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Freestar

Senior Software Engineer – Javascript, Ad Tech Experience Required

Freestar

. Serve as a senior hands-on developer, writing and shipping production code daily .

Posted 10/6/2026full-timeRemote • United StatesSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates deep expertise in Prebid.js and Prebid Server, with a strong focus on wrapper architecture, bid adapters, and analytics modules. Proficient in JavaScript and TypeScript development, with experience in deploying high-throughput services on Google Cloud Platform.

Highest-signal resume keywords
Prebid.js ExpertisePrebid Server ConfigurationJavaScript DevelopmentGoogle Ad Manager KnowledgeGoogle Cloud Platform Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills
JavaScriptTypeScriptPrebid.jsPrebid ServerAsynchronous ProgrammingClient-Server ArchitectureOpenRTBAd Tech FluencyTechnical DocumentationProblem-Solving
Soft Skills
Communication SkillsCreativityTeam Collaboration
Tools & Technologies
Google Ad ManagerGPTIMA SDKGKECloud RunPub/SubBigQuery
Industry Keywords
Header BiddingAuction LifecycleIdentity SolutionsConsent FrameworksDynamic Allocation

Tech Stack

Tools & technologies
BigQueryCloudGoogle Cloud PlatformJavaScriptTypeScript

About the role

Key responsibilities & impact
  • Serve as a senior hands-on developer, writing and shipping production code daily
  • Review peers' pull requests and partner with other engineers to ensure codebase quality
  • Serve as a subject matter expert for Prebid.js and Prebid Server, including wrapper architecture, bid adapters, and identity, consent, floors, and analytics modules
  • Monitor Prebid.js and Prebid Server releases, OpenRTB specification changes, and emerging header bidding standards; translate them into platform recommendations and upgrades
  • Own the header bidding wrapper end to end, including architecture, release cycle, feature integration, and design decisions
  • Work with Google Ad Manager, GPT, and the IMA SDK, including line item architecture, key-value targeting, unified auction dynamics, and Unified Pricing Rules
  • Maintain high-quality JavaScript and TypeScript client-side scripts operating on thousands of publisher sites
  • Measure and protect Core Web Vitals, including INP, LCP, and CLS, plus memory usage, script execution time, and network overhead
  • Own deployed solutions, maintain reliability, and address critical issues to preserve system stability and performance
  • Report directly to the Engineering Manager and contribute autonomously to core projects

Requirements

What you’ll need
  • Deep, hands-on expertise with Prebid.js — wrapper configuration, bid adapters, modules (identity, consent, floors, analytics)
  • In depth knowledge of the auction lifecycle
  • Experience with Prebid Server — stored requests, server-side adapter configuration, s2s routing, and more
  • Strong working knowledge of Google Ad Manager, including GPT, line item architecture, key-value targeting, unified pricing rules, dynamic allocation, and more
  • 4+ years of experience in JavaScript development, with substantial TypeScript experience
  • Experience with Google Cloud Platform (e.g., GKE, Cloud Run, Pub/Sub, BigQuery) for deploying and operating high-throughput services
  • Broad ad tech fluency: OpenRTB, SSP/DSP integrations, identity solutions and EIDs, consent frameworks (TCF/GPP), Amazon TAM/APS, video (IMA SDK/VAST)
  • Strong experience with asynchronous programming and understanding of client-server architecture
  • Strong problem-solving skills and ability to work in a distributed team environment
  • Excellent technical documentation and communication skills
  • Ability to be creative and contribute based on your merit
  • Contributions to Prebid.js or Prebid Server open-source repositories would be advantageous
  • This role is not eligible for visa sponsorship