Senior Software Engineer - Javascript- AD TECH EXPERIENCE REQUIRED
Freestar · Posted Nov 11, 2026
- Remote, United States
- Remote
- Full-time · Senior
- 4+ years
As a Senior Software Engineer at Freestar, you will be a subject-matter expert on Prebid and the header bidding ecosystem, instrumental in developing high-quality solutions that handle massive amounts of monetization opportunities for some of the world’s largest websites.
Responsibilities
- Serve as a senior hands-on developer, writing and shipping production code daily, reviewing peers' pull requests, and partnering with other engineers to ensure quality across the entire codebase.
- Serve as a subject matter expert for Prebid.js and Prebid Server.
- Stay current on Prebid.js and Prebid Server releases, OpenRTB specification changes, and emerging standards in the header bidding ecosystem, translating those developments into concrete recommendations and upgrades for our platform.
- Own header bidding wrapper end to end, including architecture opinion, release cycle, and key design decisions.
- Work daily with Google Ad Manager, GPT, and the IMA SDK.
Requirements
- Nice to have: Contributions to Prebid.js or Prebid Server open-source repositories