Senior Rendering Engineer — Unreal 5 Lighting & FX Lead

mobentertainment; United States; On-site; USD 135,000 - 184,000; Full time

Job summary

Mob Entertainment, the studio behind Poppy Playtime, seeks a Rendering Engineer to push visual fidelity in Unreal Engine 5. You’ll join Core Engineering to build, optimize, and maintain rendering systems and visual pipelines that define lighting, materials, and post-process effects.

You’ll collaborate with environment artists and tech leads on World Partition, GPU Lightmass, and Lumen decisions, profile performance, resolve rendering issues, and help enforce the studio’s fidelity standards

Qualifications

• 7+ years of professional experience as a rendering/graphics engineer with at least one shipped title using Unreal Engine.
• Strong C++ skills and deep understanding of Unreal's rendering pipeline (RDG, shader compilation, material system).
• Experience with HLSL shader authoring and debugging rendering issues using tools like RenderDoc or Unreal Insights.
• Practical experience with UE5 lighting systems - World Partition, GPU Lightmass, Lumen, and the tradeoffs between them.
• Ability to communicate rendering constraints and tradeoffs clearly to artists and designers.

Responsibilities

• Develop, extend, and optimize rendering features and shaders in Unreal Engine 5.
• Own lighting strategy decisions with environment art and lead engineering - including World Partition, GPU Lightmass, and Lumen tradeoffs.
• Profile and optimize GPU/CPU rendering performance against defined platform targets and fidelity standards.
• Diagnose and resolve rendering bugs, visual artifacts, and platform-specific rendering issues across target hardware.
• Build and maintain internal tooling to support artists and engineers working with rendering systems (profiling visualizers, lighting validation tools).
• Collaborate closely with technical artists on shader authoring standards, material complexity budgets, and visual fidelity guardrails.

Skills

Unreal Engine rendering

C++

Shader development

Performance profiling

Cross-team collaboration

GPU/CPU optimization

Tools

RenderDoc

Unreal Insights

Perforce

UGS/Horde

Job description

Mob Entertainment, the studio behind Poppy Playtime, seeks a Rendering Engineer to push visual fidelity in Unreal Engine 5. You’ll join Core Engineering to build, optimize, and maintain rendering systems and visual pipelines that define lighting, materials, and post-process effects.

You’ll collaborate with environment artists and tech leads on World Partition, GPU Lightmass, and Lumen decisions, profile performance, resolve rendering issues, and help enforce the studio’s fidelity standards