Bogdan P.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 Jul 17, 2026.

Senior Game Systems Developer specializing in technical architecture and full-cycle production for high-performance PC, Mobile, and VR products. I provide expert-level engineering in Unreal Engine (C++) and Unity (C#), focusing on building scalable gameplay systems, robust multiplayer networking, and performance-critical simulations. I bridge the gap between initial concepts and production-ready games, delivering clean, documented code and modular systems that ready for long-term support and platform porting. Technical Expertise & Core Systems: ✅ Advanced AI & Unit Logic: Architecting complex NPC behaviors using Behavior Trees, State Machines, and Environmental Query Systems (EQS). Implementation of sensory systems (Perception), tactical group logic, and multi-threaded pathfinding for large-scale unit management. ✅ Scalable UI/UX Engineering: High-performance interfaces using Unreal Common UI and Unity UI Toolkit. Development of data-driven HUDs, modular inventory systems, and responsive layouts for Cross-Platform (Touch/Gamepad/Mouse) and Spatial UI for VR. ✅ Physics & Animation: Expert use of Control Rig, IK Rig, and Physics Assets. Building custom movement components, vehicle physics, and procedural animation systems that respond to gameplay triggers. ✅ Performance Engineering: Deep profiling and elimination of CPU/GPU bottlenecks. Optimization of draw calls, memory footprint, and shader complexity to maintain stable 90 FPS on Meta Quest 3 and high-end mobile devices. Production, Backend & Infrastructure: ✅ Multiplayer & Networking: Architecting Client-Server models with focus on Network Replication, prediction, and lag compensation. Expert integration of Photon (Fusion/Bolt), Mirror, and Epic Online Services (EOS). ✅ Backend & Data: Building secure communication with REST APIs, PlayFab, and Firebase. Implementation of matchmaking, global leaderboards, cloud saves, and secure player authentication. ✅ Porting & Release Prep: Preparing builds for Steam, PlayStation, and Meta Store. Ensuring full compliance with technical requirements (TRC/XR Checklist), native SDK integration, and input remapping for consoles. ✅ DevOps & Automation: Setting up CI/CD pipelines for automated builds, version control management (Git/LFS/Perforce), and auto-update systems like Velopack. Genres I work with: ✅ RTS & Strategy: Development of complex economy systems, production chains, and resource management logic. Expert in handling hundreds of active units with optimized pathfinding and group behavior rules (Factorio-style systems). ✅ RPG & Action: Implementation of deep character systems using Gameplay Ability System (GAS), including attributes, skill trees, inventory management, and complex combat mechanics. ✅ Shooters (FPS/TPS): Engineering precise projectile/hitscan systems, recoil patterns, weapon handling, and synchronized animations using Control Rig and ABP. ✅ Simulation & Racing: Physics-based vehicle handling, realistic environmental interactions, and high-fidelity industrial or medical simulations with haptic feedback integration. Technical stack: ✅ Engines: Unreal Engine 4.27 - 5.хх, Unity 2022/6. ✅ Languages: C++, C#, HLSL/Shaders. ✅ Unreal Tools: GAS, MetaHuman, Sequencer, PCG (Procedural Content Generation). ✅ Networking: EOS, Photon, Mirror, Dedicated Servers. ✅ Storage/Cloud: AWS, Azure, SQL/NoSQL, PlayFab. What Clients Hire Me For: ✅ MVP to Production: Rapid development of stable, playable prototypes that are built on a production-ready foundation. ✅ Technical Rescue: Auditing and refactoring legacy codebases, fixing critical bugs, and scaling systems left by previous teams. ✅ Independent Delivery: I take full ownership of the technical roadmap. No micromanagement needed - clean architecture and results first. Workflow & Reliability: ✅ Autonomy: I take full ownership of the technical roadmap and architecture, working independently within existing pipelines or building them from scratch. ✅ Refactoring & Scaling: Expert at auditing and restructuring existing codebases to improve stability, performance, and feature extensibility. ✅ Results-Oriented: I prioritize clean architecture and clear technical communication to deliver a product that is performant and maintainable. Clear communication, clean architecture, and results first. Ready to discuss the technical requirements of your project. Let’s connect.