Senior Software Engineer, 3D Systems & AI

Unity; Oregon (WI); On-site; USD 130,000 - 196,000; Full time

Benefits offered by this job

Health, life, and disability insurance

Employee stock ownership

Generous vacation and personal days

Retirement plans

Job summary

Unity is seeking a senior engineer to help advance visionOS support, Play-to-Device, and Record & Playback as we adapt PolySpatial to stream Unity content into other engines and 3D environments. You will work on protocols, media formats, and run-time systems bridging real-time 3D content across platforms.

You’ll contribute across core engine code and high-level APIs, focusing on performance, determinism, and cross-engine interoperability between engines and AI models.

Qualifications

• Core Engine Experience: experience building or extending engine cores, middleware, or foundational systems.
• AI Systems Fluency: practical experience integrating AI/ML into production software.
• Architecture & Execution: design modular, testable systems and ship end-to-end.
• High-Performance Coding: strong C++/C# skills with real-time systems considerations.
• Engine-Wide Breadth: experience across multiple engine domains (physics, rendering, etc.).

Responsibilities

• Define runtime protocols, formats, and execution models for encoding and replaying 3D content between engines and AI models.
• Own and evolve critical subsystems across the engine stack from C++ runtime to C# APIs.
• Build systems to capture, serialize, stream, and synchronize scene state and rendering data under tight constraints.
• Design interfaces for AI to inspect engine state and validate outcomes.

Skills

C++

C#

AI systems

Software architecture

Performance coding

Engine development

Job description

The opportunity

The team behind Unity’s visionOS support, Play-to-Device, and Record & Playback is growing as we prepare for something even more ambitious: adapting PolySpatial to stream Unity content into other game engines and 3D environments — in-process, cross-process, and over the network. We’re building systems that allow real-time 3D experiences to run, render, and interact in places they weren’t originally authored for, including other major game engines and emerging software platforms. We’re also developing new ways to encode and exchange interactive 3D content: protocols designed not only for rendering and interchange, but also for understanding, transformation, generation, and orchestration by future AI-driven tools and systems. You’ll help invent the protocols, media formats, and runtime systems that bring interactive 3D content to novel platforms. Working at the intersection of core engine technology, graphics, networking, distributed systems, media, and AI, you’ll help define the interchange layer for the next generation of interconnected games and intelligent 3D ecosystems.

The team behind Unity’s visionOS support, Play-to-Device, and Record & Playback is growing as we prepare for something even more ambitious: adapting PolySpatial to stream Unity content into other game engines and 3D environments — in-process, cross-process, and over the network. We’re building systems that allow real-time 3D experiences to run, render, and interact in places they weren’t originally authored for, including other major game engines and emerging software platforms. We’re also developing new ways to encode and exchange interactive 3D content: protocols designed not only for rendering and interchange, but also for understanding, transformation, generation, and orchestration by future AI-driven tools and systems. You’ll help invent the protocols, media formats, and runtime systems that bring interactive 3D content to novel platforms. Working at the intersection of core engine technology, graphics, networking, distributed systems, media, and AI, you’ll help define the interchange layer for the next generation of interconnected games and intelligent 3D ecosystems.

What You'll Be Doing

• Help define runtime protocols, formats, and execution models to encode, compress, and replay interactive 3D content between engines and AI models.
• Own and evolve critical subsytems across the engine stack, from low-level C++ runtime code to high-level C# APIs across editor, build, simulation, streaming, and playback.
• Build systems to capture, serialize, stream, and synchronize scene state, components, assets, user interactions, and rendering data under tight bandwidth, latency, determinism, and memory constraints.
• Design interfaces and feedback loops that allow AI systems to inspect engine state, invoke engine capabilities, and validate outcomes.

What We're Looking For

• Core Engine Experience: Experience building or fundamentally extending game engine cores, middleware, or foundational systems (e.g. serialization, build pipelines, memory subsystems).
• AI Systems Fluency: Practical experience integrating AI/ML into production software, including areas such as model training, data collection, evaluation loops, agents, tool use, or model-context protocols.
• Architecture & Execution: Ability to design modular, testable systems - then implement, profile, debug, and ship them end-to-end.
• High-Performance Coding: Strong C++ and C# skills, with practical understanding of CPU caches, memory layout, allocation patterns, branch behavior, profiling, and performance tradeoffs in real-time systems.
• Engine-Wide Breadth: Hands-on experience across multiple engine domains — such as physics, animation, input, rendering, assets, or build systems — and how they interact.

You might also have

• Experience building infrastructure for training data generation, synthetic data, simulation environments, evaluation harnesses, reinforcement learning, or agentic workflows.
• Familiarity with 3D data formats and spatial content pipelines, such as USD, glTF, procedural generation, or semantic scene representations.
• Experience with MCP-style tool interfaces, LLM agents, multimodal models, inference pipelines, embeddings, vector search, or AI systems that inspect and act on structured application state
• Knowledge of compression, streaming, replication, authority models, RPCs, state diffing, delta encoding, or network protocols for real-time interactive systems.
• Experience with determinism, replay systems, simulation consistency, multithreading, job systems, lock-free programming, Unity DOTS, or other data-oriented runtime architectures.

Additional Information

• Relocation support is not available for this position
• Work visa/immigration sponsorship is not available for this position

$130,400.00 - $195,600.00

This range reflects the anticipated base salary for this position. Beyond base salary, this role may be eligible for equity awards and participation in our company incentive plans (such as annual discretionary bonuses or sales commissions). The final offer amount will depend on several factors, including geographic location and the candidate’s relevant experience, professional background, and skill set.

Benefits

• Comprehensive health, life, and disability insurance
• Commute subsidy
• Employee stock ownership
• Competitive retirement/pension plans
• Generous vacation and personal days
• Support for new parents through leave and family-care programs
• Office food snacks
• Mental Health and Wellbeing programs and support
• Employee Resource Groups
• Global Employee Assistance Program
• Training and development programs
• Volunteering and donation matching program

Life at Unity

Unity [NYSE: U] is the world’s leading game engine, powering play for more than 3 billion consumers each month. The top mobile games in the world, the most played PC indie titles, the most innovative console games, and virtually all of the top XR and Web Games are developed, deployed, and grown in Unity. Unity also enables teams across industries like automotive, manufacturing, and healthcare to design, simulate, and collaborate in 3D — closing the gap between ideas and reality. For more information, please visit www.unity.com.

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This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language since the performance of the duties related to this position requires frequent and regular communication with colleagues and partners located worldwide and whose common language is English.

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