Senior Real-Time Engine Architect

ironSource; San Francisco (CA); On-site; USD 150,000 - 230,000; Full time

Job summary

Unity is seeking engineers to advance PolySpatial, Unity’s core tech for real-time 3D runtimes and interop across engines. You will own subsystems from C++ to C#, designing extensible APIs for embedded and networked configurations, while optimizing for low-latency execution.

Applicants should excel in high-performance coding, multi-engine breadth (physics, animation, assets) and have deep knowledge of serialization, memory layouts, and profiling.

Qualifications

• Experience building or extending game engine cores.
• Design modular, testable systems, then implement and debug them end-to-end.
• Strong C++ and C# skills with knowledge of CPU caches, branch behavior, memory layout, and profiling.

Responsibilities

• Own and evolve critical subsystems across the engine stack, from low-level C++ to high-level C# APIs across editor, build, and runtime code.
• Design and implement high-performance, extensible APIs for embedded, cross-process, and networked configurations.
• Develop schemes to manage execution timing and resource contention within or between processes and over the network with minimal overhead
• Orchestrate loading, change tracking, serializing, and synchronizing components and assets in bandwidth and latency-constrained environments.

Skills

Core Engine Experience

Architectural design

High-Performance C++/C#

Engine domains breadth

Job description

Unity is seeking engineers to advance PolySpatial, Unity’s core tech for real-time 3D runtimes and interop across engines. You will own subsystems from C++ to C#, designing extensible APIs for embedded and networked configurations, while optimizing for low-latency execution.

Applicants should excel in high-performance coding, multi-engine breadth (physics, animation, assets) and have deep knowledge of serialization, memory layouts, and profiling.