Software Development Engineer II

Expedia Group•Seattle, WA

2d•$119,000 - $190,500

About The Position

The Software Development Engineer II is part of Expedia Group’s Servicing team, which builds agentic AI systems for traveler self-service across Expedia brands and partners. The role designs, builds, and operates agents and supporting infrastructure that help travelers resolve complex servicing needs end-to-end without human intervention. Work includes agent orchestration, tool integration, LLM-powered reasoning pipelines, and reliable backend services at scale. The engineer collaborates with Product, XD, and Program Management to shape technical direction and traveler experiences. The position owns features end-to-end, contributes to technical design, and promotes engineering quality through testing, observability, and operational excellence. It involves building secure, scalable services; delivering production code; collaborating in an Agile environment; monitoring and supporting services; applying secure coding practices; improving shared engineering tools and platforms; and working with AI-driven systems and workflows.

Requirements

Bachelor's degree in Computer Science, Computer Engineering, or a related technical field, or equivalent practical experience in software development.
Professional software engineering experience building, testing, and operating backend, frontend, or full-stack services or applications, including ownership of at least one significant production service or feature.
Proficiency in at least one modern programming language used at Expedia Group.
Familiarity with service-oriented or microservices architectures, including API design, data modeling, and low-level system design.
Experience with version control, automated testing, code review, debugging, and monitoring in a collaborative Agile team environment.
Familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real-world products.

Nice To Haves

Experience designing and evolving services or components that support multiple use cases or products, including effective API contracts, data models, and integration patterns across teams.
Track record of improving production-system performance, reliability, or cost efficiency through data-driven analysis, observability, and systematic incident prevention and resolution.
Hands-on experience with cloud-based infrastructure, deployment pipelines, and configuration management to build, release, and operate services at scale.
Ability to leverage AI-assisted development tools, code generation, or intelligent automation to improve engineering velocity while maintaining code quality and safety.
Experience incorporating or consuming AI/ML-enabled capabilities within applications or services, including safely integrating and operating them in production environments.

Responsibilities

Design, implement, and maintain reliable, scalable, and secure services and components using Expedia Group standard technologies, including clean APIs, robust data models, and well-factored low-level designs.
Deliver high-quality production code through test automation, code reviews, and continuous integration practices for services operating across multiple products or domains.
Collaborate with peers, product managers, technical program managers, and other partners to refine requirements, break down complex problems, and deliver incremental value in an Agile environment.
Instrument services to monitor performance, reliability, and availability; triage and resolve production issues; and participate in on-call or support activities.
Apply secure coding practices and engineering standards, and contribute to shared libraries, tooling, or platforms that accelerate development for multiple teams.
Work with AI-driven systems, tools, or workflows to improve developer productivity and product capabilities, including safely integrating and operating AI/ML-enabled solutions.
Own features end-to-end and contribute to technical design, testing, observability, and operational excellence.