Senior Engine Architect: Real-Time Systems & Tools

LEGO Digital Play; Greater London; On-site; GBP 90,000 - 140,000; Full time

Job summary

LEGO Digital Play is shaping the future of digital play by taking inspiration from the LEGO Brand’s System in Play and reimagining it for the digital world. Our portfolio is built on a foundation of safety that will ultimately inspire the builders of tomorrow.

We are looking for a Senior Engineer – Engine to help design and build our core runtime technology. This role is highly hands-on and focused on the implementation of critical engine systems, including simulation, performance optimization,

Qualifications

• Proven experience building engine components or extending engine capabilities.
• Expertise in low-level engine programming, performance, and multithreading.
• Experience with game engines and their editor/tooling layers.
• Strong debugging, profiling, and performance optimization skills.
• Familiarity with automated testing, CI, and performance validation pipelines.
• Ability to work collaboratively in fast-paced engineering environments.

Responsibilities

• Design and implement core engine systems, including runtime architecture and simulation.
• Develop and optimize simulation, physics, and rendering across platforms.
• Build server-authoritative architectures enabling efficient client/backend simulation.
• Create tooling such as editors, inspectors, debuggers, profilers, and asset pipelines.
• Work across low-level and high-level environments, bridging engine runtime and backend services.
• Collaborate with platform teams to ensure seamless integration and deployment.

Skills

Game engine development

Systems programming

Performance optimization

Multithreaded architectures

Debugging and profiling

Editor and tooling

CI / automated testing

Tools

Editors

Asset pipelines

Build pipelines

Profilers

Debugging tools

Job description

LEGO Digital Play is shaping the future of digital play by taking inspiration from the LEGO Brand’s System in Play and reimagining it for the digital world. Our portfolio is built on a foundation of safety that will ultimately inspire the builders of tomorrow.

We are looking for a Senior Engineer – Engine to help design and build our core runtime technology. This role is highly hands-on and focused on the implementation of critical engine systems, including simulation, performance optimization,