Senior Software Engineer, Ad Auctions

<div class="content-intro"><h2 style="font-family: GothamBold,Helvetica,Arial,sans-serif; color: #662d91;">Teamwork makes the stream work.</h2> <p>&nbsp;</p> <h3 style="font-family: GothamBold,Helvetica,Arial,sans-serif;"><strong>Roku is changing how the world watches TV</strong></h3> <p>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.</p> <p>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.</p> <p>&nbsp;</p></div><h3><strong>What does the team work on?</strong></h3> <p>The Advertising Performance group focuses on outcomes for all participants in the advertising ecosystem: advertisers, publishers, and Roku. The systems and solutions span multiple disciplines and technologies to perform real-time multi-objective optimization with distributed systems at large scale and low latency. We use machine learning, reinforcement learning, AI, control systems, optimization systems, and auction dynamics to solve a broad set of complex problems. At the core of this is our machine learning, experimentation, and inference platform, which powers the ecosystem and is continuously evolved over time.</p> <h3><strong>What is the role?</strong></h3> <p>You’ll join the Auctions/Marketplace team building the systems that clear and price every ad impression across Roku’s advertising platform. This is a senior, hands-on engineering role with deep ownership over auction mechanics, optimization, and the real-time infrastructure that runs them at scale. You’ll work closely with the hiring manager and a small team of senior engineers on problems spanning auction theory, mechanism design, and large-scale distributed systems. Expect to move between whiteboard-level design and production code in the same week. The team is UK-based (Manchester-anchored) with close collaboration across Roku’s global ad engineering org.</p> <h3><strong>How will I use AI at Roku?</strong></h3> <p>At Roku, we don’t just use AI, we work with it. AI agents and smart tools help power drafts, analysis, and repetitive workflows, while our people bring direction, judgment, and accountability. We’re looking for curious, adaptable builders wh