• Develop client-facing features • Work on core gameplay improvements • Develop new meta features • Enhance and refine existing systems

• Design, implement, and refine responsive, engaging gameplay systems and mechanics. • Develop player controls, character behaviors, game modes, progression systems, AI, physics interactions, animation systems, and other core gameplay features. • Work closely with game designers to translate concepts and prototypes into polished, scalable gameplay experiences. • Rapidly prototype new mechanics and iterate based on playtesting, player feedback, analytics, and creative direction. • Improve moment-to-moment game feel through responsive controls, clear feedback, satisfying interactions, and thoughtful pacing. • Write clear, maintainable, and performant code for cross-platform mobile games. • Collaborate with producers, designers, artists, animators, QA, and other developers to ensure games are fun, responsive, stable, and engaging. • Partner with game directors and producers to estimate work, evaluate technical approaches, improve development processes, and identify and mitigate project risks. • Build flexible tools and systems that allow designers and artists to efficiently create, tune, and iterate on gameplay content. • Optimize gameplay systems for performance across a wide range of iOS and Android devices. • Improve content, development, and build pipelines throughout production. • Contribute to a culture of ownership and continual improvement through knowledge sharing, constructive feedback, and participation in agile development. • Mentor junior and intermediate developers, helping them strengthen their technical skills and improve the quality of their work.

• Work in Unreal Engine, using Blueprints and other tools to design, prototype, and iterate on player abilities. • Implement and maintain gameplay features from early concept through polish in close collaboration with engineering and other technical design partners. • Playtest, tune, and refine abilities that influence combat, traversal, exploration, social interactions, and player expression to support engaging and readable multiplayer experiences. • Align with leadership and management on creative goals and desired outcomes. • Own the design and iteration of player-facing abilities and modifiers tied to weapons, tools, items, armors, and related systems. • Collaborate with cross-disciplinary partners such as engineering, animation, audio, art, and VFX to align abilities with combat, traversal, progression, social goals, and technical constraints. • Balance and tune gameplay features with an understanding of multiplayer dynamics and emergent player and multiplayer behavior. • Advocate for the player experience, ensuring abilities feel intuitive, expressive, and fun over time.

Role Description 31st Union is looking for a Senior Gameplay Engineer to develop our Player Bots — AI agents that stand in for human players in our AAA free-to-play, cross-platform action game. Using C++, Unreal Engine 5, and our in-house utility AI framework, you will make bots that fight, traverse, loot, and team up convincingly enough that players second-guess whether they’re facing a human. The same bots power mode backfill and automated testing at scale. Responsibilities: - Develop combat behavior: target prioritization, hero-appropriate weapon and ability use, movement, and disengagement - Develop humanization: tunable aim, reaction time, and error models across difficulty levels - Develop macro behavior: team cohesion, traversal, pacing, events, looting, and progression - Extend our utility AI framework: new behaviors, scoring, and tuning - Keep bot populations performant: throttling, suspension, and LOD - Extend bots as automated test clients, from feature tests to match-scale load tests - Build bot evaluation tooling: debug visualization and playtest metrics - Partner with design to tune behavior through playtests Qualifications - 5+ years of gameplay or game AI engineering on shipped action games - Strong C++ and Unreal Engine fluency, including AI controllers, navigation, and EQS - Utility AI or comparable decision-making architectures - AI in networked multiplayer: client/server authority, prediction, dedicated servers - Humanlike combat AI: aim and error models, reaction time, believable movement - Optimizing many concurrent agents: LOD and tick throttling Requirements - Player bots in a competitive shooter - Unreal Engine 5, StateTree, and the Gameplay Ability System - Control systems (e.g., PID controllers) and input simulation - Automated test clients and load testing Benefits - Medical, dental, vision, and basic life insurance coverage - 14 paid holidays per calendar year - Paid vacation time per calendar year (ranging from 15 to 25 days) or eligibility to participate in the Company’s discretionary time off program - Up to 10 paid sick days per calendar year - Paid parental and compassionate leave - Wellbeing programs for mental health and other wellness support - Family planning support through Maven - Commuter benefits - Reimbursements for fitness-related expenses