Mobile Engineer III - iOS

Expedia Group•Seattle, WA

20h•Hybrid

About The Position

Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. The Air Flexibility & Air Filters team focuses on transforming how travelers search for flights when plans are still forming. We build mobile experiences that help travelers explore flexible dates, alternate airports, and dynamic filters, making flight discovery clearer, faster, and more trustworthy. As a Mobile Engineer III – iOS, you will build and own customer-facing iOS features that sit directly on the critical path of discovery, experimentation, and conversion. You’ll work closely with Android, web, backend, product, and design partners to deliver high-quality mobile experiences at scale.

Requirements

Bachelor’s degree in Computer Science, Engineering, or a related technical field, or equivalent professional experience
5+ years of professional iOS software development experience with a Bachelor’s degree, or 3+ years with a Master’s degree
Strong proficiency in Swift and modern iOS frameworks such as SwiftUI (UIKit experience is a plus)
Experience architecting scalable, modular, and maintainable iOS applications, using common patterns such as MVVM
Strong understanding of performance optimization, memory management, and concurrency on iOS
Experience integrating iOS applications with backend services and APIs
Experience supporting production applications, including debugging, monitoring, and incident response
Solid understanding of software design principles, algorithms, and data structures

Nice To Haves

Experience integrating iOS applications with GraphQL APIs, including optimizing data usage and network performance
Experience collaborating closely with backend teams and contributing to end-to-end mobile features
Experience integrating third-party SDKs and APIs in production iOS applications
Experience applying AI tools for tasks such as code generation, refactoring, testing, debugging, or documentation
Exposure to experimentation frameworks, feature flags, or data-driven product development
Familiarity with accessibility best practices and building inclusive mobile experiences

Responsibilities

Design and develop high-quality iOS features using modern engineering practices, clean code principles, and thoughtful architecture
Build and evolve SwiftUI-based experiences, ensuring performance, reliability, accessibility, and maintainability
Collaborate cross-functionally with product managers, designers, backend engineers, and mobile peers to deliver end-to-end mobile features
Integrate iOS applications with backend services and GraphQL APIs, handling networking, state, and data efficiently
Apply strong software design principles, algorithms, and data structures to solve complex product and technical problems
Lead and participate in code reviews, helping guide code quality and architectural consistency across the iOS codebase
Debug and resolve complex issues related to performance, memory usage, concurrency, and networking
Contribute to production reliability through on-call rotations, incident response, and root-cause analysis
Leverage AI-powered development tools to improve productivity, code quality, debugging, and learning
Explore and apply emerging technologies when they provide clear product or developer-experience value
Mentor junior engineers through pairing, reviews, and technical guidance