About The Position

At Dev.Pro , we work on projects that impact millions of people around the world — but we know it’s the people behind the tech who make it all happen. We truly value what makes each person unique and are building a workplace that’s inclusive, friendly, and supportive. About this opportunity We are building a high-performance advertising platform that integrates directly into publisher websites via a lightweight JavaScript and React-based widget. Our system renders dynamic local classified listings post-page load and is powered by a custom header bidding stack built on Prebid.js , fully deployed on Amazon Web Services . We are looking for a Senior JavaScript Engineer with strong AdTech experience (or adjacent high-performance frontend systems) to help scale and optimize our bidding infrastructure and on-page rendering engine.

Requirements

  • 5+ years of JavaScript engineering experience
  • Strong understanding of browser performance, async loading, and script execution
  • Experience with AdTech ecosystems (Prebid, GAM, DSPs, SSPs) OR strong adjacent experience (high-scale JS, real-time systems)
  • Familiarity with header bidding concepts (auctions, bid requests, latency tradeoffs)
  • Experience debugging third-party script conflicts and optimizing page performance
  • Ability to work in a fast-moving, product-driven environment

Nice To Haves

  • Direct experience with Prebid.js customization or bidder adapters
  • Exposure to analytics, tracking, and attribution systems

Responsibilities

  • Architect and optimize a custom Prebid.js-based header bidding stack
  • Build and maintain high-performance JavaScript integrations running on publisher websites
  • Improve latency, auction efficiency, and yield optimization across ad units
  • Develop and enhance React-based widgets that render dynamic local listings
  • Collaborate on bidder integrations, adapters, and demand partner connections
  • Debug complex issues across browser environments, third-party scripts, and ad exchanges

Benefits

  • 30 paid days off each year — use them for vacation, holidays, or personal time
  • 5 paid sick days, up to 60 days of medical leave, and 6 paid days off for family events like weddings, funerals, or having a baby
  • Partially covered health insurance - after probation
  • Wellness bonus for gym memberships, sports nutrition, and similar needs

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What This Job Offers

Job Type

Full-time

Career Level

Mid Level

Education Level

No Education Listed

Number of Employees

251-500 employees

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