Airbnb was born in 2007 when two hosts welcomed three guests to their San Francisco home, and has since grown to over 5 million hosts who have welcomed over 2 billion guest arrivals in almost every country across the globe. Every day, hosts offer unique stays and experiences that make it possible for guests to connect with communities in a more authentic way. The Community You Will Join: The Quality Platform team is at the heart of Airbnb’s mission to provide a seamless, high-quality experience for millions of hosts and guests. We don’t just find bugs — we build the infrastructure that prevents them. Our team sits at the intersection of Mobile Infrastructure, Developer Experience, and Applied AI. We empower thousands of engineers across Airbnb to ship with confidence by building high-scale platforms, AI-driven automation, and fault-tolerant systems. You will join a group of high-impact engineers who value craft, operational excellence, and the challenge of navigating one of the world’s most complex mobile codebases. The Difference You Will Make: As a Senior IOS Software Engineer, you will play a key role in evolving our Quality Platform. You will bridge the gap between product engineering and infrastructure, ensuring that our IOS codebase remains highly testable and resilient as it scales. In this role, you will: * Build AI-Native Tooling: Move beyond traditional automation by implementing AI-driven agents that optimize our CI/CD pipelines and provide intelligent feedback to developers. * Enhance Developer Velocity: Identify and resolve systemic bottlenecks in the development lifecycle, allowing teams to move faster without compromising quality. * Advocate for Quality by Design: Work directly with product teams to guide architectural decisions, ensuring that new features are modular and testable from the first line of code. * Ship High-Scale Infrastructure: Own the development and maintenance of frameworks used by hundreds of engineers across Airbnb, ensuring they are performant, reliable, and easy to use. A Typical Day:  * Hands-on Development: Write high-quality, performant Swift code to extend testing frameworks and build AI-powered developer tools, leveraging LLMs to accelerate development workflows * Technical Ownership: Take ownership of key components of our Automated Quality Platform, ensuring operational excellence and high availability (24x7) of our testing infrastructure. * Design & Review: Participate in deep-dive design reviews for new IOS features, providing expert guidance on modularity and testability patterns. * Applied AI: Implement LLM-based solutions for smart test orchestration, test case generation, and autonomous test discovery to reduce CI feedback loops. * Cross-Functional Collaboration: Partner with Product and Mobile Infrastructure teams to align platform capabilities with the needs of the broader engineering org. * Mentorship: Review code and provide technical guidance to peers, fostering a culture of commitment to craft and engineering rigor. Your Expertise: * Experience: 5+ years of professional IOS development experience (or 2+ years with a PhD) in a fast-paced, high-growth tech environment. * Technical Mastery: Strong proficiency in Swift and the IOS SDK. You have a solid understanding of modern IOS architecture and the Xcode build lifecycle. * Infrastructure Experience: Demonstrated expertise in building or maintaining test automation frameworks (e.g., XCUITest) at scale. * CI/CD & Tools: Familiarity with CI/CD orchestration and a passion for building tools that improve the developer experience. * AI Curiosity: A strong interest or hands-on experience in leveraging AI/LLMs to solve engineering productivity or quality challenges. * Problem Solving: Proven ability to navigate complex, ambiguous codebases and implement best-in-class solutions. * Communication: Excellent communication skills with the ability to facilitate technical discussions across cross-functional teams. Our Commitment To Inclusion & Belonging: Airbnb is committed to working with the broadest talent pool possible. We believe diverse ideas foster innovation and engagement, and allow us to attract creatively-led people, and to develop the best products, services and solutions. All qualified individuals are encouraged to apply. We strive to also provide a disability inclusive application and interview process. If you are a candidate with a disability and require reasonable accommodation in order to submit an application, please contact us at: [email protected]. Please include your full name, the role you’re applying for and the accommodation necessary to assist you with the recruiting process.  We ask that you only reach out to us if you are a candidate whose disability prevents you from being able to complete our online application.