Senior Software Development Engineer, AdTech

Salary: £70,000 - 110,000 per year

Requirements:

• Bachelors 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.
• 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.

Responsibilities:

• 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.

Technologies:

• AI
• API
• Backend
• CI/CD
• Support
• Security
• Network

More:

We are Expedia Group, a global travel company powered by passionate people, trusted partnerships, and leading technology. Our Advertising team is redefining how travel brands connect with global audiences, and our Publishing Team owns the end-to-end delivery of display and travel ads across our white-label and partner platforms. We are building the next generation of video ad infrastructure, AI-powered tooling, and Rapid API integrations to deliver smarter, more engaging ad experiences. We offer a supportive environment shaped by our five Behaviors—Traveler First, Think Big, Operate with Excellence, Ownership Mindset, and Succeed Together—along with flexibility, benefits, and support to help people do their best work. This full-time role is based in London, UK. We are committed to an inclusive and accessible recruiting experience and provide equal opportunity for all qualified applicants.

last updated 34 week of 2026