Senior Unreal Gameplay Engineer | Multiplayer FPS

About this role

JOIN THE TEAM WHO'S HELPED BUILD 300+ GAMES RANGING FROM CALL 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 dynamic 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!