Software Development Engineer II, Advertising Technology

Role 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 front‑end development (20–30%) supporting customer‑facing experiences built in React. 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 front‑end 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 Minimum Qualifications 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 Preferred Qualifications 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 Location: This role is only available in Seattle, WA, and requires employees to be in the office at least three days a week. Relocation assistance is not available. Pay: The total cash range for this position in Seattle is $119,000.00 to $166,500.00. Employees in this role have the potential to increase their pay up to $190,500.00 based on ongoing performance. Starting pay will vary based on location, budget, and experience. Benefits: Expedia Group offers a comprehensive benefits package including medical/dental/vision coverage, paid time off, an Employee Assistance Program, wellness & travel reimbursement, travel discounts, and an International Airlines Travel Agent (IATAN) membership. View our full list of benefits. Accommodation requests: If you need assistance with any part of the application or recruiting process due to a disability or other conditions, please reach out to our Recruiting Accommodations Team through the Accommodation Request. 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, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, veteran status, or any other characteristic protected by law. This employer participates in E‑Verify. The employer will provide the SSA and, if necessary, the DHS with information from each new employee’s I‑9 to confirm work authorization. #J-18808-Ljbffr Expedia, Inc.