Senior Core Engine Engineer
Company: Unity Software
Location: Campbell
Posted on: March 18, 2026
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Job Description:
The team that brought Unity to visionOS and enabled real-time
interaction via Play-to-Device is growing in preparation 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. Were looking for engineers
eager to help us invent how different real-time 3D runtimes
communicate and render under real-world constraints. You’ll work at
the intersection of core engine tech, high-performance networking,
distributed systems, and graphics. This is your opportunity to
build the fundamental infrastructure for the next generation of
interconnected game and 3D ecosystems You’ll implement the systems
that let Unity run reliably inside other processes, engines, and
environments. Youll own specific engine features–input, physics,
animation, audio, etc.–and make them work across boundaries (engine
to engine, editor vs runtime, C++ vs C#) while optimizing for
modularity, efficiency, and embeddability. If you like diving into
unfamiliar subsystems, solving interoperability puzzles, and
squeezing performance out of critical paths, you’ll have plenty of
opportunities here. What youll be doing • Implement and extend key
subsystems across the game engine stack, from low-level C++ engine
integrations to high-level C# APIs across editor, build, and
runtime code. • Profile and optimize execution timing and resource
contention within or between processes with minimal overhead •
Improve loading, change tracking, serializing, and synchronizing
components and assets in bandwidth and latency-constrained
environments. • Refactor engine code into decoupled modules
suitable for embedding and shared execution What were looking for •
Game Engine Experience: Youve developed or heavily modified game
engine cores, middleware, or foundation systems • High-Performance
Coding: Solid C++ and C# skills, with a working knowledge of
cache-friendly data layout, memory management, and real-time
optimization. • Versatility: Willing to jump into unfamiliar
areas—today a physics integration issue, tomorrow a serialization
bug • System Depth: Technical experience in at least one engine
area (physics, animation, input, assets, etc.) and how it interacts
with the rest of the engine You might also have • Experience with
WASM, embedded runtimes, or compiler pipelines (Mono, CoreCLR,
etc.). • Understanding of multithreading, job systems, lock-free
data structures, and/or Unity DOTS. • Experience solving
cross-platform issues across consoles, mobile, and desktop. •
Familiarity with networking concepts such as replication,
authority, and RPCs. Additional information • Relocation support is
not available for this position • Work visa/immigration sponsorship
is not available for this position Benefits At Unity, we want our
team members to thrive. We offer a wide range of benefits designed
to support well-being and work-life balance. Please note: Benefits
eligibility, specific offerings, and coverage vary based on the
country and employment status. While specific benefits vary, here
are some of the ways we strive to take care of our eligible team
members globally: 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
Keywords: Unity Software, West Sacramento , Senior Core Engine Engineer, IT / Software / Systems , Campbell, California
