Software Development Engineer II, Advertising Technology

About the 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 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

Requirements

• 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 archite

Benefits

Additional Information

Expedia Group brands power global travel for everyone, everywhere. We design cutting-edge tech to make travel smoother and more memorable, and we create groundbreaking solutions for our partners. Our diverse, vibrant, and welcoming community is essential in driving our success. Why Join Us? To shape the future of travel, people must come first. Guided by our Values and Leadership Agreements, we foster an open culture where everyone belongs, differences are celebrated and know that when one of us wins, we all win. We provide a full benefits package, including exciting travel perks, generous time-off, parental leave, a flexible work model (with some pretty cool offices), and career development resources, all to fuel our employees' passion for travel and ensure a rewarding career journey. We're building a more open world. Join us. Our Technology Team partners with teams across Expedia Group to create innovative products, services, and tools to deliver high-quality experiences for travelers, partners, and our employees. A singular technology platform powered by data and machine learning provides secure, differentiated, and personalized experiences that drive loyalty and traveler satisfaction. Our Team We are the Expedia Group Advertising team. As a global leader in travel industry advertising, we connect advertisers with millions of travelers. This is a rapidly growing area of the business, with strong year-over-year growth, and a key area of long-term investment. Within this organization, you'll join the Advertiser Team, which owns the advertiser-facing portal and the backend services and APIs that power it. These systems enable advertisers and third-party partners to configure, manage, and optimize ad campaigns across Expedia Group platforms. You will work collaboratively with engineers, product, and cross-functional partners across a globally distributed organization to build impactful solutions for advertisers and travelers worldwide.

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