Remote opportunity at
FreestarSenior Software Engineer - Javascript- AD TECH EXPERIENCE REQUIRED (Remote- US only)
Freestar is an advertising technology company that engineers website monetization solutions for publishers, enabling them to maximize earnings and eliminate the administrative burden of ad operations.…
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About This Role
Freestar is an advertising technology company that engineers website monetization solutions for publishers, enabling them to maximize earnings and eliminate the administrative burden of ad operations. The company is seeking a Senior Software Engineer with expertise in JavaScript and the ad tech sector to join its remote team. In this role, the engineer will report directly to the Engineering Manager and act as a subject matter expert on header bidding…
Job Description
Freestar is an advertising technology company that engineers website monetization solutions for publishers, enabling them to maximize earnings and eliminate the administrative burden of ad operations. The company is seeking a Senior Software Engineer with expertise in JavaScript and the ad tech sector to join its remote team. In this role, the engineer will report directly to the Engineering Manager and act as a subject matter expert on header bidding and Prebid ecosystems.
This position involves writing production code daily, maintaining client-side scripts that operate at massive scale on thousands of publisher sites, and managing the entire header bidding wrapper architecture. The ideal candidate has significant background in programmatic advertising, understands the auction lifecycle, and can balance high-throughput monetization code with site performance and Core Web Vitals. Applicants must be comfortable working autonomously within a distributed team environment. Note that visa sponsorship is not available for this role.
Responsibilities
- Write and ship production code daily while reviewing pull requests from peers
- Serve as the subject matter expert for Prebid.js and Prebid Server
- Manage the header bidding wrapper end to end, including release cycles, architecture, and feature integration
- Work daily with Google Ad Manager, GPT, and the IMA SDK
- Monitor and protect Core Web Vitals, script execution time, memory usage, and network overhead
- Maintain deployed solutions and resolve critical issues to ensure system stability
Requirements
- At least 4 years of JavaScript development experience, including substantial TypeScript experience
- Deep, hands-on expertise with Prebid.js wrapper configuration, modules, and bid adapters
- Extensive knowledge of the auction lifecycle and client-side monetization
- Strong working knowledge of Google Ad Manager, line item architecture, and key-value targeting
- Experience with Prebid Server stored requests, s2s routing, and server-side adapter configuration
- Familiarity with Google Cloud Platform services such as GKE, Cloud Run, Pub/Sub, and BigQuery
- Broad ad tech fluency including OpenRTB, SSP and DSP integrations, identity solutions, and consent frameworks
- Understanding of asynchronous programming and client-server architecture
Qualifications
- Prior contributions to open-source Prebid.js or Prebid Server repositories
Core Skills
Frequently Asked Questions
Answers are based only on the employer’s listing; where it doesn’t say, neither do we.
Is this position remote?
Yes, the posting specifies that the role is located remotely and is open to candidates based in the US only.
Does Freestar provide visa sponsorship for this job?
No, the job posting explicitly states that this role is not eligible for visa sponsorship.
What level of experience is required for this role?
Candidates must have at least four years of JavaScript development experience with substantial TypeScript background, along with significant ad technology industry experience and deep expertise in Prebid and header bidding.
What is the salary for this position?
The salary is not stated in the job posting.
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