Senior Mobile Engineer-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. Why Join Us? To shape the future of travel, people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs, differences are celebrated and know that when one of us wins, we all win. We provide a full benefits package, including exciting travel perks, generous time-off, parental leave, a flexible work model (with some pretty cool offices), and career development resources, all to fuel our employees' passion for travel and ensure a rewarding career journey. We’re building a more open world. Join us. Introduction to team: 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. The Packages Shopping Tech team which sits within our Technology division and focuses on building and optimizing the end-to-end shopping experience for travelers who are searching for and booking multi-item trips, with a particular emphasis on dynamic and pre-bundled packages across flights, lodging, and other trip components. In this role, you will elevate our native app experience for package shoppers by designing and delivering high-performing, user-centric mobile features that make it simpler and faster for travelers to discover, compare, and book the right package for their trip.

Requirements

Proven professional experience as a mobile engineer building and shipping production iOS or Android applications at scale.
Demonstrated ownership of mobile features or services from design through implementation, testing, deployment, and ongoing support.
Strong proficiency in at least one native mobile technology stack (such as Swift/Objective‑C for iOS or Kotlin/Java for Android), including API consumption, offline handling, and robust error management.
Practical experience with mobile application architecture, low-level design, API design, and data modeling, as well as unit, integration, and UI testing practices.
Familiarity with AI-driven systems, tools, or workflows and the ability to safely integrate AI/ML‑enabled capabilities into mobile experiences under guidance and established patterns.

Nice To Haves

Deep expertise in architecting modular, scalable mobile applications, including designing reusable components, maintaining shared libraries, and evolving app architecture over time.
Experience optimizing mobile apps for performance, startup time, memory usage, and battery consumption using profiling, analytics, and observability tools in production environments.
Track record of driving technical initiatives for mobile platforms, such as platform migrations, framework upgrades, or adoption of new patterns that improve developer productivity and app quality.
Experience designing and integrating sophisticated APIs and data models between mobile clients and backend services, including collaboration on contracts, versioning strategies, and resilience patterns.
Experience experimenting with and safely operating AI/ML‑enabled mobile features (for example, personalized content, recommendations, or intelligent assistance), including familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products.

Responsibilities

Design, build, and maintain high-quality mobile applications, ensuring robust system design, API integration, and data modeling that deliver reliable customer experiences across platforms.
Lead implementation of complex mobile features from technical design through deployment, applying strong knowledge of mobile architectures, patterns, and performance optimization.
Collaborate with cross-functional teams to translate product requirements into scalable technical solutions, driving clarity in low-level design, API contracts, and data flows.
Ensure mobile applications meet security, reliability, and operational standards, including monitoring, alerting, and incident resolution for owned services and components.
Safely integrate and operate AI/ML‑enabled solutions that improve outcomes, including familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products in mobile contexts.
Provide technical mentorship within the team, promoting engineering best practices in code quality, testing, CI/CD, and mobile-specific performance and reliability.