Simulation Engineer

Rocket Science Group•Albany, NY

3d•Hybrid

About The Position

Atomic Theory, part of the Rocket Science Group, is a multinational team of seasoned AAA veterans with roots extending from Blizzard, PUBG, Epic, and Unity. We have a proven track record of delivering player-centric, AAA-quality experiences, and we are unwavering in our commitment to performance, accessibility, and the engineering frameworks that underpin exceptional gameplay. Atomic Theory is more than just a studio — it's a collaborative space where diverse experiences intersect to solve the toughest challenges in modern game development. With offices in Albany NY, Cardiff UK, and Brighton UK, we thrive at the opportunity to Get Sh!t Done on a global scale. We are seeking a C++ / Simulation Engineer to drive the performance, architecture, and migration efforts of our simulation projects. In this role, you will migrate existing systems to C++, implement Flecs ECS patterns, and optimize simulation performance to support large-scale, multi-server environments. You will be responsible for the core simulation logic that powers our partners’ interactive experiences. An ideal candidate is passionate about games, enjoys tackling a wide range of technical challenges, and has a track record of delivering great player and customer experiences across different areas of game development.

Requirements

Professional experience with modern C++ (C++17/20), with a focus on performance and memory management.
Proficiency with Entity Component System architectures, preferably with Flecs.
Solid understanding of linear algebra, physics, and simulation mathematics.
A commitment to writing clean, testable, and efficient code.
Ability to debug complex state issues and optimize performance-critical code paths.
Comfort working across different systems and disciplines within game development, with a generalist mindset.
Strong communication skills and the ability to work collaboratively with engineers, designers, producers, and project leads.
A proactive and thoughtful approach to identifying, diagnosing, and resolving technical challenges.
A genuine enthusiasm for games and a desire to help create engaging, high-quality experiences for players.
Curiosity and eagerness to learn new technologies, engines, and practices to remain adaptable and effective.

Nice To Haves

Familiarity with Godot/GDScript to assist in migration efforts.
Experience with networking, state synchronization, or multi-server architectures.
Advanced knowledge of concurrency, lock-free data structures, and parallel processing.
Experience supporting or mentoring less experienced developers as they build new skills.
Experience working with internal or external partners to gather feedback, provide technical input, and solve problems collaboratively.

Responsibilities

Identify and migrate under-performing GDScript systems to C++ for improved performance and maintainability.
Design and implement simulation logic using the Flecs ECS framework, ensuring efficient data locality and scalability.
Profile simulation workloads, identify bottlenecks, and apply multithreading techniques to optimize frame time.
Develop robust serialization and state replication systems for distributed simulation support.
Collaborate with the team to break down complex simulation requirements and deliver practical, high-performance solutions.