Non-Functional Testing Expert (Performance / Reliability)

Warszawa, Poland Posted on April 28, 2026

Job Description

About the project

You will join a project delivered within a large financial organization, focused on ensuring high-quality payment systems in terms of performance, reliability, and resilience. You will have a real impact on the stability of systems operating in a production environment.

Responsibilities

Creating non-functional testing strategies and test plans based on risk analysis

Designing and executing performance, reliability, and resilience tests

Analyzing test results and identifying performance issues

Collaborating with technology teams to resolve issues

Reviewing and optimizing test cases and test scripts

Prioritizing and coordinating the defect resolution process

Integrating non-functional testing into CI/CD pipelines

Preparing reports and presenting results to stakeholders

Collaborating with distributed teams and external vendors

Participating in projects delivered in the SAFe methodology

Requirements

Minimum 7 years of experience in software testing

Minimum 5 years of experience in non-functional testing (performance, reliability)

Hands-on experience with performance testing tools (e.g., LoadRunner, JMeter, Gatling)

Experience working with CI/CD tools (Jenkins, Maven, Git, Subversion)

Ability to work with SQL and analyze reports (e.g., AWR)

Experience with Jira (QTest is a plus)

Knowledge of technologies: XML, SOAP, JSON

Nice to have: experience with Linux/Unix, cloud environments, and mainframe systems

Very good command of English

Nice to have

Experience in the banking sector or payment systems

Development experience

Experience in defining and implementing testing processes

Soft skills

Ability to work in a complex, multi-team environment

Proactivity and independence

Strong communication skills

Ability to plan work and prioritize tasks

Problem-solving mindset and continuous improvement approach

What we offer

Participation in a large-scale, technologically advanced project

Work in an environment based on SAFe and CI/CD

Real impact on the quality of critical systems

Work in an international and distributed team

High level of autonomy and influence on decision-making

About B2Bnetwork

We manage the testing prosess at every stage from planning to the end of the project B2Bnetwork provides tests outsourcing services. Our experience, qualified IT team members and modern equipment allow us to provide the best QA services for our clients. We are confident that our clients will be satisfied with the outcome of our work, due to the high quality of services we offer. B2Bnetwork provides a personalized approach to every client, thus effectively meeting all the clients’ expectations. Cooperation with major Clients: - Quality Assurance and Tests - Audits and optimization of QA processes - Tests of major Core Banking systems - Body Leasing, Team Leasing - Fixed-Price projects - Audits of Banking Application Code We have expertise and strong experience in testing IT software systems - We have the experience and expertise at all the levels of software testing - We have experience in using many open source and commercial tools - We have experience in testing systems and applications for many industries - Our engineers have conducted tests of various technologies. - We create advanced platform TestFactory for supporting the automation testing processes of mobile, web and desktop applications - We have implemented large testing campaigns involving several dozens of testers

Industry: Information Technology & Services