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
