May 3, 2026
Non-Functional Tester
Senior • Remote
29,400 - 32,760 PLN
About the project
We are looking for an experienced Non Functional Tester to join a team working on the expansion and development of a modern payment transaction processing platform. The solution is based on a microservices architecture, and the project offers the opportunity to work with advanced technologies while influencing the system architecture and the overall product development.
Location: 100 % remote
Responsibilities
Define, own, and continuously improve end‑to‑end non‑functional testing strategies, covering areas such as performance, scalability, reliability, and resilience.
Design, develop, and maintain automated test scenarios, scripts, and traffic simulations reflecting real‑world usage patterns.
Execute non‑functional test suites and ensure test environments are correctly prepared, stable, and representative of production.
Analyse and interpret test results, identify bottlenecks, risks, and improvement areas, and translate findings into clear action items.
Prepare clear and structured reports, presenting metrics, conclusions, and practical recommendations to technical and non‑technical stakeholders.
Work in close cooperation with development teams, DevOps engineers, and architects to align performance expectations, technical constraints, and quality goals across the delivery lifecycle.
Requirements
Must have
7+ years of professional experience in software testing, quality engineering, or related technical roles, with a strong focus on non‑functional testing.
Ability to write production‑quality code using an object‑oriented language, ideally Java or another JVM‑based technology.
Solid hands‑on experience with containerized and cloud‑native environments, including platforms such as Kubernetes and OpenShift.
Proven expertise in defining, owning, and executing non‑functional testing strategies, including planning, coordination, and reporting.
Strong background in automated testing, particularly in the areas of performance, resilience, and stability.
Demonstrated experience delivering non‑functional test types such as load, stress, endurance, soak, resilience, and chaos testing.
Good understanding of software architecture, distributed systems, and modern infrastructure components.
Practical experience with at least one performance or test automation framework, e.g. JMeter, Gatling, or Spock.
Comfortable working with version control systems, preferably Git.
Experience executing non‑HTTP or non‑API performance tests, such as file‑based or protocol‑level testing.
Hands‑on knowledge of monitoring and observability solutions, including Grafana and Prometheus.
Ability to design and build custom testing tools or utilities when standard solutions are insufficient.
Fluent spoken and written English.
Nice to have
Previous hands‑on experience working as a Software Developer or DevOps Engineer.
Experience with scripting languages such as Groovy or Linux shell.
Knowledge of CI/CD pipelines and build tooling, including Jenkins and Maven, as well as configuration and deployment tools like Kustomize or Helm.
Experience testing microservice‑based and distributed architectures.
Exposure to complex enterprise environments involving technologies such as container platforms, relational and NoSQL databases, messaging systems, in‑memory data grids, or hardware security modules.
Ability to analyze and troubleshoot JVM memory issues, including heap dumps, profiling, and performance tuning recommendations.
Understanding of database performance concepts, including execution plans and query optimization techniques.
Knowledge of networking fundamentals and communication protocols, such as SSL/TLS, HTTPS, TCP/IP, and gRPC.
We offer
Ongoing support from a dedicated agent, taking care of your project continuity, client contact, necessary formalities, work comfort and development,
Consultant Development Program – advice on growth planning based on the latest trends and market needs in IT, including consultations with agents and growth mentors,
Access to 7N Learning & Development – a development and educational platform with webinars, a library of articles and industry reports, and regular invitations to one-time and recurring development events – technical, business, and lifestyle,
Spectacular integration events, both for you (e.g., annual Kick-Off trip, Christmas parties, or Summer Olympics sports events) and for your loved ones (e.g., family picnics, movie premieres),
Professional development not only during the project – you can get involved in knowledge transfer to others within the 7N Services offering directed at 7N clients,
Relationships and access to the knowledge of the most experienced IT experts in the market – the average professional tenure of our consultants in Poland is over 10 years,
A complete benefits package, including funding for medical care, life insurance, sports cards for you and your loved ones, as well as discounts in stores in Poland and abroad.
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