Online Physics Sync Engineer (Unreal Engine 5 / Sports)

Refactor Games; Santa Monica (CA); On-site; USD 90,000 - 120,000; Full time

Job summary

A modern game development studio in Santa Monica is seeking an Online Physics Sync Engineer to enhance multiplayer soccer gameplay with precise physics synchronization. The ideal candidate should have over 5 years of experience in networked gameplay systems and a strong proficiency in C++. Join us to build the future of sports gaming with cutting-edge technology in a collaborative environment.

Qualifications

• 5+ years engineering multiplayer or networked gameplay system.
• Deep understanding of UE5’s replication framework and Chaos Physics.
• Experience with client-side prediction and rollback architecture.

Responsibilities

• Ensure deterministic gameplay by synchronizing physics.
• Debug client/server physics divergence and state mismatches.
• Optimize for variable latency environments.

Skills

C++

Networked gameplay systems

Debugging networked simulation bugs

Linear algebra

Vector math

Quaternions

Job description

1 month ago Be among the first 25 applicants

Refactor Games is a AAA sports video game studio . We are developing the next generation of professional football (soccer) video games using Unreal Engine 5 . We’re building fast, reactive multiplayer soccer with real-time physics and no desync.

We’re looking for an Online Physics Sync Engineer who can ensure that gameplay feels deterministic and responsive, whether you're 5ms or 100ms from the server. You’ll work at the intersection of Chaos Physics, replication, prediction, and rollback—all tuned specifically for soccer gameplay where precision matters.

You'll Work On:

• Frame-accurate synchronization of ball, player, and tackle physics in multiplayer
• Deterministic prediction and rollback for input, collisions, and interactions
• Network replication for physics-assisted animation and ragdoll systems
• Latency compensation for ball control, passing, and first-touch moments
• Debugging client/server physics divergence and state mismatches
• Building lightweight state snapshots and reconciliation systems
• Optimization for variable latency environments (LAN, 60ms+, jitter)

Requirements:

• 5+ years engineering multiplayer or networked gameplay system.
• Deep understanding of UE5’s replication framework and Chaos Physics
• Experience with client-side prediction and rollback architecture
• Proficiency in C++ and debugging networked simulation bugs
• Strong math skills (especially linear algebra, vector math, quaternions)

Bonus Points:

• Built multiplayer sports, fighting, or racing games (any tight-input genre)
• Prior work on deterministic physics engines or peer-reviewed rollback
• You care about the milliseconds between a tackle and the ball snapping away

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Full-time

Job function

• Job function

  Marketing, Public Relations, and Writing/Editing

• Industries

  Computer Games

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