● Built and maintained Unreal Engine multiplayer systems in C++ and Blueprints, including parties, lobbies, matchmaking preparation, chat, reconnect flows, server travel, and player session management. ● Integrated PlayFab, Photon Realtime, AWS GameLift, GameFabric, Gameye, Steam, and EOS for authentication, sessions/lobbies, dedicated-server allocation, and backend-connected gameplay. ● Developed persistent guild/clan systems covering creation, membership, roles, invites/applications, metadata, UI, and guild wars with seasons, war windows, battle state, and backend configuration. ● Implemented Photon Realtime party and custom-lobby state outside gameplay replication, including ownership, ready states, public/private visibility, team/spectator updates, and real-time events. ● Debugged production networking, backend, cosmetic, loadout, UI, server-allocation, and map/server-travel issues using Unreal logs, backend logs, and player-session traces. ● Implemented Gameplay Ability System (GAS) workflows for modular gameplay abilities, attributes, effects, and ability-driven multiplayer interactions in Unreal Engine. ● Profiled and optimized Unreal Engine gameplay and multiplayer systems using Unreal Insights and built-in profiling tools, investigating CPU, network, and runtime performance bottlenecks.

● Implemented gameplay and UI features across client projects, including player housing/object placement validation, character customization, proximity voice chat, mirrors, vehicle interaction, and VR simulation controls. ● Built designer-friendly content workflows with Editor Utilities and Data Tables for customization, clothing conflicts, mesh replacement rules, and morph-target body customization. ● Developed multiplayer VR simulator interactions with replicated head/hand state, collision-based hand attachment, vehicle controls, driver/instructor roles, and Steam/LAN modes. ● Migrated and stabilized Unreal projects, including UE5.0 → UE5.4 upgrades, Enhanced Input/Mapping Context fixes, and third-party vehicle, traffic, and customization plugin integration. ● Reworked UMG screens for lobbies, character customization, vehicle/truck selection, map/weather selection, and backend-connected UI with animation states in collaboration with client teams.

● Developed Unreal Engine features and prototypes using C++, Blueprints, UMG, AI, combat, animation, and multiplayer systems. ● Implemented and debugged AI behavior using Behavior Trees, Blackboard, and PawnSensing while supporting gameplay and UI work on a larger multiplayer production project. ● Worked with Perforce and Git, reviewed existing production code, reproduced bugs, and collaborated with designers and developers to deliver client-requested changes.