Software Development Engineer III

Expedia; Greater London; On-site; GBP 90,000 - 130,000; Full time

Job summary

Expedia Group is seeking a Software Development Engineer III within the B2B division to design, develop, and deliver scalable software and APIs powering our partner ecosystem. You will mentor junior engineers, lead complex engineering initiatives, and influence the technical direction of our products and systems.

You will work across teams to ensure robust, observable software, applying design principles and patterns, and contributing to production readiness through testing and monitoring.

Qualifications

• Bachelor's degree (or Master's) in a technical field with 3+ years (or 5+ years) of software development experience.
• Experience developing software in multiple programming languages.
• Experience designing and building APIs for consumption across a business unit.
• Familiarity with testing and monitoring tools for observable software.
• Ability to mentor engineers and lead code reviews.

Responsibilities

• Lead the design, development, and delivery of complex systems and APIs used across the business unit.
• Mentor junior engineers and lead code evolution through structured reviews.
• Collaborate with peers to identify cross-dependencies and solve problems.
• Design clean, maintainable software using solid design principles and patterns.
• Test, debug, and resolve production issues within SLAs.

Skills

Mentor junior engineers

Code reviews

APIs design

Cross-functional collaboration

Software design principles

Testing and monitoring

Education

Bachelor's degree in Computer Science or related field

Master's degree in Computer Science or related field

Tools

SQL databases

Testing tools

Monitoring tools

CI/CD pipelines

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.

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.

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.