Senior Gameplay Systems Engineer

Mob Entertainment

contract

Posted on: 9/4/2025

Location: 🇺🇸 United States

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Senior

About the role

Design, implement, and maintain gameplay systems using Flecs ECS and StateTree in Unreal Engine 5.
Author and manage ECS components, systems, and queries for scalable, data-driven gameplay features.
Refactor and stabilize existing MVP systems, resolving crashes, edge cases, and performance issues.
Collaborate with design and technical design teams to ensure systems are usable, extensible, and intuitive.
Build debug tools, diagnostic hooks, and testable runtime logic to improve cross-discipline workflows.
Take ownership of assigned systems from spec to final polish—without needing constant direction or support.
Provide light engineering support for areas such as QA tooling, telemetry, or porting, where applicable.
Reports to: Lead Engineer / Director of Technology.
Works with: Gameplay Designers, Technical Designers, QA, Production.
Primary Tech: Unreal Engine 5, Flecs, StateTree, C++, Perforce.
Contract Duration: Now through October 15th, 2025.

5+ years experience in gameplay or systems engineering roles on Unreal projects.
Deep familiarity with Flecs ECS or equivalent data-oriented frameworks.
Strong working knowledge of StateTree, blackboard logic, and gameplay state machines.
Proficiency in C++, especially within Unreal Engine’s gameplay architecture.
Ability to work independently and contribute meaningfully in a small, fast-moving team.
Strong problem-solving skills and experience improving system stability and clarity.
Experience developing QA tools, cheats, or test harnesses in Unreal. (Pluses)
Familiarity with crash reporting, telemetry, and analytics SDKs. (Pluses)
Exposure to porting workflows and platform-specific requirements. (Pluses)
Experience working on projects where systems needed to scale or evolve beyond MVP. (Pluses)