Senior SDK Engineer, Unity Ads (Full-Stack)

The opportunity

We are hiring a Senior SDK Engineer to join as a senior individual contributor on the Ad Unit team. You will own end-to-end ad features that span ad unit logic, mobile SDK integration, and event gateway services.

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 end-to-end ad features that span ad unit logic, mobile SDK integration, and event gateway services.


• Work closely with the SDK team to ensure reliable, performant event generation and delivery from client-side SDKs to backend systems.


• Design and implement end-to-end ad features, coordinating changes across ad unit rendering, native SDKs, and backend APIs.


• Partner with backend teams to design and evolve gateway APIs.


• Ensure features are implemented with strong attention to latency, error handling, and reliability, especially for client-facing flows.


• Proactively improve existing systems, abstractions, and development practices to reduce complexity and enable faster iteration.


• Exercise sound technical judgment when balancing UX requirements, backend complexity, performance, and delivery timelines.


• Collaborate closely with product managers, frontend engineers, SDK engineers, backend teams, and QA to drive features from concept through release.


• Participate actively in design and code reviews, contributing to overall engineering quality and cross-team alignment.

What we're looking for

• Experience working on Ads platforms, monetization systems, or real-time client-facing services.


• Strong proficiency in Go


• Familiarity with high-throughput event ingestion services, queues, or streaming systems.


• Prior experience integrating mobile SDKs with backend services, especially in performance-sensitive environments.


• Familiarity with gateway or API-layer services that serve multiple client types.


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

Additional information

• Relocation support is not available for this position


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

Life at UnityWe offer a wide range of benefits designed to support employees' well-being and work-life balance. You can read more about them on our career page.

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 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.

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