Mobile Engineer III, iOS

At Expedia Group, we help travelers explore the world, one journey at a time. As a global travel company powered by passionate people, trusted partnerships, and leading technology, we connect travelers, partners, and advertisers through our consumer brands, B2B network, and travel advertising business. Here, you'll do meaningful work that helps millions of people discover, book, and experience travel with more ease, confidence, and joy.

Our five Behaviors-Traveler First, Think Big, Operate with Excellence, Ownership Mindset, and Succeed Together-help foster a supportive environment where people can grow their careers and have the flexibility, benefits, and support to do their best work. Join us and build for travelers everywhere.

Our Technology Team partners with teams across Expedia Group to create innovative products, services, and tools to deliver high‑quality experiences for travelers, partners, and our employees. A singular technology platform powered by data and machine learning provides secure, differentiated, and personalized experiences that drive loyalty and traveler satisfaction.

As a Mobile Engineer III, iOS, working on Expedia's critical production checkout applications, your mission will be to ensure Expedia Checkout is always fast, available, scalable, and engineered to withstand unparalleled demand. You will be in the thick of solving the [often unexpected] problems of systems at scale in a way most engineers never experience. You will have strong analytical and troubleshooting skills, proficiency in coding and systems design, solid interpersonal skills, and a desire to tackle the complex problems of scale.

You are a collaborative and creative individual, and you thrive in a dynamic and agile environment. You adapt to new technologies and enjoy working on complex problems. Every day, we at Expedia get to innovate on web applications that millions of travelers use to plan, book, and experience trips they will remember forever.

• Design, build, and maintain native iOS applications that are secure, performant, and resilient using modern iOS frameworks and best practices
• Translate product and experience requirements into clear technical designs (LLD, API design, data models)
• Collaborate cross‑functionally with backend, product, design, and quality teams to deliver end‑to‑end customer journeys
• Write clean, testable, and observable code; contribute to automated testing, monitoring, and code reviews
• Diagnose and resolve complex production issues, improving application reliability and performance
• Safely integrate and operate AI/ML‑enabled solutions while maintaining privacy and security standards

• Bachelor's degree in Computer Science, Software Engineering, or 5 years of equivalent practical experience
• Professional experience shipping native iOS applications with ownership from design through production
• Strong iOS architecture, low‑level design, API integration, and data modeling experience
• Proficiency with iOS tools, frameworks, testing, observability, and operational best practices
• Experience collaborating in cross‑functional, multi‑domain teams

• Experience designing and scaling complex iOS architectures (modularization, performance, offline support)
• Proven delivery of high‑impact iOS features across multiple domains
• Strong focus on operational excellence (instrumentation, monitoring, alerting, incident resolution)
• Experience integrating AI/ML‑enabled capabilities into mobile apps securely and responsibly
• Familiarity with AI‑driven development tools and applying AI/ML concepts to improve product quality and developer efficiency

The total cash range for this position in…