Senior UE5 C++ Gameplay Engineer

Job description

We are looking for a Senior UE5 C++ Gameplay Engineer. If you are looking to give your career a real boost with a global leader in digital transformation, EPAM is the perfect choice. If you'd like to learn more about this position and project, apply now.

Responsibilities

- Design and develop UE5 C++ plugins and modules with runtime plugin architecture, including Build.cs configuration and module dependencies

- Implement real-time audio streaming systems using USoundWaveProcedural, including PCM buffering, resampling, sample-rate/audio-format handling, underrun mitigation, and latency tuning

- Integrate WebSocket and streaming protocols in C++ with persistent session management, JSON-based event protocols, reconnection strategies, and backpressure handling

- Integrate LLM / Conversational AI voice systems including TTS and STT, prompt and session design, turn-taking systems, and latency investigation/debugging

- Architect event-driven systems using decoupled delegates, event bus patterns, Unreal subsystems, and cross-system integration

- Implement MetaHuman runtime lip-sync systems, audio-to-viseme pipelines, and feed streamed audio into facial animation

- Work with embedded Lua scripting and a Lua-driven data and logic layer, including C++/Lua bridge architectures

- Perform audio and network debugging/profiling, including tracing raw protocol events and diagnosing audio quality, latency, and streaming issues

Requirements

- Strong experience with UE5 C++ plugin/module development, runtime (non-editor) code, plugin boundaries, and integration patterns

- Proven expertise in real-time audio streaming in Unreal Engine (USoundWaveProcedural, PCM buffering, resampling, sample-rate and audio-format handling, underrun mitigation, and latency tuning)

- Hands-on experience with WebSocket / streaming protocol integration in C++, including persistent session management, JSON-based event protocols, reconnection strategies, and backpressure handling

- Experience with LLM / Conversational AI voice systems: TTS and STT integration, prompt and session design, turn-taking systems, and latency debugging

- Solid understanding of event-driven architecture: decoupled delegates, event bus patterns, Unreal subsystems, and cross-system integration

- Experience with MetaHuman integration, runtime lip-sync systems, audio-to-viseme pipelines, and feeding streamed audio into facial animation

- Proficiency with embedded Lua scripting, experience working with a Lua-driven data and logic layer, and familiarity with C++/Lua bridge architectures

- Strong audio and network debugging/profiling skills: tracing raw protocol events, diagnosing audio quality issues, and diagnosing latency and streaming issues

- Experience with libwebsockets is a plus

Nice to have

- Experience with StateTree in Unreal Engine

- Background in gameplay systems and components

- Knowledge of multiplayer replication

- Proficiency with Blueprints

- Experience with animation systems