Mobile Engineer III, iOS

Expedia Group•Seattle, WA

5d•$146,000 - $204,500

About The Position

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.

Requirements

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

Nice To Haves

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

Responsibilities

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