--- title: 'Lead UI Engineer at 31st Union' canonical: 'https://feeny.ai/job/lead-ui-engineer-31st-union-san-mateo-california-tysjd9e6s3hz' type: 'job' last_seen: '2026-09-11' --- # Lead UI Engineer at 31st Union - **Company:** 31st Union - **Location:** San Mateo California, United States - **Posted:** 2026-03-24 - **Last confirmed live:** 2026-09-11 - **Apply:** https://job-boards.greenhouse.io/31stunion/jobs/7668112003 ## Job description ## WE ARE GAME MAKERS Who We Are: We are a diverse team of developers driven by a passion for our art, united by our core values and inspired by a culture of inclusivity to build amazing games that thrill players everywhere. We pursue growth and innovation in an environment of safety and trust. Our culture is built on the belief that the more varied voices in our collective will strengthen our team and our games.  We are looking for our next teammate who will raise our bar and make us better. What We Need: We're seeking a Lead UI Engineer, to provide tech direction for our AAA multiplayer project and leadership for our team of UI engineers. In this role, you will design and build flexible, scalable, accessible, and high-performance UI systems using modern UE5 frameworks (CommonUI, MVVM, Enhanced Input), while partnering closely with engineers and cross-disciplinary teams. The ideal candidate has deep experience in all aspects of UI development – including hitch-free resource management, integration with latent backend services, support for a wide set of display devices and high frame rates, console-specific requirements, and live configuration. What You’ll Do: - Engage creatively with Design and Production on new features to identify opportunities, challenges and cost. - Direct the technical design and implementation of the game’s UI using highly supported / best-in-class patterns and UE frameworks. - Maintain robust solutions for asynchronous asset management and integration with latent backend services (e.g. inventory, matchmaking, live telemetry) while maintaining a responsive user experience. - Manage UI performance and memory budgets. Leverage GPU where needed to support competitive, high framerate play. - Ensure UI implementations meet first party certification requirements. - Build UI systems designed for global deployment – supporting dynamic text scaling, diverse font sets, complex string tables, and right-to-left languages. - Implement comprehensive accessibility features to support inclusive UX design. - Architect data-driven UI systems that support server-side configuration. This includes dynamic screen layouts, remote control reordering, friction reduction, and real-time promotions without requiring client patches. - Mentor a team of UI engineers, conduct code reviews, and develop workflows to improve the efficiency of the UI/UX design team. What Will Make You A Great Fit: - 7+ years of professional game programming experience, including at least 2 shipped AAA titles in a Senior or Lead UI role. - Deep technical knowledge of Unreal Engine UI systems, specifically CommonUI, UMG, Slate, and MVVM patterns. - Expert C++ programming skills, specifically regarding asynchronous data handling, memory management, and C++/Blueprint interoperability. - Direct experience resolving UI-related console certification issues (TRC/TCR) for PlayStation and/or Xbox platforms. - Practical understanding of the Unreal material pipeline as applied to building performant UI materials and shaders. Beneficial Qualifications: - Live Ops / F2P Experience: Proven experience working on a live-service or Free-to-Play game, with a strong understanding of commerce UI, dynamic content delivery, and player conversion funnels. - Action Game Background: Previous experience working on multiplayer shooters, action RPGs, or competitive games. The pay range for this position in California at the start of employment is expected to be between $133,900 and $198,160 per year. However, base pay offered is based on market location, and may vary further depending on individualized factors for job candidates, such as job-related knowledge, skills, experience, and other objective business considerations. Subject to those same considerations, the total compensation package for this position may also include other elements, including a bonus and/or equity awards and eligibility to participate in our 401(K) plan and Employee Stock Purchase Program. Regular, full-time employees are also eligible for a range of benefi ts at the Company, including: 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 benefi ts; and reimbursements for fi tness-related expenses. Ontario only: The use of Artifi cial Intelligence is not being used to screen candidates. The position is for an existing vacancy. #LI-Onsite #LI-Hybrid #LI-Remote ## About 31st Union ## Company Overview - **One-liner**: 31st Union is a video game development studio creating highly engaging multiplayer entertainment as a wholly owned studio of 2K, a publishing label of Take-Two Interactive. - **Entity Type**: Private (wholly owned subsidiary of Take-Two Interactive Software, Inc., NASDAQ: TTWO) - **Headquarters**: San Mateo, California, United States - **Founded**: 2019 - **Founders**: Not publicly disclosed (studio formed by 2K/Take-Two Interactive) ## Core Business - **Primary industry/industries**: Video Game Development (AAA console/PC gaming) - **Target customers**: B2C (consumers/players), specifically fans of online multiplayer gaming experiences - **Mission or purpose statement**: "Crafting highly engaging entertainment and a commitment to putting players first" — the studio's rallying cry is "Bring fun, inspiration and awe to our lives and to our community." ## Products & Services - **Unannounced Title (in development)**: A highly engaging online multiplayer game. The studio is actively hiring across engineering, UI, UX, animation, and design disciplines to build this "inspired new game experience." The specific title or franchise has not been publicly revealed. ## Market Standing - **Valuation/Market Cap**: Not publicly available (subsidiary of Take-Two Interactive, which has a market cap of roughly $30B+ as of mid-2026) - **Key Metric**: Studio size of approximately 146 employees (per Built In), with active hiring across both San Mateo and Valencia, Spain locations - **Notable Investors/Partners**: Parent company is Take-Two Interactive Software, Inc. (NASDAQ: TTWO), operating under the 2K publishing label. This provides the studio with "the collaborative support and incredible perks of one of the world’s leading interactive entertainment companies." - **Growth Signals**: The studio is actively expanding its team, with open roles in engineering, animation, and UI/UX design. The studio operates as "one empowered global team across North America and Spain," indicating a growing international footprint. ## Competitive Advantages - **AAA Backing with Studio Autonomy**: 31st Union "cherishes studio independence and autonomy" while benefiting from the financial stability, resources, and perks of Take-Two Interactive, a top global publisher. - **Multi-Location Talent Pool**: Dual studios in San Francisco Bay Area and Valencia, Spain allow access to diverse global talent across all disciplines. - **Player-First Culture**: The studio is built on values of trust, inclusivity, and psychological safety, which they believe enables the best creative work. ## Strategic Focus - **Building a New IP**: The studio is focused on developing a new, original online multiplayer game from the ground up, investing heavily in UI systems, animation, and technical design. - **Global Team Empowerment**: They are building a "one team" culture where all disciplines are represented in both North America and Spain, with shared ownership of the game's success. - **Innovation in Gameplay**: Driven by the motto "Chase the Horizon," the team is focused on pushing creative boundaries to deliver a "brilliant" experience that "raises the bar." ## Why Work Here - **Culture**: Emphasizes a "psychologically safe space," inclusivity, trust, and a commitment to personal growth ("Live Your Dreams"). The studio values diverse perspectives and operates with a "player-first" mindset. - **Work Policy**: Roles listed are "In-Office" at the San Mateo, CA headquarters. The studio has a physical office with bike stations, EV charging, and well-stocked kitchens. - **Notable Perks & Benefits**: - Private healthcare (medical, dental, vision) for employees & dependents - Generous PTO & sick time off - Employee Stock Purchase Program (ESPP) - Fitness reimbursement program - Life & disability insurance - Parental leave & compassionate leave - Retirement savings plans with company contributions - Learning & development tools - Employee referral bonuses - Charitable giving, corporate match & volunteer program - Mental health & wellbeing offerings - Company social events & gatherings - Commuter & meal perks ## Sources 1. [thirtyfirstunion.com](https://thirtyfirstunion.com/) 2. [thirtyfirstunion.com/careers](https://thirtyfirstunion.com/careers/) 3. [thirtyfirstunion.com/studio](https://thirtyfirstunion.com/studio/) 4. [job-boards.greenhouse.io/31stunion](http://job-boards.greenhouse.io/31stunion) 5. [builtin.com/company/31st-union](https://builtin.com/company/31st-union) ## Other roles at 31st Union - [Lead Producer](https://feeny.ai/job/lead-producer-31st-union-san-mateo-california-f8rbwdkh8c08) — San Mateo California, United States - [Producer](https://feeny.ai/job/producer-31st-union-san-mateo-california-29kbkg1ec67d) — San Mateo California, United States - [Lead Designer](https://feeny.ai/job/lead-designer-31st-union-san-mateo-california-rmkdjkgpak35) — San Mateo California, United States - [Shader Technical Artist](https://feeny.ai/job/shader-technical-artist-31st-union-san-mateo-california-hh7zdr81j2xd) — San Mateo California, United States - [Senior Director, Online Services](https://feeny.ai/job/senior-director-online-services-31st-union-san-mateo-california-5827shd0j69y) — San Mateo California, United States - [Lead UI Engineer](https://feeny.ai/job/lead-ui-engineer-epic-games-cary-bf4egzp1wgmd) — Cary, NC - [Lead UI Engineer](https://feeny.ai/job/lead-ui-engineer-2k-san-mateo-california-hk67401wgad5) — San Mateo California, United States