Software Development Engineer II – Backend

About the role

In this role you will design, build, and operate backend‑heavy full‑stack services for Expedia Group’s Modern Checkout platform, creating brand‑agnostic, product‑agnostic capabilities that serve hotels, flights, activities, and packages at global scale. You will own problems end‑to‑end across the stack, from clarifying requirements and producing low‑level designs, APIs, and data models through implementation, testing, deployment, and ongoing operational support.

Key responsibilities

• Design, build, and operate backend‑heavy full‑stack services for the Modern Checkout platform.
• Own problems end‑to‑end across the stack, including requirements, design, implementation, testing, deployment, and operational support.
• Develop and evolve microservices in a cloud‑native environment using Kotlin, Java, or C#/.NET, integrating with AWS data stores, caches, and streaming systems.
• Implement resilient, observable, high‑performance tier‑zero checkout services and contribute to CI/CD pipelines and automated testing.
• Collaborate with engineers, product managers, and partner teams to decompose legacy monoliths into a unified, reusable architecture across brands.
• Leverage AI‑assisted development tools and AI‑driven workflows to accelerate coding, testing, and troubleshooting, and safely integrate AI/ML‑enabled solutions.

Required profile

• Bachelor’s degree in Computer Science or a related technical field, or equivalent professional experience.
• At least 2 years of relevant professional experience.
• Demonstrated ownership of services or features through the full development lifecycle in a cloud environment.
• Strong coding, problem‑solving, and analytical skills with solid understanding of data structures, algorithms, and complexity.

Required skills

• Kotlin, Java, C#/.NET
• AWS cloud services
• Redis or similar caches
• DynamoDB (NoSQL)
• Kinesis (streaming/messaging)
• REST or GraphQL APIs
• JavaScript and React
• AI‑assisted coding tools such as Claude, Codex, or Cursor