Senior SDK Engineer, Unity Ads (iOS)

We are hiring a Senior SDK Engineer to act as a senior individual contributor on the iOS SDK, owning features or subsystems end-to-end from design through implementation and maintenance. 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 youll be doing • Act as a senior individual contributor on the iOS SDK, owning features or subsystems end-to-end from design through implementation and maintenance. • Contribute to the development and evolution of the iOS SDK architecture within established platform direction and guardrails. • Implement reliable, performant iOS SDK components with strong attention to threading, lifecycle, and main-thread safety. • Identify and fix production crashes, performance issues, and regressions, and contribute to improving overall SDK stability. • Proactively improve existing code, abstractions, and development practices to enhance maintainability and reliability. • Exercise sound technical judgment in balancing correctness, performance, and delivery timelines. • Collaborate closely with Android engineers, backend teams, product managers, and QA to ensure consistent SDK behavior and safe integrations. • Participate in design and code reviews, providing thoughtful feedback and raising engineering quality across the team. What were looking for • 6 years of professional iOS development experience. • Strong proficiency in Swift • Experience developing iOS SDKs. • Familiarity with Ads SDKs, monetization platforms, or other performance-sensitive mobile systems. • Familiarity with cross-platform SDK alignment and shared contracts between iOS and Android. • Experience with SDK observability, diagnostics, and release processes. • Knowledge of mobile security and privacy best practices. • Experience operating in large, mature codebases with a focus on stability and backwards compatibility. Additional information • Relocation support is not available for this position • Work visa/immigration sponsorship is not available for this position