Senior Backend Engineer, Ad Tech & Real-Time Bidding

Expedia; United States; Hybrid; USD 136,000 - 191,000; Full time

Benefits offered by this job

Medical coverage

Dental coverage

Vision coverage

Paid time off

Employee Assistance Program

Wellness and travel reimbursement

Travel discounts

IATAN membership

Job summary

Expedia Group is 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.

You\'ll work with Product, ML data scientists, 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.

Qualifications

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

Responsibilities

• Optimize bidding, ranking and pacing for ad delivery to surface relevant ads.
• Build and scale systems for ad serving and ad selection across Expedia Group's advertising network.
• Apply design principles, algorithms, and data structures to low-latency services.
• Collaborate with Product, ML data scientists and data teams on features like relevance optimization and performance modeling.
• Advocate for high-quality code, automated testing, and observability.
• Mentor junior engineers and lead design discussions.

Skills

Java/Kotlin

Backend development

Distributed systems

Education

Bachelor's or Master's in CS

Tools

Flink

Spark

Cloud platforms

Job description

Expedia Group is 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.

You\'ll work with Product, ML data scientists, 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.