Non Functional Tester

The Non-Functional Tester is responsible for validating the performance, scalability, reliability, and accessibility of enterprise applications. The role designs and executes non-functional test strategies, analyses results, and partners with engineering and business stakeholders to ensure systems meet defined non-functional requirements (NFRs).

Responsibilities

• Understand Non-Functional Requirements (NFRs) and scope from client documentation.
• Develop and maintain non-functional test strategies and plans aligned with business and technical objectives.
• Design and execute performance tests using tools such as JMeter, Azure Load Test to evaluate system scalability and reliability, reporting using BlazeMeter.
• Perform accessibility testing using Wave, Axe to ensure compliance with WCAG and other accessibility guidelines.
• Analyse test results to identify trends, patterns, and areas for improvement in system performance.
• Prepare detailed test reports, including metrics such as response times, throughput, and defect summaries.
• Collaborate with developers, architects, and business analysts to resolve non-functional issues and optimize system performance.
• Conduct load, stress, soak, and spike testing to validate system behaviour under varying conditions.
• Integrate non-functional tests into CI/CD pipelines to enable continuous performance validation.
• Define non-functional acceptance criteria and service-level objectives (SLOs) in collaboration with stakeholders.

Qualifications

• Should have experience in non-functional / performance testing of enterprise web and API-based applications.
• Hands-on expertise with performance testing tools such as Apache JMeter and Azure Load Testing, with result analysis and reporting in BlazeMeter.
• Experience with accessibility testing tools such as WAVE and Axe, and a working knowledge of WCAG 2.1/2.2 compliance standards.
• Strong understanding of non-functional requirements including performance, scalability, reliability, availability, and security.
• Ability to analyse performance metrics (response time, throughput, latency, resource utilisation) and identify bottlenecks.
• Familiarity with APM and monitoring tools (e.g., Dynatrace, AppDynamics, Grafana) for system observability.
• Experience integrating performance tests into CI/CD pipelines (e.g., Azure DevOps, Jenkins, GitLab).
• Working knowledge of cloud platforms (Azure / AWS) and containerised environments.

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