Senior Test Performance Engineer - QA (UI & API)

Expect more. Connect more. Be more at Diebold Nixdorf.  Our teams automate, digitize, and transform the way more than 75 million people around the globe bank and shop in this hyper-connected, consumer-centric world. Join us in connecting people to commerce in this vital, rewarding role.

Position Overview:

We are seeking a skilled developer with expertise in UI and API performance testing to ensure our applications deliver optimal speed, scalability, and reliability. This role involves designing, implementing, and executing performance tests, analyzing results, and collaborating with development teams to optimize application performance across both front-end and back-end components

Location: Hybrid model is possible (minimum 3 days in Katowice office per week).

• Non-Functional Testing: Contribute to performance (e.g., smoke/load scripts).
• Test Development & Execution: Develop automated performance test scripts, simulate real-world usage scenarios for UI and API endpoints under varying loads.
• Monitoring & Analysis: Collect and analyze performance metrics and identify bottlenecks for front-end and API.
• CI/CD Integration: Integrate test suites into pipelines.
• Test Data & Environments: Support deterministic test data strategies and ensure environment readiness and observability.
• Quality Analytics: Support tracking quality KPIs (coverage by critical path, defect escape rate) and drive continuous improvements.
• Code Quality: Review automation code, enforce standards, and mentor engineers on testability, patterns, and best practices. 
• Defect Management: Triage failures, perform root cause analysis, and collaborate to prevent recurrence via guardrails and automation. 
• Documentation: Maintain living documentation for test strategy, frameworks, environments, and runbooks.
• Experimenting with AI Technologies in Test Automation: Implementing AI-based solutions for test generation, coverage analysis, anomaly detection, and regression optimization.

Must have:

• Self-driven person with the ability to design and implement performance test scenarios and turn them into automated load and stress tests
• Minimum 3 years experience in test automation or software engineering with a strong automation focus
• Knowledge of a modern programming language (C#)
• Hands-on experience with:
  • Docker, Jenkins, Git, JIRA/X-Ray
  • JMeter or comparable Performance Testing Tool
  • Selenium/Selenoid or comparable Test Automation Framework (eg. Playwright)
  • Windows and Linux Operating Systems (admin tools e.g. Microsoft Visual Studio, SQL Management Studio, installation scripts etc)
• Detailed understanding of software testing principles and Agile development process
• Ability to writing technical documentation
• Good English communication skills (speaking and writing) and ability to work in international teams

Nice to have:

• Experience in using AI in the testing process, e.g. Github CoPilot (including concept of MCP’s). 
• Elastic stack
• RabbitMQ
• Experience with integrating HW simulation with E2E testing

We offer:

• Contract of employment
• Cafeteria Program
• Over 8000 industry recognized trainings
• Various options of development
• Being part of a multicultural team
• Possibility to use foreign languages on a daily basis
• Teamworking and supportive atmosphere in our teams
• Life insurance,
• Private medical care,
• Sport card,
• 26 days of holiday regardless seniority,
• Employee referral programme.

Pay Transparency Statement
The monthly base salary range for this position starts from 10,900.00 PLN gross 
Actual compensation will depend on factors such as qualifications, skills, competencies, geographic location, and relevant experience. Certain roles may include additional components beyond base salary, such as incentive opportunities or other forms of variable compensation. Details of any such components will be discussed during the interview process and will be governed by the applicable plan documents.

#LI-PM1 #LI-Hybrid

Why should you join Diebold Nixdorf?

Brightest minds + technology and innovation + business transformation  The people of Diebold Nixdorf are 23,000+ teammates of diverse talents and expertise in more than 130 countries, harnessing future technologies to deliver personalized, secure consumer experiences that connect people to commerce. Our culture is fueled by our values of collaboration, decisiveness, urgency, willingness to change, and accountability.

–Diebold Nixdorf is an equal opportunity employer and we value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, gender identity, age, marital status, veteran status, or disability status.

** To all recruitment agencies: Diebold Nixdorf does not accept agency resumes. Please do not forward resumes to our jobs alias, Diebold Nixdorf employees or any other organization location. Diebold Nixdorf is not responsible for any fees related to unsolicited resumes**

We are a global Company operating in multiple Locations and Entities. As we are keen to find the best solution for our candidates several legal entities might be applicable for a Job offer. A List of our operating entities can be found here - https://www.dieboldnixdorf.com/en-us/about-us/global-locations