Software Development Engineer III

Expedia Group; Greater London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Expedia Group in London is seeking a Software Development Engineer III within B2B to build scalable, high‑quality software that powers our global partner ecosystem. You will be a key technical contributor, mentor junior engineers, and lead complex engineering initiatives.

You will collaborate across teams to design robust APIs, apply software design principles, test and debug production systems, and contribute to the technical direction of our products.

Qualifications

• Bachelor's degree in CS, Engineering, or related field; or equivalent experience with 5+ years of software development
• Master's degree with 3+ years of software development
• Experience developing software in at least 3 languages
• Experience designing and building APIs for consumption across a business unit

Responsibilities

• Lead design, development, and delivery of complex systems and APIs across the unit
• Mentor junior engineers and lead code reviews
• Collaborate across the organization to coordinate cross-dependencies
• Design clean, modular, and well-tested software
• Test, debug, and resolve production issues within SLAs
• Identify inefficiencies in code or systems and propose improvements
• Contribute to a community of practice and share knowledge
• Present findings on major initiatives to stakeholders

Skills

Software development

API design

Programming languages

Team collaboration

Testing and monitoring

Education

Bachelor's degree in CS/Engineering

Master's degree in CS/Engineering

Tools

Testing tools

Monitoring tools

Job description

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.

Job Description

Introduction to the Team

In the B2B division, we bring Expedia Group's innovative technology and distribution solutions to partners across the world. These businesses include global financial institutions, corporate managed travel, offline travel agents, global travel suppliers (like major airlines) and many more.

As a Software Development Engineer III within B2B, you will be a key technical contributor building scalable, high-quality software solutions that power our global partner ecosystem.

You will mentor junior engineers, lead complex engineering initiatives, and help shape the technical direction of our products and systems.

In This Role, You Will

• Lead the design, development, and delivery of complex systems and APIs consumed across the business unit
• Mentor junior engineers, providing technical guidance and leading code evolution through structured code reviews
• Proactively collaborate with peers across the organization to identify cross-dependencies and engage in shared problem-solving
• Design software that is clean, maintainable, modular, and optimized, applying software design principles, data structures, and design patterns
• Test, debug, and resolve production issues within established SLAs, ensuring software consistently meets design requirements
• Identify areas of inefficiency in code or system operations and propose actionable improvements
• Contribute to a community of practice, sharing new skills and technical knowledge to increase overall team effectiveness
• Present findings on major operational or technical initiatives (e.g., Root Cause Analyses) to broader stakeholder groups, both in written and verbal formats
• Apply knowledge of software frameworks, databases, and database design principles to develop robust, effective data solutions
• Bring together stakeholders with varied perspectives to develop solutions and contribute actionable recommendations

Experience And Qualifications

• Bachelor's degree in Computer Science, Engineering, or related technical field; or equivalent related professional experience — with 5+ years of software development experience; OR Master's degree in Computer Science, Engineering, or related technical field; or equivalent related professional experience — with 3+ years of software development experience
• Experience developing software in at least 3 different programming languages
• Experience maintaining and operating at least 4 software projects or products in production environments (e.g., bug fixing, troubleshooting, monitoring)
• Experience designing and building APIs for consumption across a business unit
• Knowledge of software design principles, data structures, design patterns, and computer science fundamentals
• Familiarity with testing and monitoring tools, with the ability to design easily testable and observable software
• Ability to work both collaboratively and autonomously across cross-functional teams

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.

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.