Senior Software Engineer – JavaScript, Ad Tech Experience Required

Freestar

. Write and ship production code daily .

Posted 11/11/2026full-timeRemote • United StatesSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates deep expertise in Prebid.js and Prebid Server, with a strong focus on JavaScript and TypeScript development for website monetization solutions. Capable of managing header-bidding architecture and ensuring code quality while collaborating effectively in a distributed team environment.

Highest-signal resume keywords

Prebid.js ExpertiseJavaScript DevelopmentGoogle Ad Manager KnowledgePrebid Server ExperienceGoogle Cloud Platform Proficiency

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

JavaScriptTypeScriptPrebid.jsPrebid ServerAsynchronous ProgrammingClient-Server ArchitectureOpenRTBSSP/DSP IntegrationsBid AdaptersAuction Lifecycle

Soft Skills

Problem-SolvingCommunicationCreativity

Tools & Technologies

Google Ad ManagerGPTIMA SDKGoogle Cloud PlatformGKECloud RunPub/SubBigQuery

Industry Keywords

Header-BiddingConsent FrameworksIdentity SolutionsDynamic AllocationCore Web Vitals

Tech Stack

Tools & technologies

BigQueryCloudGoogle Cloud PlatformJavaScriptTypeScript

About the role

Key responsibilities & impact

Write and ship production code daily
Review peers' pull requests and partner with engineers to ensure codebase quality
Serve as subject-matter expert for Prebid.js and Prebid Server
Advise on wrapper architecture, bid adapters, identity, consent, floors, and analytics modules
Monitor Prebid.js and Prebid Server releases, OpenRTB specification changes, and emerging header-bidding standards
Translate ecosystem developments 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 IMA SDK
Maintain high-quality JavaScript and TypeScript client-side scripts at massive publisher-site scale
Measure and protect Core Web Vitals, memory usage, script execution time, and network overhead
Own deployed solutions, maintain reliability, and address critical issues
Report directly to the Engineering Manager
Develop solutions for website monetization for publishers

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, including GKE, Cloud Run, Pub/Sub, and 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 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 merit
Visa sponsorship is not available
Contributions to Prebid.js or Prebid Server open-source repositories are preferred