Software Development Engineer III - Full Stack

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. Our Technology Team partners with teams across Expedia Group 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. Introduction to the Team The Supply team builds and scales partner-facing technology that helps our partners succeed across the Expedia Group platform. We work at the intersection of product, engineering, and business operations to deliver reliable, high-impact solutions that improve partner experiences, enable growth, and support strategic initiatives across a global ecosystem. Our team values strong ownership, technical excellence, collaboration, and customer focus. We solve complex problems at scale, move quickly with purpose, and partner closely with cross-functional teams to deliver meaningful outcomes. Joining Supply means working on products and platforms that directly influence partner success and contribute to Expedia Group’s broader mission. In this role, you will: Design, build, and evolve full‑stack services and customer experiences, including system design (LLD), API design, and data modeling for scalable, secure, and reliable solutions. Implement high‑quality frontend and backend code, ensuring maintainability, observability, and operational excellence across multiple services and domains. Collaborate with product, design, and partner engineering teams to translate business and customer requirements into robust technical solutions that can be reused across use cases. Own and improve the end‑to‑end lifecycle of services and features, including development, automated testing, deployment, monitoring, and incident resolution. Apply data‑driven approaches to prioritize work, validate hypotheses, and continuously optimize system performance, reliability, and user experience. 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.

Bachelor’s degree in Computer Science, Engineering, or a related technical field, or equivalent practical experience in software development. 5+ years of professional experience building and operating production software services and full‑stack applications (frontend and backend) within a team environment. Proven ownership of services or components, including responsibility for design, implementation, quality, deployment, and operational health within a product or domain area. Proficiency in core software engineering fundamentals, including data structures, algorithms, system design (LLD), API design, and data modeling, with experience applying these in real systems. Hands-on experience with modern web technologies, frameworks, and service architectures, and familiarity with using AI-driven tools or workflows to enhance developer productivity or product capabilities.

Experience designing and evolving multi‑service or multi‑component architectures, including well‑structured APIs, data models,