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. Introduction to the Team: The Marketplace Health (MPH) organization supports services, processes, and data analytics that maximize positive outcomes in EG’s marketplace for both travellers and supply partners. We are a group of product and engineering delivery teams situated in Expedia Marketplace (Design & Trust), focused on the  health  (the state of well-being, free from issues) and  trust  (firm belief in the reliability, truth, ability, or strength of someone or something) of the Expedia travel marketplace. In this role, you will: Design, develop, and maintain highly available, scalable, and resilient services and applications, including clear low-level designs, robust APIs, and effective data models Own end-to-end technical solutions across multiple services or components, ensuring code quality, observability, security, and operational readiness Collaborate with product, design, and cross-functional engineering teams to translate business and customer requirements into technical solutions that can be reused across domains Lead code and design reviews, drive engineering best practices, and mentor other engineers to improve technical execution and maintain high standards Diagnose complex production issues, improve reliability and performance through data-driven analysis, and enhance CI/CD pipelines and operational tooling 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   Experience and Qualifications:

Bachelor’s degree in Computer Science or a related technical field; or equivalent related professional experience 8+ years of relevant professional experience Significant professional software development experience designing and building services or applications in a production environment. Proven experience owning end-to-end delivery of services or components, including design, implementation, testing, deployment, and operational support Strong proficiency in at least one modern programming language and familiarity with system design (including low-level design), API design, and data modeling   Preferred Qualifications: Experience designing and evolving the architecture of multi-service or domain-level systems, including well-structured APIs, data models, and integration patterns Demonstrated success improving performance, reliability, and scalability of high-traffic or mission-critical systems using data-driven analysis and experimentation Experience driving engineering excellence initiatives such as test automation, CI/CD improvements, security hardening, and operational best practices Hands-on experience integrating or operating AI/ML‑enabled capabilities within production services or workflows, including responsible use of AI to enhance user or business outcomes. Familiarity with AI-driven developer productivity or observability tools and applying AI-related techniques in a way that is appropriate and safe for large-scale software systems Accommodation requests Expedia Group is committed to providing an inclusive and accessible recruiting experience. If you need an accommodation or adjustment due to a