🔹 We are looking for a Senior Performance Tester for a short-term contract 🔹

Location: Poland – remote

Type of agreement: B2B contract, temporary assignment (4–5 months); no confirmed extension at this stage

Start date: ASAP

End client: Polish public sector organization in the education field

Responsibilities:

• Define the performance testing strategy — objectives, workload models, test scenarios, entry/exit criteria and acceptance thresholds
• Set up and maintain the performance testing framework for web applications, web services and supporting Windows Services
• Create and execute performance test scripts, analyzing and comparing them against real browser/application traffic (connection handling, session management)
• Design realistic workload models and recommend innovative performance testing approaches
• Run tests on the PROD environment within agreed maintenance windows, and analyze the results
• Design, configure and troubleshoot distributed load-generation environments across on-premises machines and Azure virtual machines, considering capacity, connectivity and security
• Manage test data and test environments, working with infrastructure teams to prepare and validate PREPROD/PROD environments hosted in external data centers
• Analyze application, database and infrastructure performance metrics, identify bottlenecks and prepare actionable recommendations

Requirements & Preferred experience

• Fluent Polish
• Experience in requirement analysis, test case design and test execution
• At least 6 years of hands-on performance testing experience
• Strong hands-on experience with Apache JMeter — maintaining, extending and executing performance test scripts
• Experience testing monolithic web applications built on .NET and Microsoft SQL Server, including Windows Services
• Practical knowledge of:
•   Microsoft SQL Server and SQL scripting
•   Windows and Windows Services
•   Infrastructure monitoring tools (Azure Portal, Grafana, Dynatrace or equivalent)
•   Shell commands (cmd, bash or PowerShell)
•   API testing tools (Postman, SoapUI or equivalent)
•   Web browser dev tools for performance analysis
•   Defect management tools (Azure DevOps, Jira)
• Knowledge of Playwright or another UI-level performance testing tool is a strong plus

We offer:

• B2B agreement
• Transparent working conditions with both Ework and the client
• Current support during our cooperation
• Possibility to work in an international environment
• Collaborative environment in Swedish organizational culture

Contact person: nicola.urbanska@eworkgroup.com

Client code: MS03

Do you know someone who would fit this position? Recommend a candidate by sending her/his CV to: polecenia@eworkgroup.com

Whistleblowing Policy, which provides guidelines for reporting misconduct can be found on Ework website: https://www.eworkgroup.com/about-us/our-responsibility