Staff Software Engineer, Core Engine

The opportunity
Were looking for a Staff Engineer to join the Runtime team within the Core Engine group here at Unity. Youll be responsible for designing implementing and maintaining the low-level systems that form the backbone of the Unity runtime. Youll work across subsystems including transforms the player loop the job system serialization and support higher level features like physics and netcode. Your work will directly impact the performance stability and capabilities available to millions of developers worldwide.

This is a highly technical individual contributor role with significant influence over architectural decisions and engineering practices. Youll collaborate closely with teams across rendering physics animation scripting and platform engineering to ensure the core engine meets the evolving needs of real-time 3D content creation.

This role requires deep expertise in C and systems programming a track record of technical leadership and the ability to mentor engineers while driving critical initiatives that shape how creators build with Unity.

What youll be doing

• Design and implement core runtime systems with a focus on performance memory efficiency and cross-platform compatibility
• Lead technical initiatives spanning multiple teams driving alignment on architecture and implementation approaches
• Profile analyze and optimize engine performance across diverse hardware targets including consoles mobile devices desktop and emerging platforms
• Mentor and support engineers across the organization raising the bar for code quality and engineering rigor
• Contribute to technical strategy and roadmap planning for the core engine
• Write clear technical documentation and participate in design reviews
• Debug complex system-level issues that span multiple subsystems
• Evaluate and integrate new platform capabilities and hardware features

What were looking for

• Extensive experience in systems programming with deep expertise in C
• Proven experience building and shipping low-level engine or runtime systems at scale
• Strong understanding of computer architecture memory hierarchies cache behavior and CPU/GPU interaction
• Experience with multithreaded programming
• Familiarity with multiple platforms (Windows macOS Linux consoles mobile) and their toolchains
• Track record of leading cross-team technical initiatives and influencing engineering direction
• Excellent debugging and profiling skills
• Strong written and verbal communication skills

You might also have

• Experience with game engine development (Unity Unreal proprietary engines)
• Experience with C# and the managed runtime
• Familiarity with SIMD programming
• Experience with Burst LLVM or other compiler technologies
• Contributions to open-source projects or published technical writing

Additional information

• Relocation support is not available for this position

Benefits
At Unity we want our team members to thrive. We offer a wide range of benefits designed to support well-being and work-life balance.

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 leading platform to create and grow games and interactive experiences. Creators ranging from game developers to artists architects automotive designers infrastructure experts filmmakers and more use Unity to bring their imaginations to life across multiple platforms from mobile PC and console to spatial computing.

As of the third quarter of 2024 more than 70% of the top 1000 mobile games were made with Unity and in 2024 Made with Unity applications had an average of 3.7 billion downloads per month. For more information please visit Unity.

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.

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.

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Required Experience:

Staff IC