Senior Software Development Engineer

Expedia, Inc.; City Of London; On-site; GBP 90,000 - 120,000; Full time

Job summary

Expedia Group is seeking an experienced backend engineer to design, build, and evolve scalable services for the Offers Domain. You will own end-to-end features from design through deployment, working with product, architecture, and cross-functional teams to deliver transparent, high-quality pricing and offers experiences across Expedia Group brands.

You will mentor engineers, champion code quality and testing, and apply AI/ML concepts to real-world pricing workflows while maintaining

Qualifications

• Bachelor’s degree in Computer Science or a related technical field or equivalent professional experience.
• 8+ years of software development experience with a focus on backend development in Java or Kotlin.
• Experience owning production services including design, API design, data modeling, deployment, monitoring, and operations.
• Strong understanding of distributed systems and observable, testable designs.
• Experience mentoring engineers and implementing integration patterns, testing, and observability.

Responsibilities

• Design, build, and evolve robust, scalable, and secure backend services and applications across Expedia Group brands.
• Lead end-to-end implementation of complex features within the Offers Domain, from design to deployment and monitoring.
• Collaborate with product, architecture, and cross-functional teams to translate requirements into scalable technical solutions.
• Drive code quality, automated testing, observability, performance optimization, and reduction of technical debt.
• Provide technical mentorship to engineers and guide integrations across teams.
• Safely integrate and operate AI/ML-enabled solutions in production while adhering to patterns and guidelines.

Skills

Backend development

Java or Kotlin

Distributed systems

Code quality & testing

Mentoring engineers

AI/ML familiarity

Education

Bachelor’s degree in Computer Science or related field

Tools

Cloud platforms

API design

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.

Team Summary:

Price is a key factor influencing traveler’s path to driving a choice leading to a purchase. In a world of infinite paths to purchase, travelers make multiple searches and find the ‘best trip’ and ‘best deal’. The Offers Domain team is tasked with giving the customer a simple, clear, accurate, transparent pricing throughout their shopping and booking journeys. We do this by putting the customer first, creating capabilities that can be shared and presented to the customer that meet the travelers’ expectations in locally relevant ways and adhere to regulatory norms. This is a great opportunity for you to play a pivotal role in shaping our technical domain with the goal of powering all Expedia Group’s brands and product lines.

In this role, you will:

• 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 Expedia Group 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 you 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.

Minimum Qualifications:

• Bachelor’s 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 (with low-level 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), with experience formally mentoring at least three engineers.

Preferred Qualifications:

• 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.

In this role, you will:

• Design, build, and evolve robust, scalable, and secure backend services and applications, including clear low-level designs, APIs, and data models that power high-traffic, customer-facing pricing and offers experiences across Expedia Group 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 you own by championing code quality, automated testing, observability, and performance optimization, taking technical responsibility for the health, scalability, and resilience of the codebase.
• 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.

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.