Software Engineer III (Python/JavaScript)

6 501 - 7 254 USDNet per month - B2B
4 743 - 5 301 USDGross per month - Permanent
Python

Software Engineer III (Python/JavaScript)

Python

al. 29 Listopada 20, Kraków

OpenX

Full-time
Permanent, B2B
Senior
Remote
6 501 - 7 254 USD
Net per month - B2B
4 743 - 5 301 USD
Gross per month - Permanent

Tech stack

    Polish

    C1

    English

    C1

    Python

    advanced

    fastapi

    advanced

    CI/CD

    advanced

    GCP/AWS

    regular

    Databases

    regular

    JavaScript

    nice to have

    TypeScript

    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.


Project:

You will have a chance to work in some aspects of agile application development, including our highly efficient and available serving platform, and your opinions will be considered in certain phases of product development, starting from requirements to validation and deployment. You will assist other engineers to ensure that our processes are defined, documented, tested, and easy to use.


The team is using the following technologies:

Frontend: JS/TS, React, Material UI

API: Python, Node.js

CICD: Cloudbuild, Spinnaker 


On a daily basis, we are using the Scrum framework with an open-minded attitude to adapt the process to our needs. Within the team, you will have the opportunity to work closely with a full-stack team of SWEs and SDETs focusing on different domains (both frontend and backend), as well as be a part of the API Guild focusing on making impactful changes to our tools and processes.



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 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, analyze existing solutions


Required Qualifications:

  • 4+ years of similar position working experience in Python

  • Experience with database system design, RDBMs (MySQL, Postgres), or NoSQL

  • Experience with JavaScript - nice to have

  • Experience with one of the Cloud - GCP or AWS - nice to have

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

  • Experience in REST API or GraphQL

Published: 17.09.2025
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Software Engineer III (Python/JavaScript)

6 501 - 7 254 USDNet per month - B2B
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Software Engineer III (Python/JavaScript)

al. 29 Listopada 20, Kraków

OpenX

6 501 - 7 254 USDNet per month - B2B
4 743 - 5 301 USDGross per month - Permanent
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