Senior Software Development Engineer, AdTech

11310 Expedia.com Ltd.; Greater London; On-site; GBP 90,000 - 125,000; Full time

Job summary

Expedia Group Advertising is seeking a seasoned software engineer to design, implement, and evolve backend services and APIs for scalable ad tech products. The role emphasizes end-to-end delivery across services, collaboration with cross-functional teams, and a focus on reliability, security, and observability.

You will mentor engineers, lead architectural direction, and safely integrate AI/ML-enabled solutions in alignment with Expedia Group standards.

Qualifications

• Bachelor’s degree or equivalent practical experience in a technical field.
• Experience owning significant services or components in a multi-service environment.
• Proven ability to design and build backend or full-stack systems with APIs and data models.
• Experience with automated testing, code reviews, and CI/CD for production systems.
• Hands-on experience supporting services in production and AI-driven tools integration.

Responsibilities

• Design, implement, and evolve high-quality software services and components for scalable products.
• Lead end-to-end delivery of complex features across services or domains.
• Collaborate with product, architecture, and engineering teams to align on technical direction.
• Improve reliability, performance, security, and observability of services.
• Mentor engineers through design reviews and knowledge sharing.
• Safely integrate and operate AI/ML-enabled solutions per Expedia Group standards.

Skills

Backend design

API design

System architecture

End-to-end delivery

Mentoring engineers

AI/ML familiarity

Education

Bachelor’s degree in CS/Engineering or equivalent

Tools

REST APIs

CI/CD

Monitoring & observability

Source control

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.

About the team

Expedia Group Advertising is redefining how travel brands connect with global audiences. Our Publishing Team owns the end-to-end delivery of display and travel ads across Expedia’s white‑label and partner platforms. We’re building the next generation of video ad infrastructure, AI‑powered tooling, and Rapid API integrations to deliver smarter, more engaging ad experiences.

In this role, you will:

• Design, implement, and evolve high‑quality software services and components, including system design, low‑level design, API design, and data modeling to support scalable, reliable products.
• Lead end‑to‑end delivery of complex technical features across services or domains, including requirements clarification, solution design, development, testing, deployment, and ongoing operational support.
• Collaborate closely with product, architecture, and cross‑functional engineering teams to define technical direction, align on standards, and ensure solutions meet business and customer needs.
• Improve the reliability, performance, security, and observability of services through robust engineering practices, including code reviews, automated testing, CI/CD, and production monitoring.
• Mentor and support other engineers through technical guidance, design reviews, and knowledge sharing, helping to raise the overall technical bar across the team and adjacent teams.
• 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 alignment with Expedia Group standards.

Minimum Qualifications

• Bachelor’s degree in Computer Science, Engineering, or a related technical field, or equivalent practical experience.
• Professional software engineering experience that includes ownership of significant services or components within a multi‑service or domain environment.
• Proven proficiency in designing and building backend or full‑stack systems, including RESTful or similar APIs, data models, and integration patterns using industry‑standard languages, frameworks, and tooling.
• Experience applying sound software engineering practices such as object‑oriented or functional design, automated testing, code review, source control, and continuous integration/continuous delivery for production systems.
• Hands‑on experience supporting services in production, including monitoring, troubleshooting, and resolving issues to maintain availability and performance, with familiarity using or integrating AI‑driven tools in development or operations workflows.

Preferred Qualifications

• Experience designing and evolving distributed, high‑traffic or large‑scale systems, including making architectural tradeoffs related to performance, reliability, and cost within a service or domain.
• Demonstrated leadership in driving technical design for complex initiatives, such as defining APIs, data contracts, and low‑level designs that are extensible and maintainable across multiple services or teams.
• Strong focus on operational excellence, including building observability, resiliency patterns, and automation into services, and using data and metrics to guide technical decisions and continuous improvement.
• Familiarity with AI‑driven systems, tools, or workflows and applying AI/ML concepts to real world products, including safely integrating and operating AI/ML‑enabled solutions that improve customer or business outcomes.
• Experience serving as a technical mentor or lead for projects, enabling cross‑team collaboration, guiding implementation quality, and contributing to or influencing engineering standards and best practices.

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.

Expedia Group (NASDAQ: EXPE) powers travel for everyone, everywhere through our global platform. Driven by the core belief that travel is a force for good, we help people experience the world in new ways and build lasting connections.

We provide industry‑leading technology solutions to fuel partner growth and success, while facilitating memorable experiences for travelers.

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™.

For more information, visit www.expediagroup.com.