Senior Software Engineer, Ad Auctions

Salary: £60,000 - 100,000 per year

Requirements

• Senior-level experience in software engineering, ideally with direct exposure to ad tech, auctions, or marketplace systems
• Working knowledge of auction theory, mechanism design, or pricing/ranking optimization
• Strong grounding in probability and statistics as applied to real-world systems
• Comfort designing and reasoning about distributed systems at scale
• Demonstrated AI/agentic-tooling fluency, including experience with coding harnesses like Claude Code or Cursor, MCP servers, custom skills, or agent frameworks
• Clear communicator who can explain reasoning and trade-offs, not just conclusions

Responsibilities

• Design and build components of our real-time ad auction and marketplace systems
• Apply auction theory and mechanism design to pricing, ranking, and clearing problems
• Own optimization work end-to-end, from framing the problem through production rollout
• Partner with the hiring manager and senior engineers on system design for scale, reliability, and latency
• Use probability, statistics, and experimentation to validate changes before and after launch
• Communicate technical trade-offs clearly to engineering and cross-functional partners

Technologies

• AI
• Claude Code
• Cursor
• Support
• Machine Learning
• MCP
• Roku
• AI Agents
• LESS

More

We are Roku, the #1 TV streaming platform in the U.S., Canada, and Mexico, and our mission is to power every television in the world by connecting consumers, content publishers, and advertisers. Our Advertising Performance group focuses on outcomes across the advertising ecosystem, using machine learning, reinforcement learning, AI, control systems, optimization systems, and auction dynamics to solve complex problems at scale. You will join our Auctions/Marketplace team, a senior, hands-on engineering group building the systems that clear and price every ad impression across our advertising platform. The team is UK-based, anchored in Manchester, and collaborates closely with our global ad engineering organization. We offer a fast-paced, collaborative environment, hybrid working with office attendance generally Monday through Thursday and flexible remote work on Fridays, and a comprehensive benefits package that may include healthcare, life, accident, disability, commuter, retirement options, mental health and financial wellness support, and time off in line with local policies.

last updated 35 week of 2026