Full-Stack Software Engineer

Kraków, Małopolskie, Poland
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OpenX, a leading provider of digital and mobile advertising technology, seeks a Full-Stack Developer. You will be part of an engineering team that will have the opportunity to engage with the business and technical resources of our partners (both Publishers and Demand-side) to help optimize their ad-tech stack. You will work with a cross-functional team of solution engineers and business partners to execute the projects.


Key responsibilities:

  • Optimize current implementations by:
    • Work with solution engineers to diagnose integration issues
    • Generate a concrete list of implementation changes to be shared with the solutions engineering team and BD/RMs
    • Launch and monitor changes, proving value (or diagnosing new problems)
  • Build tools and a partner self-service portal to accelerate the diagnose/fix/measure cycle
  • Build a system to monitor features of partners (e.g. crawler) and suggest changes for all partners.
  • Deliver top-level results & suggestions, and work on implementation with partner
  • Develop or enhance existing tools related to performance monitoring, tag management and other internal tools.


Required Qualifications:

  • 5+ years of experience with building web applications using JavaScript/TypeScript (including Node.js)
  • Experience with web/browser performance optimization
  • Deep understanding of how browsers work and what’s happening behind the scenes when a page loads
  • Experience with at least one framework is a plus: React, Angular or Vue.js
  • Experience with REST APIs
  • Fluent written and spoken English skills


Desired Qualifications

  • Experience with mobile application development (iOS or Android)
  • Experience with Google Cloud Platform or Amazon Web Services
  • Experience working in digital media, marketing technology or advertising
  • Experience with GraphQL


What we offer:

  • Free Catered Lunches every Monday, Wednesday and Friday
  • Extra days off
  • Travel allowance
  • Private medical healthcare for you and your relatives
  • Life insurance
  • MultiSport Card
  • Standing desks - all desks at our office are adjustable
  • Snacks & Drinks (healthy options available)
  • SocialX Club
  • Great opportunities to work with your local team as well as with the teams in the US
  • New modern office close to the City Center


Company at a Glance

OpenX is focused on unleashing the full economic potential of digital media companies. We do this by making digital advertising markets and technologies that are designed to deliver optimal value to publishers and advertisers on every ad served across all screens.

At OpenX, we have built a team that is uniquely experienced in designing and operating high-scale ad marketplaces, and we are constantly on the lookout for thoughtful, creative executors who are as fascinated as we are about finding new ways to apply a blend of market design, technical innovation, operational excellence, and empathetic partner service to the frontiers of digital advertising.

OpenX Values

Our five company values form a solid bedrock serving to define us as a group and guide the company. Our values remind us that how we do things often matters as much as what we do.

We are one

One team. No exceptions. We are a group of strong and diverse individuals unified by a clear common purpose.

Our customers define us

We know our business flourishes or dies because of our customers.

OpenX is mine

We are all owners of OpenX. We stake our personal and professional reputations on the excellence of our work.

We are an open book

We are eager to teach and share what we know with others.

We evolve fast

We take risks and confront failure openly. We recognise and repeat success aggressively. We actively seek out and provide constructive criticism. Defensiveness is for weaklings!