Senior Core Engineer

Unity

. Own and evolve critical subsystems across the engine stack, from low-level C++ to high-level C# APIs across editor, build, and runtime code .

Posted 9/17/2026full-timeRemote • California • United StatesSenior💰 $135,800 - $258,600 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in designing and implementing high-performance APIs and systems for game engines, with a strong focus on C++ and C#. Proficient in multithreading, resource management, and real-time network protocols to ensure efficient execution and synchronization in complex environments.

Highest-signal resume keywords

C++ ProgrammingC# ProgrammingMultithreadingGame Engine DevelopmentNetwork Protocols

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Hard Skills

API DesignPerformance ProfilingMemory LayoutDeterminismSimulation ConsistencyCompressionStreamingRPCsLock-Free TechniquesUnity DOTS

Soft Skills

Problem SolvingDebuggingCollaboration

Tools & Technologies

MCP-Style Tool InterfacesMachine LearningAgentic Workflows

Industry Keywords

Game Engine CoresMiddlewareReal-Time Interactive SystemsPhysicsAnimationInputAssets

Tech Stack

Tools & technologies

UnityC++

About the role

Key responsibilities & impact

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, serialization, and synchronization of components and assets in bandwidth- and latency-constrained environments
Design systems that allow Unity to load, run, and synchronize assets when it does not own the main loop
Build fundamental infrastructure for interconnected game and 3D ecosystems

Requirements

What you’ll need

Experience building or fundamentally extending game engine cores, middleware, or foundational systems
Ability to design modular, testable systems and implement and debug them end-to-end
Strong C++ and C# skills
Practical understanding of CPU caches, branch behavior, memory layout, and profiling
Hands-on experience across multiple engine domains, such as physics, animation, input, and assets
Familiarity with compression, streaming, replication, authority models, RPCs, state diffing, delta encoding, or network protocols for real-time interactive systems
Experience with determinism, replay systems, and simulation consistency
Deep knowledge of multithreading, job systems, lock-free techniques, and/or Unity DOTS
Experience with MCP-style tool interfaces, training data generation, machine learning, or agentic workflows
Sufficient knowledge of English for professional verbal and written exchanges

Benefits

Comp & perks

Equity awards
Participation in company incentive plans, such as annual discretionary bonuses or sales commissions
Comprehensive health, life, and disability insurance
Commute subsidy
Employee stock ownership
Competitive retirement/pension plans
Generous vacation and personal days
New-parent 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