The opportunity

We are hiring a Senior SDK Engineer to join as a senior individual contributor on the Ad Unit team. You will own the frontend implementation of ad units and formats, delivering polished, interactive UI/UX experiences from design through production.

This is a chance to work at the exciting intersection of SDK development, machine learning, and data infrastructure. Join us to create innovative solutions that propel advertising technology forward, impacting billions of global ad experiences while ensuring privacy and compliance.

What you'll be doing

Act as a senior individual contributor on the Ad Unit team, owning the frontend implementation of ad units and formats, delivering polished, interactive UI/UX experiences from design through production.

Design, implement, and iterate on interactive ad experiences, including UI, layout, animation, and user interaction flows.

Translate product and design concepts into high-quality, performant frontend implementations.

Own and drive improvements in the rendering and presentation layer of ad units, ensuring correctness, visual polish, and consistent behavior across devices.

Optimize frontend performance to ensure smooth animations, responsive interactions, and minimal rendering overhead.

Identify and resolve frontend bugs, rendering issues, and UX regressions in production.

Proactively improve frontend architecture, component reuse, and development practices to support rapid iteration and maintainability.

Exercise sound technical judgment when balancing UI/UX quality, performance, complexity, and delivery timelines.

Collaborate closely with product managers, designers, backend engineers, and mobile SDK teams to ensure ad formats are technically feasible and well-integrated.

Participate actively in design and code reviews, raising the bar for frontend engineering quality across the team.

What we're looking for

Experience working on Ads platforms, ad rendering systems, or monetization-related products.

Familiarity with animation frameworks (e.g., CSS animations, Web Animations API, canvas, or WebGL).

Experience building highly dynamic or data-driven UI flows, including experimentation or feature-gated behavior.

Knowledge of frontend performance tooling and debugging (e.g., browser dev tools, profiling, performance timelines).

Experience collaborating closely with designers on interaction design, motion, and visual polish.

Familiarity with A/B testing or experimentation frameworks and iterating on UI based on metrics.

Experience working with mobile webviews or embedded rendering environments.

Understanding of accessibility best practices and inclusive UI design.

Experience operating in large, mature codebases with a focus on maintainability and stability.

Additional information

Relocation support is not available for this position.

Life at UnityUnity [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 1,000 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.

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.

Gross pay salary$153,400—$230,200 USD