Openx
Openx14d ago

Software Development Engineer in Test II

Kraków,KrakowRemoteFull-Timemid
OtherSoftware Development Engineer In Test
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Quick Summary

Overview

Company at a Glance OpenX is focused on unleashing the full economic potential of digital media companies.

Technical Tools
OtherSoftware Development Engineer In Test
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.

At OpenX Poland, we’re looking for talented and curious engineers to join our amazing team in Cracow, Poland. Currently, we’re looking for a Software development Engineer II - Test who will join our Full-stack team.

The team is using the following technologies:
Frontend: JS/TS, React, Material UI
API: Python
Backend: Java, Go, Erlang, Elixir
CICD: Cloudbuild, Spinnaker 

On 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 other SDETs focusing on different domains (both frontend and backend), as well as be a part of the QA Guild focusing on making impactful changes to our tools and processes.

We are operating at a scale:
100% Cloud-based (GCP) platform
Over 380 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
  • Employment contract (14 237 - 15 913 PLN gross/monthly) OR B2B (119 - 133 PLN net/hourly)
  • Working with the newest technologies such as Cloud Computing (GCP)
  • Challenges at work that are difficult to find anywhere else!
  • Solving important problems in a scale
  • Joining a company that is growing and scaling
  • Flexible working hours & remote work option
  • Test large-scale data processing systems
  • Involved in all phases of product development, starting from requirements to validation and deployment
  • Analyze and improve efficiency, scalability, and stability of applications
  • Work in a focused and nimble team that collaborates on common problems across products and across focus areas
  • Own components, processes, and workflows that demand professionalism, excellent communication, teamwork, and documentation skills
  • Create, maintain, and improve automation test suites/frameworks
  • Monitor and maintain QA CI pipelines, collaborate on CD enablement
  • Conduct root cause analysis of issues and provide solutions for better coverage and maintainability
  • Effectively communicate and being a crucial member of both the project teams and QA organization
  • Be exposed to a broader set of problems, which allows for fast career growth and proximity to abundant technical problems
  • 2+ years of test automation experience
  • Proficiency in Python and ability to improve, debug, modify, and maintain an automation framework codebase
  • Openness to work with other languages like Java, JavaScript
  • Experience in using test design techniques
  • Experience using CI/CD tools like Jenkins or Spinnaker
  • Excellent troubleshooting skills to triage complex issues
  • Experience operating in an agile environment
  • Communicative Polish and English languages 
  • Experience Google Cloud Platform, k8s, and Docker (nice to have)
  • Annual performance bonus
  • Tax-deductible system due to copyright protection: 75%
  • Private health care for you and your family (covered by OpenX)
  • Private life and travel insurance
  • MultiKafeteria program 
  • Training: access to the LinkedIn learning platform and Tech workshops 
  • Holiday Allowance
  • Pension scheme (PPK from PZU)
  • Additional paid day off 
  • Free parking lot 
  • Access to peer to peer recognition platform
  • Monthly work-from-home allowance and one-time payment when you join us to help you set up your home office
  • We celebrate team members' important personal milestones (vouchers, gifts)
  • Location & Eligibility

    Where is the job
    Worldwide
    Fully remote, anywhere in the world
    Who can apply
    Same as job location
    Listed under
    Worldwide

    Listing Details

    Posted
    April 16, 2026
    First seen
    April 16, 2026
    Last seen
    April 30, 2026

    Posting Health

    Days active
    14
    Repost count
    0
    Trust Level
    44%
    Scored at
    April 30, 2026

    Signal breakdown

    freshnesssource trustcontent trustemployer trust
    Openx
    Openx
    lever

    OpenX is an independent omni-channel supply-side platform (SSP) and a global leader in supply-side curation, transparency, and sustainability, powering advertising across CTV, app, mobile web, and desktop.

    Employees
    350
    Founded
    2007
    Domain
    openx.com
    View company profile
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    OpenxSoftware Development Engineer in Test II