-month earnings ÷ months active). Last read Nov 5, 2026.

Unity game application developer with 11 years of commercial experience. I build mobile, PC, VR and Web games and apps in Unity, C#. from prototype to App Store, Google Play, Steam release. Shipped a worldwide Top Seller and a mobile game with 1M+ downloads. UNITY GAME DEVELOPMENT Full-cycle game development in Unity 3D: core gameplay, game mechanics, UI, meta systems, progression, in-game economy, inventory, quests and shops. I work on new projects, join existing Unity codebases mid-development, and take over projects other developers left unfinished. MULTIPLAYER GAME DEVELOPMENT Real-time and turn-based multiplayer using Photon (PUN, Fusion, Quantum), Mirror, FishNet, Nakama and SmartFoxServer. Server-authoritative gameplay, matchmaking, lobbies, anti-cheat, and backend on Firebase, PlayFab, AWS, Node.js and ASP.NET. GAME OPTIMIZATION AND PERFORMANCE Unity performance optimization for mobile and low-end Android devices through real CPU/GPU profiling — not guesswork. 30-60% FPS improvement, lower memory usage, faster loading times. Up to 90% build size reduction using thin-client architecture and remote asset delivery with Addressables. MOBILE GAME DEVELOPMENT AND LIVEOPS iOS and Android game development, App Store and Google Play submission, IAP, ads and monetization (LevelPlay), analytics, remote config, A/B testing, live events and content updates after launch. GENRES SHIPPED Mobile and PC RPG, multiplayer CCG, PC and WebGL FPS, mobile idle game, VR games for Oculus Quest, and MMORPG. Teams from 3-person indie studios to AA studios with 100+ developers. TOOLS AND TECHNOLOGIES Unity: DOTS/ECS, Addressables, Zenject, Odin Inspector, UniTask, DOTween, UMA, Dialogue System, Facepunch.Steamworks Multiplayer: Photon PUN, Photon Fusion, Photon Quantum, Mirror, FishNet, Nakama, SmartFoxServer Backend and services: Firebase, PlayFab, AWS, Node.js, ASP.NET Platforms: iOS, Android, Steam, WebGL, Oculus Quest, Meta Quest Languages: C#, JavaScript, TypeScript, GoLang HOW I WORK Clean, documented, modular code following SOLID, KISS and DRY. I tell you what is actually wrong, including when the answer is "this does not need rebuilding." I estimate honestly and raise scope problems early, and I hand over a codebase your next developer can pick up without me. Send me your project details, a build, or your repo. I will tell you what I would do and what it takes, before you commit to anything.