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 Ordering Services Team at Expedia Group is seeking an experienced backend engineer and seasoned technologist with a passion for building robust, scalable, and high‑performance ordering systems that power millions of trip bookings every day across Expedia Group brands. We sit at the heart of Expedia's core transaction and ordering domain. Our services orchestrate the end‑to‑end lifecycle of a trip order—from checkout, through booking, payments, and post‑booking servicing—across lodging, air, car, activities, and packages. Every successful trip starts with a reliable order. The Ordering Platform powers a high‑throughput, low‑latency transaction engine that processes millions of orders and order updates per day. We expose domain‑driven APIs that other Expedia Group experiences and platforms build on, ensuring that orders are consistent, resilient, and auditable across channels and brands. Join us as we evolve and scale the ordering domain that powers Expedia Group’s global travel marketplace. In this role, you will: Design and develop complex software systems and services, applying advanced system design, API design, and data modeling techniques Lead the implementation of scalable, reliable, and maintainable solutions across multiple domains or platforms Mentor and grow junior and mid-level engineers—through code reviews, pairing, design feedback, and career guidance—raising the technical bar and helping the team level up Drive technical excellence across the team by setting engineering standards, championing best practices in testing, observability, and operational readiness, and holding a high quality bar in design and code reviews Own key technical decisions and architectural direction for the ordering domain, building consensus across engineers and stakeholders Collaborate with cross-functional teams to translate business requirements into robust technical solutions Safely integrate and operate AI/ML-enabled solutions that improve outcomes, ensuring responsible and effective use of AI technologies Foster a culture of continuous improvement by identifying opportunities to optimize processes, code quality, and system performance Minimum Qualifications: Bachelor's degree in Computer Science or a related technical field; or Equivalent related professional experience 8+ years of professional backend software development experience in an object‑oriented language (e.g., Java, Kotlin, or similar) Demonstrated ownership of services, multi-service architectures, or domain solutions at an organizational level Proven expertise in advanced system design, API development, and data modeling for large-scale distributed systems Familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products Preferred Qualifications: Deep experience designing, scaling, and operating distributed systems in production environments Track record of providing technical leadership and driving architectural decisions for complex projects Proactive in optimizing software for performance, reliability, and security at enterprise scale Strong data-driven decision-making skills and a commitment to operational excellence Experience leveraging