Senior Software Development Engineer

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. Senior Software Development Engineer   Expedia Technology   teams   partner with our Product teams to create innovative products, services, and tools to deliver high-quality experiences for travelers, partners, and our employees. A singular technology platform powered by data and machine learning provides secure, differentiated, and personalized experiences that drive loyalty and traveler satisfaction.      The Senior Software Engineer role sits within the Universal Messaging Platform (UMP) team—Expedia Group’s core communications platform.   UMP powers high‑scale, reliable delivery across Email, SMS, Push, Inbox, and   emerging   channels, enabling   timely , trusted engagement with millions of travelers worldwide.   As a Senior Software Engineer on the Inbox Experience team, you will lead the architecture, development, and operation of mission‑critical systems that elevate traveler experience, strengthen loyalty, and drive business growth at   global   scale.   In this role, you will:   Design, build, and evolve scalable, reliable services and components, including system design, low-level design, API design, and data modeling to support high-traffic, customer- facing   and platform experiences.   Write, review, and   maintain   high-quality, well-tested code, driving engineering best practices in code quality, security, observability, and performance across the team.   Take end-to-end ownership of complex features or services, from technical design through implementation, deployment, monitoring, and iterative improvement in production.   Collaborate closely with product, design, and cross-functional engineering teams to break down ambiguous business problems into clear technical solutions that can be reused across multiple domains.   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.   Contribute to technical direction by   participating   in design reviews, proposing improvements to architecture and operational processes, and mentoring other engineers to raise the overall technical bar.

Bachelor’s degree in Computer Science   or a related technical field; or Equivalent related professional experience.   8+ years of relevant professional experience.   Proven experience owning services or components through the full software development lifecycle, including design, implementation, deployment, and on-call or operational support.   Proficiency   in at least one modern programming language and associated frameworks, with   strong   understanding of system design, API design, and data modeling concepts.   Expert   proficiency   in Java, Kotlin,   GraphQL ,   grpc , Spring boot   Strong experience building distributed systems, RESTful APIs, and microservices.   Experience with cloud platforms (AWS, GCP, or Azure) and containerization technologies (Docker, Kubernetes).   Familiarity with CI/CD pipelines, infrastructure code, and DevOps practices.   Experience working on systems that integrate with multiple services or domains, ensuring reliability,