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
Supply Partner Experience (SPX) is the part of Expedia Group that builds the tools and services our lodging and travel partners use to run their business with us. Within SPX, Run The Business (RTB) teams focus on keeping those day-to-day partner experiences reliable, improving them over time, and making sure the core systems behind them are simple to operate and ready to scale. Quokkas is an Australia-based engineering team in RTB Australia, sitting at the intersection of partner domain, product delivery, and platform services. We own core systems that keep partner data, legal entities, business profiles, and partner-facing workflows reliable across Expedia Group. As our engineers embed into RTB Australia product squads such as Contracting and Arrivals, we continue to carry and evolve Quokkas-owned partner-domain capabilities while simplifying legacy platform dependencies and strengthening the foundations that other teams rely on every day.

As a Senior Developer in Quokkas, you will shape the backend services and event-driven systems that sit at the heart of Expedia's partner experience, helping RTB Australia product teams build on a trusted foundation for partner data, business profiles, and operational workflows. The systems you design, build, and operate will directly influence how quickly and safely we can onboard partners, support contracting and partner-facing product experiences, and maintain reliable downstream integrations across RTB, platform, and operational domains. In this role, you will play a key part in improving reliability, observability, resilience, and cost efficiency, while leading cross-team technical initiatives, setting strong engineering standards across RTB Australia squads, and mentoring other engineers in the effective use of modern automation and AI-assisted development practices.

In this role, you will:

• Design, build, and maintain complex, highly available services and applications, including robust system design (low-level design), API design, and data modeling across multiple domains.

• Lead end-to-end delivery of features and services, from technical design and implementation through deployment, monitoring, and ongoing optimization in production environments.

• Improve technical quality and operational excellence by driving code quality standards, reducing incidents, enhancing observability, and optimizing performance and reliability.

• Mentor and guide other engineers, sharing best practices in software engineering, testing, and architecture, and fostering a culture of continuous improvement and learning.

• Collaborate with product, design, data, and other engineering teams to translate business and customer problems into scalable technical solutions that can be reused across 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.

• Participate in the RTB AU on-call rotation and support queue (approximately 1 week in every 6 weeks), using strong observability, SLO, and incident-management practices to keep critical partner-facing services reliable

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)

• Proven experience owning end-to-end delivery for services or components, including design, implementation, testing, deployment, and support within a multi-service or domain environment.

• Strong proficiency in at least one modern programming language and core software engineering practices, including object-oriented design, data structures, algorithms, testing, and version control.

• Hands-on experience designing and consuming APIs, working with data models and storage systems, and applying system design principles to build reliable and maintainable systems.

Preferred Qualifications:

• Experience designing and evolving service and application architectures for high-traffic, distributed systems, including clear API contracts, data models, and low-level designs.

• Demonstrated track record driving technical direction for services or domains, making data-informed tradeoffs on scalability, reliability, performance, and cost.

• Strong focus on operational excellence, including monitoring, alerting, incident response, and continuous improvement of production systems and developer workflows.

• Familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products, including safely integrating AI/ML‑enabled features into existing services.

• Experience leading cross-team technical initiatives or migrations, influencing engineering best practices across a domain, and mentoring others to grow their technical depth and delivery capability, including guiding teams

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.