Join the team who's helped build300+ games ranging fromCall of Duty, Halo, PUBG, and Bioshock You know the difference between client prediction and server reconciliation. You've debugged replication issues at 3 AM. You understand why a 16ms frame budget matters in competitive shooters.
We're Ironbelly Studios - 20+ industry veterans building our next multiplayer FPS in Unreal Engine 5. This is new system architecture from the ground up, not maintenance work.
The Mission Own the core gameplay architecture for a fully-funded competitive shooter targeting the hardcore PC FPS community. You'll architect systems handling thousands of concurrent players while maintaining the sub-16ms responsiveness that competitive players demand.
You Will Architect Multiplayer Systems
Design server-authoritative architecture with client prediction and lag compensation
Implement advanced ballistics with material penetration and damage modeling
Build AI state machines for combat encounters and world simulation
Own inventory replication and agile loot spawn systems
Drive Technical Excellence
Optimize for consistent 60+ FPS in intense multiplayer scenarios
Establish Unreal best practices across the engineering team
Balance competitive feel with network performance
Scale for Success
Implement persistent player progression and reputation systems
Design session management and skill-based matchmaking
Integrate backend services, databases,
and analytics pipelines
Must-Haves 5+ years shipping games with Unreal Engine (UE4/UE5)
Deep C++ expertise in gameplay architecture
Shipped at least 2 commercial games (ideally multiplayer)
Proven experience with weapon systems and combat mechanics
Mastery of multiplayer concepts: replication, RPCs, lag compensation
Backend integration experience
Bonus Points Extraction shooter or Battle Royale development
Anti-cheat and competitive integrity systems
Gameplay Ability System (GAS) expertise
Experience scaling to 1000+ concurrent players
Live-service game operations
Why Ironbelly? Proven Track Record: Our team has contributed to 300+ projects from indie to AAA franchises
Technical Freedom: Senior engineers drive architectural decisions - no micromanagement
Stable & Funded: Fully-funded project with clear roadmap and experienced leadership
Remote-First Culture: Work from anywhere in Canada, USA, or South America. Optional collaboration at our Montreal hub for those who want it.
Real Benefits: Competitive salary, comprehensive health coverage (dental, vision), generous PTO
Location This is a hybrid role based in Montreal, Quebec. We're building a centralized team in one of gaming's most vibrant cities. Local candidates or those willing to relocate will be prioritized but all are welcome!