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Senior JavaScript Engineer(AdTech)

MGID

Full-time
Poland
javascript
engineer
advertising
typescript
Apply for this position

Are you passionate about modern frontend development and curious about the inner workings of digital advertising? We’re looking for a Senior JavaScript Engineer to join our dynamic team and take a key role in building and optimizing our in-house Header Bidding and ML-powered yield-management stack for publishers.

This is more than a traditional engineering role — we’re launching a new strategic direction in digital marketing, and we’re looking for someone who’s not only technically strong but also naturally investigative. You’ll lead data-driven experiments, explore new concepts, and help shape the next generation of AdTech solutions based on your findings. What you will do:

  • Set up a lightweight and efficient Prebid.js integration (under 30 KB) with support for 5 major ad bidders like Magnite and OpenX.

  • Build a high-performing sticky ad widget that refreshes smartly — only when the ad stays visible for at least 30 seconds and has 60%+ viewability.

  • Implement out-stream video ads (ads that play outside of a video player) using VideoJS and Google’s IMA SDK for seamless ad playback.

  • Configure and manage Google Ad Manager, including setting up line items, sending MCM (Multiple Customer Management) invites, and using automation scripts to streamline tasks.

  • Integrate a Consent Management Platform (CMP) to comply with privacy regulations, and develop a tool to validate ads.txt files, ensuring authorized ad inventory.

  • Create data views in BigQuery using SQL to analyze key monetization metrics like eCPM and Invalid Traffic (IVT), applying logic such as percentiles for deeper insights.

Who you are:

  • Senior-level experience with JavaScript/TypeScript (ES6+, Webpack or Vite, DOM performance)

  • Solid understanding of HTTP, browser DevTools, and CORS

  • Proven experience building production-ready widgets or SPAs

  • Strong analytical and problem-solving skills

  • English B2+: able to read technical documentation and write clear tickets

  • Quick learner, comfortable navigating complex systems

We're building smart solutions for a fast-moving industry — and we want curious, driven engineers like you on board. Apply today!

Apply for this position
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About the job

Full-time
Poland
12 Applicants
Posted 1 week ago
javascript
engineer
advertising
typescript

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Senior JavaScript Engineer(AdTech)

MGID

Are you passionate about modern frontend development and curious about the inner workings of digital advertising? We’re looking for a Senior JavaScript Engineer to join our dynamic team and take a key role in building and optimizing our in-house Header Bidding and ML-powered yield-management stack for publishers.

This is more than a traditional engineering role — we’re launching a new strategic direction in digital marketing, and we’re looking for someone who’s not only technically strong but also naturally investigative. You’ll lead data-driven experiments, explore new concepts, and help shape the next generation of AdTech solutions based on your findings. What you will do:

  • Set up a lightweight and efficient Prebid.js integration (under 30 KB) with support for 5 major ad bidders like Magnite and OpenX.

  • Build a high-performing sticky ad widget that refreshes smartly — only when the ad stays visible for at least 30 seconds and has 60%+ viewability.

  • Implement out-stream video ads (ads that play outside of a video player) using VideoJS and Google’s IMA SDK for seamless ad playback.

  • Configure and manage Google Ad Manager, including setting up line items, sending MCM (Multiple Customer Management) invites, and using automation scripts to streamline tasks.

  • Integrate a Consent Management Platform (CMP) to comply with privacy regulations, and develop a tool to validate ads.txt files, ensuring authorized ad inventory.

  • Create data views in BigQuery using SQL to analyze key monetization metrics like eCPM and Invalid Traffic (IVT), applying logic such as percentiles for deeper insights.

Who you are:

  • Senior-level experience with JavaScript/TypeScript (ES6+, Webpack or Vite, DOM performance)

  • Solid understanding of HTTP, browser DevTools, and CORS

  • Proven experience building production-ready widgets or SPAs

  • Strong analytical and problem-solving skills

  • English B2+: able to read technical documentation and write clear tickets

  • Quick learner, comfortable navigating complex systems

We're building smart solutions for a fast-moving industry — and we want curious, driven engineers like you on board. Apply today!

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