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Roku Logo Roku · IT - Software Development

Senior Software Engineer, Ad Auctions

United Kingdom, Cambridge · Job Posted July 04, 2026
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Job Description

Roku is the #1 TV streaming platform in the U.S., Canada, and Mexico, and we've set our sights on powering every television in the world. Roku pioneered streaming to the TV. Our mission is to be the TV streaming platform that connects the entire TV ecosystem. We connect consumers to the content they love, enable content publishers to build and monetize large audiences, and provide advertisers unique capabilities to engage consumers. From your first day at Roku, you'll make a valuable - and valued - contribution. We're a fast-growing public company where no one is a bystander. We offer you the opportunity to delight millions of TV streamers around the world while gaining meaningful experience across a variety of disciplines.

Job Responsibility

  • Lead the design, implementation, and evolution of real-time ads auction systems powering Roku’s CTV advertising across The Roku Channel and the Roku platform
  • Own and enhance core auction capabilities including ad pod construction, bid evaluation, ranking, pricing, pacing, budget enforcement, and frequency capping
  • Build low-latency, highly reliable distributed services that operate at massive scale and serve billions of ad opportunities with strict latency and uptime requirements
  • Design auction logic that balances viewer experience with advertiser performance, publisher yield, and platform revenue
  • Develop and optimize SSP-side auction mechanisms and integrate with multiple DSPs, programmatic demand sources, and direct-sold campaigns
  • Partner closely with product managers, data science, and ads research teams to translate marketplace and monetization goals into scalable technical solutions
  • Drive yield optimization through auction design, demand shaping, floor strategies, and pricing experiments
  • Lead experimentation using A/B testing, auction simulations, and offline replay frameworks, and make data-driven decisions using statistical rigor
  • Ensure auction correctness, fairness, explainability, and transparency while maintaining compliance with privacy, regulatory, and brand-safety requirements
  • Influence the long-term technical roadmap for Roku Ads by proposing architecture improvements, scalability strategies, and performance optimizations

Requirements

  • 5+ years of experience building large-scale distributed systems
  • 5+ years of experience working with cloud-based platforms and infrastructure
  • Deep experience building microservices in Java for container platforms such as Docker or Kubernetes
  • Solid understanding of SQL and NoSQL databases
  • Hands-on experience with AWS, GCP, or similar cloud services
  • Experience with protocols and data formats such as REST, WebSockets, HTTPS, JSON, and Protobuf
  • Demonstrated ability to drive timely consensus in design with senior engineering partners
  • Bachelor’s or Master’s degree in Computer Science, Engineering, or an equivalent field

What we offer

  • global access to mental health and financial wellness support and resources
  • healthcare (medical, dental, and vision)
  • life, accident, disability, commuter, and retirement options (401(k)/pension)
  • time off in accordance with local leave policies
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