Principal iOS Engineer - Search and Recommendations Experience

Expedia, Inc.; Greater London; On-site; GBP 80,000 - GBP 110,000; Full time

Job summary

A global travel technology company is seeking a Principal iOS Engineer to lead the design and development of advanced iOS applications. This role focuses on providing technical leadership, architecting scalable systems, and integrating AI capabilities to enhance user experience. Ideal candidates will have over 12 years of experience in iOS development, proficiency in Swift and Objective-C, and a strong understanding of system design principles. The position offers a flexible work environment and competitive benefits.

Benefits

Travel perks

Generous time-off

Parental leave

Flexible work model

Career development resources

Qualifications

• 12+ years of relevant professional experience.
• Experience owning the full lifecycle of iOS services.
• Proficiency in Swift, Objective-C, and iOS frameworks.

Responsibilities

• Lead the design, development, and maintenance of advanced iOS applications.
• Architect and implement robust, scalable system and API designs.
• Drive cross-functional collaboration to define, develop, and ship impactful features.

Skills

Swift

Objective-C

iOS frameworks

AI/ML concepts

Multi-threading

Concurrency

Education

Bachelor’s degree in Computer Science or related field

Job description

Overview

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

The Product Team creates high-quality end-to-end experiences for travelers, partners, and Expedia Group. Our focus on customer-centric innovation enables us to develop products that build loyalty and repeat business. We partner closely with teams across Expedia Group to drive growth and achieve results for our customers and the company.

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.

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.

Accommodation requests

If you need assistance with any part of the application or recruiting process due to a disability, or other physical or mental health conditions, please reach out to our Recruiting Accommodations Team through the Accommodation Request.

We are proud to be named as a Best Place to Work on Glassdoor in 2024 and be recognized for award-winning culture by organizations like Forbes, TIME, Disability:IN, and others.

Expedia Group\'s family of brands includes: Brand Expedia®, Hotels.com®, Expedia® Partner Solutions, Vrbo®, trivago®, Orbitz®, Travelocity®, Hotwire®, Wotif®, ebookers®, CheapTickets®, Expedia Group™ Media Solutions, Expedia Local Expert®, CarRentals.com™, and Expedia Cruises™. All rights reserved. Trademarks and logos are property of their respective owners. CST: 2029030-50

Employment opportunities and job offers at Expedia Group will always come from Expedia Group\’s Talent Acquisition and hiring teams. Never provide sensitive, personal information to someone unless you\’re confident who the recipient is. The official website to find and apply for job openings at Expedia Group is careers.expediagroup.com/jobs.

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.