Software Development Engineer III, Advertising Technology

Expedia•Chicago, IL

1d•Hybrid

About The Position

Expedia Group Advertising builds the platforms and experiences that connect advertisers with millions of travelers across the globe. Our mission is to help partners reach the right traveler with the right message at the right time through intuitive advertiser experiences, high-performance ad delivery systems, and intelligent, AI-powered optimization. We are growing our Advertiser Experience engineering team and are looking for a talented, product-minded Software Development Engineer III who is excited to build thoughtful advertiser-facing experiences and the backend services that power them. You will help shape the next generation of our advertising marketplace, working at the intersection of user experience, scalable distributed systems, and generative AI.

Requirements

5+ years for Bachelor's degree or 3+ years for Master's in a related technical field; or equivalent related professional experience
5+ years of experience in backend software development, working with cloud-based and distributed systems at scale
Proficiency in Java/J2EE, C#, or similar object-oriented languages, with hands-on experience integrating services with relational and NoSQL databases
Experience with CI/CD pipelines, infrastructure/test automation, and delivering features in Agile development environments
Demonstrated experience designing and deploying scalable services in a cloud environment (e.g., AWS, Azure, GCP)

Nice To Haves

Exposure to advertising technologies (ad serving, campaign management, RTB, auctions)
Experience with event streaming or messaging systems (e.g., Flink, Kafka, or similar real-time data processing technologies)
Experience working with data-driven systems, ML-powered features, or experimentation platforms
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
Experience applying generative AI to product experiences and internal tools
Experience contributing to multiple multi-quarter, cross-team projects
A Master's degree in a related technical field

Responsibilities

Implement backend APIs and services that power high-quality UI experiences and deliver trust, transparency, and performance to our partners
Build and optimize services that support campaign management and optimization across Expedia Group’s advertising network
Improve reliability, scalability, and latency of mission-critical systems
Use LLMs and generative AI to simplify advertiser workflows, improve campaign setup, and automate repetitive tasks
Work with data scientists and ML engineers to integrate personalized recommendations, smart defaults, and AI-assisted decision support
Partner with product managers, UX designers, data scientists, and other engineering teams to deliver measurable advertiser value
Leverage AI-enabled solutions and AI-assisted development tools to improve developer productivity and product outcomes
Advocate for high-quality code, automated testing, and strong observability practices
Participate in operational reviews and drive continuous improvement
Mentor junior engineers and help elevate the technical bar of the team