Senior Engine Integration Engineer

The opportunity

We're looking for engineers eager to help us invent how different real-time 3D runtimes communicate and render under real-world constraints. You’ll work at the intersection of core engine tech, high-performance networking, distributed systems, and graphics. This is your opportunity to build the fundamental infrastructure for the next generation of interconnected game and 3D ecosystems.

You're our in-house expert for the "other side". We're not porting a game—we're integrating engines themselves. Your deep expertise in another AAA engine will help us reconcile diverging lifecycles, serialization models, networking metaphors, and resource management so both can stay in sync. This role blends hands-on engine coding, plugin/middleware development, and cross-company collaboration. If wiring two full game engines into one coherent system sounds compelling, this is your chance.

What you'll be doing

• Serve as subject matter expert on Unreal architecture and best practices, especially networking, serialization, resource management, and lifecycles.
• Act as liaison between Unity and game engine partners, bridging technical concepts and architectural philosophies.
• Design subsystems that map Unity features to Unreal equivalents (and vice versa) to synchronize content at scale.
• Debug complex cross-engine interactions: crashes, race conditions, resource contention, and feature "impedance mismatches".

What we're looking for

• Unreal Mastery: Extensive knowledge of Unreal source code, resource management, UObject lifecycle, and Slate UI
• Integration Experience: You've written plugins or middleware that deeply modify or extend Unreal's core functionality
• Networking Knowledge: Strong understanding of Unreal's replication model, authority handling, and synchronization toolbox
• Unity Familiarity: Sufficient Unity experience to map concepts between engines, especially where abstractions clash.

You might also have

• Background shipping games or middleware across multiple engines
• Experience porting games between engines, including the asset conversions and build pipeline work.
• Knowledge of FBX, USD, glTF, or similar interchange formats
• Experience modifying game engine source code for custom builds or specialized features.

Additional information

• Relocation support is not available for this position
• Work visa/immigration sponsorship is not available for this position

Benefits

Please note: Benefits eligibility, specific offerings, and coverage vary based on the country and employment status.

While specific benefits vary, here are some of the ways we strive to take care of our eligible team members globally: Comprehensive health, life, and disability insurance | Commute subsidy | Employee stock ownership | Competitive retirement/pension plans | Generous vacation and personal days | Support for new parents through leave and family-care programs | Office food snacks | Mental Health and Wellbeing programs and support | Employee Resource Groups | Global Employee Assistance Program | Training and development programs | Volunteering and donation matching program

Life at Unity

Unity [NYSE: U] is the world’s leading game engine, powering play for more than 3 billion consumers each month. The top mobile games in the world, the most played PC indie titles, the most innovative console games, and virtually all of the top XR and Web Games are developed, deployed, and grown in Unity. Unity also enables teams across industries like automotive, manufacturing, and healthcare to design, simulate, and collaborate in 3D — closing the gap between ideas and reality. For more information, please visit www.unity.com.

Unity is a proud equal opportunity employer. We are committed to fostering an inclusive, innovative environment and celebrate our employees across age, race, color, ancestry, national origin, religion, disability, sex, gender identity or expression, sexual orientation, or any other protected status in accordance with applicable law. Our differences are strengths that enable us to support the growing and evolving needs of our customers, partners, and collaborators. If you have a disability that means there are preparations or accommodations we can make to help ensure you have a comfortable and positive interview experience, please fill out this form to let us know.

Pursuant to the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.

This position requires the incumbent to have a sufficient knowledge of English to have professional verbal and written exchanges in this language since the performance of the duties related to this position requires frequent and regular communication with colleagues and partners located worldwide and whose common language is English.

Headhunters and recruitment agencies may not submit resumes/CVs through this Web site or directly to managers. Unity does not accept unsolicited headhunter and agency resumes. Unity will not pay fees to any third-party agency or company that does not have a signed agreement with Unity.

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*Note: Certain locations require a good faith disclosure of the base salary range for the role. The actual salary for the successful candidate may differ based on location, experience, and other job-related factors.