[Hiring] Senior JavaScript / Prebid Engineer @Dev.Pro

Role Description

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.

Key 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

Qualifications

• 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 Have

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

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

Next Steps

• Submit a CV in English
• Intro call with a Recruiter
• Internal interview
• Client interview
• Offer