Performance Tester with Gatling (f/m/x)

Developing, maintaining, and deploying performance testing scripts, load generators, and executing performance tests
Defining performance testing scope, goals, and success criteria
Gathering and refining performance requirements with stakeholders
Analyzing performance results on both the client and server sides
Identifying bottlenecks using observability tools like Azure Application Insights, Amazon CloudWatch, and Grafana
Preparing clear reports with insights and recommendations
Supporting and guiding development teams on performance best practices while promoting a shift-left approach to performance testing
Helping define and improve performance engineering standards

Minimum 5 years of professional experience in software testing, including performance testing
Solid understanding of performance engineering concepts and optimization (architectural patterns, databases, microservices, queues, JVM tuning)
Solid understanding of performance testing methodologies, strategies, and workload profiles
Hands-on experience with Gatling (must-have) and programming skills in Java, including a good understanding of OOP principles and best practices (SOLID, DRY, YAGNI, KISS)
Previous work with cloud platforms such as Azure or AWS
Practical experience with containerization and orchestration tools, especially Docker
Familiarity with observability and monitoring tools such as Grafana, Kibana, InfluxDB, Prometheus, Azure Application Insights, and Amazon CloudWatch
Experience working with CI/CD pipelines (e.g., GitHub Actions, Azure DevOps) and version control systems such as Git
English proficiency at a minimum B2 level
Fluent Polish required
Residing in Poland required

Performance testing experience (JMeter, Python, Kubernetes), including mobile apps
Familiarity with GitHub Copilot

Great Place to Work since 2015 - it’s thanks to feedback from our workers that we get this special title and constantly implement new ideas
Employment stability - revenue of PLN 2.1BN, no debts, since 2006 on the market
We share the profit with Workers - over PLN 76M has already been allocated for this aim since 2022
Attractive benefits package - private healthcare, benefits cafeteria platform, car discounts and more
Comfortable workplace – class A offices or remote work
Dozens of fascinating projects for prestigious brands from all over the world – you can change them thanks to Job Changer application
PLN 1 000 000 per year for your ideas - with this amount, we support the passions and voluntary actions of our workers
Investment in your growth – meetups, webinars, training platform and technology blog – you choose
Fantastic atmosphere created by all Sii Power People

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