Senior Software Engineer - Javascript

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer - Javascript based in the United States.

This role offers the opportunity to build high-performance JavaScript solutions that power large-scale digital monetization systems. You will work on complex engineering challenges within the programmatic advertising ecosystem, helping optimize revenue opportunities for major publishers. As a senior technical contributor, you will influence architecture decisions, improve platform reliability, and deliver production-level code at scale. The position requires deep expertise in client-side development, auction technologies, and modern ad infrastructure. You will collaborate with experienced engineers while operating with a high degree of autonomy and ownership. This is an ideal opportunity for a problem solver passionate about JavaScript, TypeScript, performance optimization, and innovative technology solutions.

Accountabilities:: The Senior Software Engineer will serve as a technical expert responsible for designing, developing, and maintaining scalable monetization solutions. This role combines hands-on engineering, technical leadership, and ownership of critical systems that support high-volume digital experiences.

Design, develop, test, and deploy high-quality production code using JavaScript and TypeScript.

Act as a subject matter expert on Prebid.js, Prebid Server, and the broader header bidding ecosystem.

Own the architecture, evolution, and release processes of header bidding solutions, making key technical decisions.

Maintain and improve client-side scripts running across thousands of publisher websites while ensuring reliability and scalability.

Optimize application performance by monitoring Core Web Vitals, memory usage, execution time, and network efficiency.

Evaluate emerging standards, technology updates, and ecosystem changes to recommend platform improvements.

Work extensively with advertising technologies, including Google Ad Manager, GPT, IMA SDK, and programmatic auction systems.

Collaborate with engineering teams through code reviews, technical discussions, and shared best practices.

Troubleshoot production issues, improve system stability, and ensure deployed solutions continue delivering strong performance.

Contribute technical documentation and communicate complex concepts clearly across teams.

Requirements:

The ideal candidate is an experienced software engineer with strong JavaScript expertise and a deep understanding of digital advertising technologies. They should be comfortable solving complex technical challenges, working independently, and contributing within a distributed engineering environment.

4+ years of professional experience developing applications with JavaScript, including significant TypeScript experience.

Strong hands-on experience with Prebid.js, including wrapper configuration, bid adapters, modules, identity solutions, consent, floors, and analytics.

Deep understanding of programmatic advertising workflows and the complete auction lifecycle.

Experience with Prebid Server, including stored requests, server-side adapter configuration, and server-to-server routing.

Strong knowledge of Google Ad Manager, including GPT, line item architecture, key-value targeting, unified pricing rules, and dynamic allocation.

Experience with Google Cloud Platform services such as GKE, Cloud Run, Pub/Sub, and BigQuery for high-throughput applications.

Broad understanding of ad technology concepts, including OpenRTB, SSP/DSP integrations, identity frameworks, consent frameworks, Amazon TAM/APS, and video advertising technologies.

Strong understanding of asynchronous programming and client-server architecture.

Excellent problem-solving skills with the ability to work effectively in a remote and distributed environment.

Strong communication skills with the ability to document technical solutions and collaborate with engineering teams.

Ability to take ownership, make independent decisions, and contribute creative technical ideas.

Experience contributing to Prebid.js or Prebid Server open-source projects is a plus.

Benefits:

Full-time salaried position.

Fully remote opportunity available within the United States.

Flexible vacation policy to support work-life balance.

Opportunity to contribute to large-scale technology solutions impacting global digital platforms.

Collaborative environment focused on innovation, ownership, and technical excellence.

Competitive compensation package based on experience and qualifications.

How Jobgether works: We use an AI-powered matching process to ensure your application is reviewed quickly, objectively, and fairly against the role's core requirements. Our system identifies the top-fitting candidates, and this shortlist is then shared directly with the hiring company. The final decision and next steps (interviews, assessments) are managed by their internal team. We appreciate your interest and wish you the best!  Why Apply Through Jobgether?    Data Privacy Notice: By submitting your application, you acknowledge that Jobgether will process your personal data to evaluate your candidacy and share relevant information with the hiring employer. This processing is based on legitimate interest and pre-contractual measures under applicable data protection laws (including GDPR). You may exercise your rights (access, rectification, erasure, objection) at any time.     #LI-CL1