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Expedia Group

Principal iOS Engineer - Search and Recommendations Experience

London
Posted about 1 month ago
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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.

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.

This Principal iOS Engineer sits within the Search and Recommendations Experience team which owns the end-to-end search and recommendations experience, including search entry, results, maps, filters, and recommendations across multiple lines of business such as lodging, cars, activities, flights and packages. In this role, you will provide technical leadership for native search and discovery experiences, setting architectural direction, influencing engineering standards, and shaping the evolution of AI-enabled capabilities across the mobile platform.

In This Role, You Will

  • Lead the design, development, and maintenance of advanced iOS applications, ensuring high performance, quality, and responsiveness across Expedia Group’s product suite.
  • Architect and implement robust, scalable system and API designs, including effective data modeling to support complex business requirements.
  • Drive cross-functional collaboration to define, develop, and ship impactful features, ensuring alignment with organizational goals and technical strategy.
  • Champion best practices in software engineering, testability, and maintainability through code reviews and mentoring.
  • Safely integrate and operate AI/ML-enabled solutions to enhance user experience and improve operational outcomes.
  • Troubleshoot, optimize, and resolve complex technical issues, contributing to the continuous improvement of services and domain capabilities.

Reasons to use Rodeo

I’m in my final year doing Economics and I don’t know whether to apply for grad schemes now or do a masters first. What do you think?

Honest answer — it depends on where you want to end up. A lot of top grad schemes (Big 4, civil service, banking) don’t need a masters. Let’s look at the ones you’d be competitive for now, and we can decide if a masters actually adds anything.

Also worth knowing: most autumn 2026 applications are open now. Timing matters more than you think.

Start with a chat, not a search bar

Grad scheme, placement, apprenticeship? Not sure what you want yet — that's fine. Your agent talks it through with you and turns "I have no idea" into a shortlist.

P

Graduate Consultant — 2026 Scheme

PwC·London, UK
£35,000/yr

Why you're a good match

Strong

Your economics background and your summer at a regional bank line up with what PwC looks for on the consulting scheme. Applications close in four weeks.

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It searches the market for you

Every day your agent scans the market matching roles against what actually matters to you, not just keywords on a CV.

Why you're a good match

You’ve got the grades and the economics background, and your bank internship is exactly the experience this scheme looks for. Apply soon — deadlines close within the month.

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Strong

Experience fit

Your summer at the bank plus your econometrics coursework map directly to the day-one responsibilities on this scheme — client modelling, market briefings, and deal support.

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Strong

Only hits

No noise. No "maybe this fits." Just roles with a clear explanation of why they're right — and where to focus when applying.

Minimum Qualifications

  • Bachelor’s degree in Computer Science or a related technical field; or equivalent related professional experience.
  • 12+ years of relevant professional experience.
  • Demonstrated experience owning the full lifecycle of iOS services or features within a multi-service or domain environment.
  • Proficiency in Swift, Objective-C, and iOS frameworks, with a strong understanding of system and API design principles.
  • Familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real-world products.

Preferred Qualifications

  • Experience architecting scalable, complex, modular, and maintainable iOS mobile architectures, leveraging common design patterns such as MVVM or VIPER.
  • Advanced proficiency in SwiftUI - Skilled in multi-threading, concurrency, and performance optimization.
  • Prior experience in the search domain or travel industry, such as building or scaling search, discovery in consumer mobile apps.
  • Experience establishing technical strategy, best practices, and operational excellence for organizational mobile platforms.
  • Advanced knowledge of integrating AI/ML capabilities into mobile products to enhance functionality and user engagement.
  • Demonstrated experience collaborating within large, globally dispersed development teams.
  • Expertise in cross-platform or multi-domain engineering, contributing to broad technical initiatives.

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Accommodation requests

Expedia Group is committed to providing an inclusive and accessible recruiting experience. If you need an accommodation or adjustment due to a disability during the application or recruiting process, please submit a request at https://expedia.service-now.com/askeg?id=job_accommodation.

About Expedia Group

Expedia Group includes three flagship consumer brands - Expedia, Hotels.com, and Vrbo - along with a leading B2B travel business and travel advertising offerings. Across our brands and business, we help travelers explore the world with confidence and ease.

Important notice

Employment opportunities and job offers at Expedia Group will always come from Expedia Group's Talent Acquisition and hiring teams. Never share sensitive personal information unless you are confident of the recipient. Expedia Group does not extend job offers via email or messaging tools to individuals with whom we have not made prior contact. Our email domain is @expediagroup.com. The official place to find and apply for roles is https://careers.expediagroup.com/jobs/.

Equal Opportunity

Expedia is committed to creating an inclusive work environment with a diverse workforce. All qualified applicants will receive consideration for employment without regard to race, religion, gender, sexual orientation, national origin, disability or age.

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Skills

iOS Development
Swift
Objective-C
API Design
Data Modeling
AI
Machine Learning
Software Engineering
Code Reviews
Mentoring
Cross-Functional Collaboration
Performance Optimization
Concurrency
Scalability
Modular Architecture
Search Domain

Location

London, England, United Kingdom

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