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 9/16/2026full-timeRemote • California • United StatesSenior💰 $135,800 - $258,600 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in building and extending game engine cores and middleware, with a strong focus on C++ and C# programming. Capable of designing modular systems and optimizing performance in complex, resource-constrained environments.

Highest-signal resume keywords

C++ ProgrammingC# ProgrammingGame Engine DevelopmentMultithreading and Job SystemsNetwork Protocols

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Game Engine Core DevelopmentAPI Design and ImplementationPerformance OptimizationMemory Layout and ProfilingDeterminism and Replay SystemsCompression and Streaming TechniquesLock-Free TechniquesUnity DOTSDebugging and TestingCross-Process Communication

Soft Skills

Problem SolvingCollaborationCommunication

Tools & Technologies

UnityMCP-Style Tool InterfacesMachine LearningAgentic Workflows

Industry Keywords

Embedded SystemsReal-Time Network ProtocolsSimulation ConsistencyResource Contention ManagementChange Tracking

Tech Stack

Tools & technologies

AssemblyDistributed SystemsUnityC++

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, serializing, and synchronizing components and assets in bandwidth- and latency-constrained environments
Build fundamental infrastructure for interconnected game and 3D ecosystems
Enable Unity to run as a guest within other processes, engines, and distributed systems
Design systems that allow Unity to load, run, and synchronize assets when Unity does not own the main loop
Create extensible architecture and optimize performance at the assembly level

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 real-time network protocols
Experience with determinism, replay systems, and simulation consistency
Deep knowledge of multithreading, job systems, lock-free techniques, and/or Unity DOTS
Familiarity 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