Senior Software Development Engineer

Salary: £70,000 - 110,000 per year

Requirements:

• Bachelors degree in Computer Science or a related technical field; or equivalent related professional experience.
• 8+ years of relevant professional software development experience with a strong focus on backend development, using Java or Kotlin, building and operating high-performance, high-throughput, highly available, and scalable services on cloud platforms.
• Proven experience owning one or more production services or components throughout their lifecycle, including system design, API design, data modeling, implementation, deployment, monitoring, and ongoing operational responsibility.
• Demonstrated ability to understand complex distributed systems, design moderately complex solutions, and make well-reasoned technology choices that are easily testable and observable, with clear alignment to business outcomes and team goals.
• Strong knowledge of integration patterns, testing and monitoring tools, and operational excellence practices, such as unit testing, SLAs, resiliency and scalability patterns, and alerting.
• Experience formally mentoring at least three engineers.
• Experience designing and evolving distributed or multi-service architectures for pricing, offers, or similarly high-scale transactional domains, with a focus on reliability, fault tolerance, and performance optimizations driven by production metrics.
• Demonstrated technical leadership in defining architectural direction for complex features or systems, influencing design patterns and frameworks, guiding cross-team integrations, and communicating trade-offs to both technical and non-technical stakeholders.
• Track record of improving operational excellence at the team level through enhanced observability, automation, performance tuning, and data-driven analysis of incidents and customer impact.
• Hands-on experience integrating or consuming AI/ML-enabled services or platforms in production, including designing safe interaction patterns, monitoring their impact on pricing or customer experience, and tuning models or policies to achieve better business outcomes.
• Familiarity with applying AI-assisted development or testing tools in everyday engineering workflows to enhance developer productivity, code quality, and time to market, particularly for backend services and platform capabilities in complex domains.

Responsibilities:

• Design, build, and evolve robust, scalable, and secure backend services and applications, including clear low-level and high-level designs, APIs, data models, and explicit technical trade-offs that power high-traffic, customer-facing pricing and offers experiences across our brands.
• Lead end-to-end implementation of complex features and systems within the Offers Domain, from technical design and coding through testing, deployment, monitoring, and ongoing operational support, ensuring simple, accurate, and transparent pricing throughout the shopping and booking journey.
• Partner closely with product, architecture, and cross-functional engineering teams to translate business and regulatory requirements into technical solutions, shaping capabilities that support locally relevant customer expectations and can be reused across multiple brands and platforms.
• Drive engineering excellence for the services we own by championing code quality, automated testing, observability, performance optimization, and simplification, taking technical responsibility for service health, scalability, resilience, and the ongoing reduction of technical debt and operational overhead.
• Provide technical mentorship and guidance to other engineers, sharing domain and industry knowledge, guiding integrations across teams, and modeling best practices in system design, API design, and data modeling.
• Safely integrate and operate AI/ML-enabled solutions that improve outcomes, demonstrating familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real-world products while adhering to established patterns and guidelines.

Technologies:

• AI
• API
• Backend
• Cloud
• Support
• Java
• Kotlin
• Network

More:

We are Expedia Group, 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, helping 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—support a collaborative environment where people can grow their careers and have the flexibility, benefits, and support to do their best work. The Offers Domain team focuses on delivering simple, clear, accurate, and transparent pricing across the shopping and booking journey, and this role is based in UK - London on a full-time basis. Expedia Group includes Expedia, Hotels.com, and Vrbo, along with a leading B2B travel business and travel advertising offerings, and we are committed to an inclusive work environment and accessible recruiting experience.

last updated 34 week of 2026