Software Development Engineer III, Advertising Technology

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.

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.

• Optimize auction and ad retrieval to surface more relevant ads and grow advertisers reach to our travelers

• Implement backend APIs and services that power high‑quality UI experiences and deliver trust, transparency, and performance to our partners

• Build and scale services that support ad serving, ad selection, and campaign management across Expedia Group’s advertising network

• Improve reliability, scalability, and latency of mission‑critical systems

• Work closely with ML and data teams on features such as relevance optimization, targeting, and performance modeling

• Work with data scientists and ML engineers to integrate personalized recommendations, smart defaults, and AI‑assisted decision support

• Use LLMs and generative AI to simplify advertiser workflows, improve campaign setup, and automate repetitive tasks

• Partner with product managers, data scientists and other engineering teams to deliver measurable advertiser value

• 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

• Bachelor’s degree in Computer Science or a related technical field; or Equivalent related professional experience

• 5+ years of relevant professional experience

• Strong proficiency in at least one modern programming language (e.g., Java, Kotlin)

• Experience building and maintaining backend services, APIs (gRPC/Protobuf), or microservices in cloud environments

• Solid understanding of distributed systems, data flows, and operational best practices

• Familiarity with AI‑driven systems, tools, or workflows and applying AI/ML concepts to real‑world products

• Experience with tools and frameworks like gRPC, Apache Flink, Spark.

• Experience with advertising technologies (ad serving, campaign management, RTB, auctions)

• Experience working with data‑driven systems, ML‑powered features, or experimentation platforms

• Experience working with applying generative AI to product experiences and internal tools

• Strong problem‑solving skills and the ability to reason through ambiguous requirements

• A product-minded approach — you care about the “why” behind the code

• Excellent communication and collaboration skills

• A growth mindset and desire to continuously improve

The total cash range for this position in Seattle is $ to $. Employees in this role have the potential to increase their pay up to $, which is the top of the range, based on ongoing, demonstrated, and sustained performance in the role.

Starting pay for this role will vary based on multiple factors, including location, available budget, and an individual’s knowledge, skills, and experience. Pay ranges may be modified in the future.

If…