Staff Software Engineer

9 486 - 10 686 USDNet per month - B2B
7 352 - 8 217 USDGross per month - Permanent
JavaScript

Staff Software Engineer

JavaScript

al. 29 Listopada 20, Kraków

OpenX

Full-time
Permanent, B2B
Senior
Remote
9 486 - 10 686 USD
Net per month - B2B
7 352 - 8 217 USD
Gross per month - Permanent

Tech stack

    Polish

    C1

    English

    C1

    JavaScript

    master

    TypeScript

    master

    Databases

    master

    GCP/AWS

    advanced

    Python

    nice to have

Job description

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.

You will be part of the API Foundation team. Our exchange handles billions of ad requests daily connecting thousands of publishers with demand partners. It’s fully containerized running in the cloud in multiple regions across the world. Ads from our systems can be seen in your favored mobile game, web page, maybe TV in the future. That’s the place where each millisecond matters


We are operating at a scale:

100% Cloud-based (GCP) platform

Over 370 billion Ad requests every day

Over 120 000 CPU daily

Over 140 TB RAM daily

Over 50 PB of data per week

Over 1200 production deployments a month



Key responsibilities:

  • Design high-performance, distributed, low-latency systems

  • Architect, create, and deliver new features and functionality

  • Work with Product to drive the requirements, and own the project end-to-end

  • Work with Product and UX teams to bring consumer-grade user experience and design to the

  • enterprise

  • Work with Engineering and Product teams distributed across multiple locations

  • Analyze and improve efficiency, scalability, and stability of servers and processes

  • Think long-term and be unsatisfied with band-aids

  • Identify unnecessary complexity and remove it


Required Qualifications:

  • 7+ years experience with building SaaS applications using JavaScript/Typescript (including Node.js)

  • Experience with databases system design, RDBMs, or NoSQL

  • Experience with Python - nice to have

  • Experience with Amazon Web Services or Google Cloud Platform

  • Experience working in digital media, marketing technology, or advertising technology is a big plus

  • Communicative Polish and English

Published: 17.09.2025
Office location

Staff Software Engineer

9 486 - 10 686 USDNet per month - B2B
Apply

Staff Software Engineer

al. 29 Listopada 20, Kraków

OpenX

9 486 - 10 686 USDNet per month - B2B
7 352 - 8 217 USDGross per month - Permanent
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