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# Software Development Engineer II

- **Company:** Expedia Inc.
- **Location:** Chicago, IL, United States
- **Experience:** Experienced
- **Salary:** $111,000 - $155,500
- **Contract:** Permanent contract
- **Skills:** Java (Programming Language), Application Programming Interfaces (APIs), Artificial Intelligence, Code Review, Data Structures, Software Debugging, Software Design Documents, Distributed Systems, Enterprise Messaging Systems, Performance Tuning, Software Construction, Software Engineering, Data Streaming, GitHub Copilot, ReactJS, Backend, Kotlin, Information Technology, Code Testing, Apache Flink, Apache Kafka, Graphql, Front End Software Development, Claude, Api Design, Stream Processing
- **Published:** November 5, 2026
- **Apply:** https://www.careerbuilder.com/job-details/software-development-engineer-ii-chicago-il--4cd7261b-85ee-4fa2-a958-2c5c20dd10de

## About the Role

Software Development, Software Engineering, Willing to Travel, Advertising, Consumer Branding, Travel Industry, Business-to-Business (B2B), Technical Leadership, Campaigns, Application Programming Interface (API), * Bachelor's degree in Computer Science, Engineering, or related technical field, or equivalent practical experience

 * 3+ years of software development experience building and supporting production systems and services
 * Strong foundation in data structures, algorithms, and core computer science fundamentals
 * Experience owning components or services, including implementation, testing, deployment, and operational support
 * Experience designing and building scalable backend systems and APIs
 * Proficiency in one or more of the following: Java, Kotlin (or ability to ramp quickly), and familiarity with React
 * Experience with API design and consumption, including REST and/or GraphQL
 * Experience working across multiple technical systems or services, with the ability to debug and deliver maintainable solutions, * Experience building software for advertising technology, marketplaces, or other high-scale distributed systems
 * Experience with event streaming or messaging systems (e.g., Flink, Kafka, or similar real-time data processing technologies)
 * Experience contributing to architecture and design discussions for services, APIs, and data models
 * Demonstrated ability to improve service quality through performance tuning, observability, and automation
 * Experience using metrics and data to inform engineering decisions and measure impact
 * Familiarity with AI-driven systems and/or AI-assisted development tools (e.g., GitHub Copilot, Claude)
 * Experience building customer-facing features, including frontend development with React
 * Background working on large-scale, high-throughput systems or platforms

What You'll Bring

 * A strong sense of ownership, with a track record of delivering solutions end-to-end
 * Ability to collaborate effectively across teams and contribute to a highly collaborative engineering culture
 * Passion for building scalable, high-performance systems and improving the developer and customer experience
 * Interest in solving complex problems in a fast-growing, high-impact area of the business

## Description

As a Software Development Engineer II, you will play a critical role in building and scaling high-performance systems that support Expedia Group's expanding advertising network. This role is primarily backend-focused (approximately 70-80%), with some frontend development (20-30%) supporting customer-facing experiences built in React.

You will contribute to a multi-year initiative to design and evolve a unified advertising platform, consolidating multiple ad products into a single, scalable system. Your work will directly influence advertiser experiences and shared capabilities across the platform.

In This Role, You Will

 * Design, build, test, and maintain scalable backend services and APIs that power the advertiser portal and enable third-party integrations
 * Contribute to the development of a unified ads platform, delivering reusable capabilities across multiple advertising products
 * Own features and services end-to-end-from design and implementation to deployment and operational support
 * Apply strong coding fundamentals to deliver high-quality, maintainable, and extensible solutions
 * Participate in system design, low-level design, API design (including GraphQL), and data modeling
 * Build customer-facing features (primarily backend-driven, with some React frontend contributions)
 * Drive improvements in scalability, performance, and reliability for high-traffic advertiser systems
 * Collaborate with engineering, product, operations, and globally distributed teams to translate business needs into technical solutions
 * Troubleshoot production issues and improve system health through monitoring, debugging, automation, and observability practices
 * Write secure, well-tested code, participate in code reviews, and follow engineering best practices
 * Leverage AI-enabled solutions and AI-assisted development tools to improve developer productivity and product outcomes