Harpreet S.

Most developers can build your game. I build the systems that keep it running after launch. A great prototype wins a demo. A production-ready architecture wins players, retention, and long-term scalability. I develop multiplayer, VR/AR, Roblox, and cross-platform games in Unity and Unreal Engine (UE4/UE5), with a focus on networking, performance optimization, and production-ready engineering. Whether you're building for PC, mobile, console, WebGL, or Meta Quest, I deliver stable, maintainable systems that perform under real-world conditions. Core Expertise Multiplayer Systems Photon Fusion/PUN, Mirror, FishNet, Unity NGO, Steamworks, AWS GameLift, PlayFab, Nakama Built scalable multiplayer architectures supporting 10,000+ concurrent players Low-latency gameplay with synchronized state and reliable matchmaking Dedicated server, lobby, party, voice, progression, and backend integration. VR & AR Development Meta Quest 2/3/Pro, OpenXR, Hand Tracking, Passthrough, ARKit, ARCore, MRTK Optimized immersive experiences with stable 72 FPS on Quest Enterprise training, simulation, education, and interactive experiences Cross-platform deployment across standalone VR and mobile AR. Unity Development C#, gameplay systems, UI/UX, Addressables, AI, physics, save systems Modular, maintainable architecture built for long-term expansion Faster loading, optimized memory usage, and production-ready workflows. Unreal Engine C++, Blueprints, Gameplay Ability System, AI, replication, cinematics High-performance multiplayer gameplay Networked gameplay with optimized replication and scalable architecture. Roblox Development Luau, combat systems, RPGs, simulators, tycoon, social multiplayer, monetization Robust gameplay systems with reliable DataStores Monetization designed around player retention instead of interruptions Live-service architecture built for long-term growth. Performance Engineering CPU/GPU profiling, memory optimization, draw-call reduction, bandwidth optimization Smooth gameplay across desktop, mobile, VR, and console Optimized builds without sacrificing visual quality. Selected Projects Helium Wars Real-time multiplayer strategy game built on dedicated servers. 10,000 concurrent players Stable matchmaking and ranking system Zero production server crashes during major live operations. Nova Clash UE5 multiplayer shooter using C++ and Gameplay Ability System. Stable 60 FPS 32-player multiplayer with AI-driven combat Optimized replication and networking. Enterprise VR Training Meta Quest training platform using OpenXR and hand tracking. Deployed across 2,000+ enterprise headsets Performance optimized from 45 FPS to a locked 72 FPS. Healthcare Simulation Controller-free VR medical training. High-precision gesture recognition Successfully adopted for real-world training environments. Metaverse Experience Cross-platform social experience for PC, Quest, and mobile. Thousands of simultaneous users Avatar systems, cosmetics, and multiplayer interactions. Roblox Tycoon Simulator Large-scale Roblox experience featuring progression and monetization. Millions of player sessions Reliable trading, economy, and progression systems Stable live-service infrastructure. My Development Process Architecture First Every project begins with identifying technical risks, selecting the right networking model, and designing scalable systems before development starts. Iterative Development Playable milestones are delivered regularly, providing continuous visibility into progress and eliminating late-stage surprises. Optimization Throughout Performance is treated as part of development—not something postponed until the end. Launch & Beyond Documentation, clean Git history, deployment support, and post-launch stabilization ensure your project is ready for production. Why Clients Choose Me Production-ready engineering—not prototype code Multiplayer architectures built for scale and stability VR/AR experiences optimized for certification and performance Clean, maintainable code that teams can confidently extend Transparent communication with consistent milestone updates Strong focus on long-term scalability, maintainability, and player experience. Technical Stack Game Engines Unity • Unreal Engine 4/5 • Roblox Studio Languages C# • C++ • Luau • Blueprints • HLSL Networking Photon Fusion • Photon PUN • FishNet • Mirror • Unity NGO • Steamworks • PlayFab • AWS GameLift • Nakama VR / AR Meta Quest • OpenXR • Oculus SDK • Hand Tracking • Passthrough • ARKit • ARCore • MRTK • AR Foundation Optimization Unity Profiler • Unreal Insights • RenderDoc • LOD Systems • Occlusion Culling • Memory Profiling • Asset Streaming DevOps GitHub • GitLab • Perforce • Jenkins • GitHub Actions • Jira • Trello Deployment Steam • Meta Quest Store • App Lab • iOS • Android • WebGL • Roblox • PlayStation Development Kits