Software Development Engineer III - Full Stack

Expedia Expedia · Hospitality · Seattle, WA

Full Stack Software Engineer for Expedia's critical production checkout applications, focusing on ensuring speed, availability, scalability, and engineering robustness. The role involves designing, implementing, and maintaining services, writing clean code, owning end-to-end feature delivery, diagnosing production issues, and collaborating with cross-functional partners. A key aspect is safely integrating and operating AI/ML-enabled solutions, requiring familiarity with AI-driven systems and applying AI/ML concepts.

What you'd actually do

  1. Design, implement, and maintain robust, secure, and scalable services and applications, including system design (LLD), API design, and data modeling to support business-critical capabilities across multiple domains.
  2. Write clean, reliable, and well-tested code, applying sound engineering principles, design patterns, and code review practices to improve quality, performance, and maintainability for complex systems.
  3. Own end-to-end delivery of features and services, from technical design and implementation through deployment, monitoring, and iteration, ensuring high availability and operational excellence.
  4. Diagnose and resolve complex production issues, perform root cause analysis, and drive long-term improvements in reliability, observability, and resilience across services and dependencies.
  5. Collaborate with cross-functional partners, contributing technical expertise to product discovery, backlog prioritization, and data-driven decision making while ensuring solutions are reusable and fungible across multiple domains.
  6. 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.

Skills

Required

  • Bachelor’s degree in Computer Science or a related technical field; or Equivalent related professional experience.
  • 5+ years of relevant professional experience.
  • Professional software development experience building and maintaining services or applications, with ownership of features or services in production environments.
  • Proficiency in at least one modern programming language and core computer science fundamentals (data structures, algorithms, design, and problem solving), including experience with system design (LLD), API design, and data modeling.
  • Experience owning the full software development lifecycle for services or applications, including design, implementation, code reviews, testing, deployment, and monitoring, including familiarity with AI-driven systems, tools, or workflows and applying AI/ML concepts to real world products at a foundational level.

Nice to have

  • Full-stack engineer with proficiency in JavaScript, TypeScript, React, Java/Kotlin, and GraphQL.
  • Experience maintaining and operating at least four software projects or products in production environments, including bug fixing, troubleshooting, monitoring, and operational support.
  • Experience selecting technologies to solve business problems and understanding trade‑offs between languages and platforms.
  • Experience creating APIs consumed across teams or business units.
  • Solid understanding of how projects and teams interact with other teams and align to business needs.
  • Experience testing, monitoring, debugging, and fixing issues within defined SLAs.
  • Experience with AI-enabled software development workflows.

What the JD emphasized

  • applying AI/ML concepts to real world products
  • familiarity with AI-driven systems, tools, or workflows
  • applying AI/ML concepts to real world products at a foundational level
  • Experience with AI-enabled software development workflows