Freestar is seeking a Senior Software Engineer specializing in Prebid and header bidding for a remote US-based role. The candidate will be a subject matter expert in Prebid.js and Prebid Server, responsible for developing and maintaining high-quality client-side monetization scripts at scale. Responsibilities include writing production code, reviewing peer code, owning the header bidding wrapper architecture and release cycle, integrating new features, and working with Google Ad Manager and IMA SDK. The role requires deep knowledge of programmatic advertising, auction lifecycle, and Google Ad Manager features. Candidates must have 4+ years of JavaScript experience, strong TypeScript skills, experience with Google Cloud Platform, and broad ad tech fluency including OpenRTB, SSP/DSP integrations, consent frameworks, and video ad technologies. Strong problem-solving, asynchronous programming skills, and ability to work in a distributed team are required. Contributions to Prebid open-source projects are a plus. This role is not eligible for visa sponsorship.
What you'll do
Write and ship production code daily, review peers' pull requests, and partner with other engineers to ensure quality across the codebase
Similar jobs
More roles worth a look
Related opportunities based on specialty and working model so candidates can keep momentum.
Serve as a subject matter expert for Prebid.js and Prebid Server, advising on wrapper architecture, bid adapters, and modules
Stay current on Prebid.js and Prebid Server releases, OpenRTB specification changes, and emerging header bidding standards, translating them into platform upgrades
Own the header bidding wrapper end to end, including architecture, release cycle, feature evaluation, and design decisions
Work daily with Google Ad Manager, GPT, and the IMA SDK, with deep knowledge of GAM features such as line item architecture, key-value targeting, unified auction dynamics, and Unified Pricing Rules
Maintain high quality standards for client-side monetization scripts running at massive scale
Measure and protect Core Web Vitals (INP, LCP, CLS), memory usage, script execution time, and network overhead to ensure monetization code does not degrade user experience or site performance
Take ownership of deployed solutions, ensuring ongoing reliability and addressing critical issues to maintain system stability and performance
