QA Performance Test Engineer

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Location:

UK (remote)

Employment Type:

Full time

Position: QA Performance Test Engineer

Minimum Experience:

Five years plus of related professional QA experience

Compensation:
Competitive

Black Rainbow is seeking a QA Performance Test Engineer to join our growing team. The ideal candidate will lead the load and performance test activities, following the strategy set by the QA manager, to ensure delivery of a high quality and performant software application.

Black Rainbow was founded to address the inefficiencies in investigation case management experienced by Investigators across Law Enforcement, Government, and Corporate at an enterprise level. Our flagship product, NIMBUS, is rapidly becoming the global standard for innovative case management solutions. With over two decades of experience supporting Investigators and Analysts in more than forty countries, we understand the unique challenges of both public and private sector investigations and build solutions that meet their evolving needs.

The Performance Engineer will play a key role in verifying that the Black Rainbow software runs efficiently and reliably. This includes identifying bottlenecks and making recommendations for system optimizations, to ensure the software meets expected demand and any contractual non‑functional requirements.

Our ideal candidate will have multiple years' experience of developing and maintaining load and performance tests, with strong knowledge of analysing system responsiveness and scalability. Existing UK SC & NPPV3 vetting is an advantage.

• Design, develop, and maintain load test scripts to simulate realistic user workloads
• Establish and baseline performance test scenarios to evaluate system behaviour under expected and peak load conditions
• Execute load tests against candidate releases to confirm performance improvements and ensure no degradation in application performance
• Analyse test results, measure key performance metrics (e.g., response time, throughput, latency), and identify bottlenecks or scalability issues
• Collaborate with development and stakeholders to provide actionable insights and recommendations for performance optimization
• Generate detailed performance reports to support data‑driven decisions on release suitability
• Continuously improve testing processes by leveraging JMeter’s scripting capabilities and integrating with CI/CD pipelines
• Stay updated on industry best practices and emerging tools for performance testing
• Maintain and expand existing documentation (test cases, wiki etc.) to create a repeatable and scalable test environment
• Participate in project meetings to ensure that testing is built into all projects from the start
• Document, track and elevate issues as appropriate
• Use Scrum Agile methodologies to help drive and deliver product releases
• Actively participate in scrum events: refinement, planning, stand‑ups, reviews and retrospectives

• Eligible to work in the UK or Republic of Ireland
• Five years plus of related professional QA experience with proven experience in performance and load testing, preferably using Apache JMeter and Azure Dev Ops
• Experience of web‑based testing and browser Dev Tools
• Experience of writing test cases for and testing multi‑tier systems;
  Database, App Servers, Web and Mobile Apps
• Strong understanding of performance testing methodologies, including workload modelling and benchmarking
• Proficiency in creating and maintaining test scripts to simulate complex user interactions
• Ability to analyse performance metrics and identify bottlenecks using tools like JMeter, Azure Dev Ops, or similar platforms
• Familiarity with CI/CD pipelines and integrating performance tests into automated workflows
• Understanding of software development practices and Agile methodologies
• Strong problem‑solving skills and attention to detail in analysing test results and diagnosing performance issues
• Excellent communication skills to collaborate with cross‑functional teams and present findings clearly
• Experience of Jira, Confluence and/or MS/Azure Dev Ops for managing the Agile…