Software Development Engineer III, Advertising Technology

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’re seeking a Software Development Engineer III to join our Advertising Technology team. You’ll build and operate real-time ad delivery systems that power ad ranking, auctions, bidding, and budget enforcement at scale. These services sit on the critical path of ad delivery, where low latency, correctness, and reliability directly impact revenue, advertiser ROI, and traveler experience. You’ll work with Product, Machine Learning, Data Science, and Platform teams to integrate with APIs and microservices, bring ML-driven signals into high-throughput backend services, and scale the platform as the business grows.

Responsibilities

  • Optimize bidding, ranking and pacing for guaranteed and non-guaranteed ad delivery to surface more relevant ads and expand advertiser reach to travelers
  • Build and scale systems that support ad serving and ad selection across Expedia Group’s advertising network
  • Apply strong software design principles, algorithms, and data structures to build scalable, low-latency, high-throughput services.
  • Work closely with Product, ML data scientists and data teams on features such as relevance optimization, targeting, and performance modeling
  • Advocate for high-quality code, automated testing, and strong observability practices
  • Participate in operational reviews and drive continuous improvement
  • Mentor junior engineers, lead design discussions, and help elevate the technical bar of the team

Requirements

  • Bachelor's or Master’s degree in Computer Science or a related technical field
  • 5+ years of experience in backend software development
  • Experience working with data-driven systems, ML-powered features, or A/B experimentation platforms
  • Strong proficiency in Java or Kotlin
  • Experience building and deploying backend APIs (e.g. gRPC) and streaming or batch data processing services (e.g., Flink, Spark) in cloud environments
  • Solid understanding of distributed systems, data flows, and operational best practices

Nice-to-haves

  • Experience with search and retrieval systems, including relevance ranking, vector databases, embeddings, or AI/semantic search
  • Experience designing and implementing agent-to-agent (A2A) and multi-agent AI systems
  • Background in ads, marketplaces, e-commerce, or travel platforms

Benefits

  • medical, dental, and vision coverage
  • paid time off
  • an Employee Assistance Program
  • wellness and travel reimbursement
  • travel discounts
  • International Airlines Travel Agent Network (IATAN) membership
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Common Interview Questions And Answers

1. HOW DO YOU PLAN YOUR DAY?

This is what this question poses: When do you focus and start working seriously? What are the hours you work optimally? Are you a night owl? A morning bird? Remote teams can be made up of people working on different shifts and around the world, so you won't necessarily be stuck in the 9-5 schedule if it's not for you...

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When you're working on a remote team, there's no way to chat in the hallway between meetings or catch up on the latest project during an office carpool. Therefore, virtual communication will be absolutely essential to get your work done...

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With this question, companies are looking to see what equipment they may need to provide you with and to verify how aware you are of what remote working could mean for you physically and logistically...

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The day I watched Marie Forleo's film separating the important from the urgent, my life changed. Not all remote jobs start fast, but most of them are...

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