Senior Software Development Engineer, AdTech

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

Job summary

Expedia Group is seeking a Senior Software Engineer to design, build, and evolve high-quality backend services. You will own critical components, shape API design, data models, and scalable platforms across multiple domains.

You will collaborate with product and architecture teams to deliver reliable, observable, and secure systems, mentor peers, and apply AI/ML-enabled approaches in line with Expedia Group standards.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, or related technical field or equivalent practical experience.
• Professional software engineering experience with ownership of significant services in a multi-service environment.
• Proven ability to design and build backend or full-stack systems with RESTful APIs and data models.
• Experience with software engineering practices: automated testing, code review, CI/CD, production systems.
• Hands-on experience supporting services in production, including monitoring and troubleshooting.

Responsibilities

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

Skills

Backend systems

REST APIs

CI/CD

Observability

AI/ML familiarity

Mentorship

Software design

Education

Bachelor's degree in Computer Science or Engineering

Tools

Java

Python

Go

Kubernetes

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.

Important notice

Employment opportunities and job offers at Expedia Group will always come from Expedia Group's Talent Acquisition and hiring teams. Never share sensitive personal information unless you are confident of the recipient. Expedia Group does not extend job offers via email or messaging tools to individuals with whom we have not made prior contact. Our email domain is @expediagroup.com. The official place to find and apply for roles is https://careers.expediagroup.com/jobs/.

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.