About this role

Performance Test Engineer Mindbox Sp. z o.o. Daily tasks: - Own and maintain the Performance & Non-Functional Testing strategy for the programme. - Define and execute comprehensive test strategies covering load, stress, failover, HA, and disaster recovery testing scenarios. - Collaborate closely with Scrum teams, Architects, DevOps, and support engineers to embed performance requirements in delivery pipelines. - Select appropriate tooling (e.g., JMeter, Gatling, LoadRunner, NeoLoad) and define long-term strategy for environments and resources.

- Oversee test execution, monitoring, and reporting; provide dashboards, KPIs, and clear risk-based assessments. - Analyse application performance using profilers, logs, and system metrics; identify bottlenecks and drive remediation plans. - Ensure integration of test results into CI/CD pipelines and reporting frameworks. - Lead and mentor Performance Testing engineers, fostering a quality-first culture. - Produce clear documentation and reports for stakeholders, demonstrating system readiness and compliance.

Musts: Testing, HA, JMeter Proven expertise in Performance & Non-Functional Testing for enterprise-level systems, including load, stress, failover, HA, disaster recovery testing. Strong hands-on experience with performance test tools (JMeter, Gatling, LoadRunner, NeoLoad or similar). Practical knowledge of cloud-based environments (Google Cloud Platform highly desirable). Experience defining end-to-end testing strategies , selecting tooling, and driving governance across large programmes.

Strong scripting/coding skills (Python, Java, Scala) and ability to test APIs, containers, serverless, message queues, and GDBMS platforms. Familiarity with CI/CD, observability tooling (e.g., AppDynamics, Datadog), and Infrastructure-as-Code concepts. Excellent leadership, stakeholder management, and communication skills. Experience delivering solutions in both Agile and Waterfall delivery models. Nice to Have Exposure to Identity & Access Management (IAM) platforms.

Experience with GCP, Kubernetes, SaaS performance testing , and DevSecOps approaches. Familiarity with GitOps, policy-as-code, and advanced monitoring solutions. Joining this project you’ll become part of Mindbox – a tech-driven company where consulting, engineering, and talent meet to build meaningful digital solutions. We’ll back you up every step of the way, accelerate your development, and ensure your skills make a difference.

At Mindbox we connect top IT talents with technology projects for leading enterprises across Europe. Lead the Future of Performance & Non-Functional Testing! Are you ready to take ownership of performance and resilience testing in a world-class technology transformation programme? Join our client’s team as a Performance Test Engineer and play a key role in delivering scalable, reliable, and secure global solutions. Sounds like your kind of challenge? What you get in return Flexible cooperation model – choose the form that suits you best (B2B, employment contract, etc.) Hybrid work setup – 6x/month from the office in Kraków Collaborative team culture – work alongside experienced professionals eager to share knowledge Continuous development – access to training platforms and growth opportunities Comprehensive benefits – including Interpolska Health Care, Multisport card, Warta Insurance, and more High quality equipment – laptop and essential software provided

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