Queen Square Recruitment
Performance Tester
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Performance Tester – Transformation Programme
📍 Reading (2 days onsite per week)
⏳ 6-Month Initial Contract
📌 Inside IR35, day rate TBC (likely in the region of £375 - £400)
🚀 ASAP Start
We are seeking an experienced Performance Tester to join a major transformation programme, supporting the non-functional validation of critical billing systems, integrations, and dual-run operations. This role will focus on ensuring system scalability, responsiveness, throughput, and stability under both real-world and peak demand conditions, helping to ensure business-critical billing processes perform reliably throughout the programme lifecycle.
The Role
As a Performance Tester, you will be responsible for designing, executing, and analysing performance test activities across complex integrated systems. You will work closely with developers, architects, business analysts, and infrastructure teams to identify bottlenecks, validate non-functional requirements, and provide performance assurance ahead of key programme milestones.
Key Responsibilities
- Analyse performance testing requirements, including user load, throughput, transaction volumes, and usage patterns
- Prepare Performance Test Strategies and Test Plans aligned to programme milestones
- Design and develop performance test scripts using JMeter and/or LoadRunner
- Execute load, stress, endurance, and volume testing
- Monitor application and infrastructure performance using Dynatrace, AppDynamics, or Azure Monitor
- Analyse test results and identify performance bottlenecks and system limitations
- Deliver performance reports, dashboards, and tuning recommendations
- Manage performance defects through to resolution
- Support dual-run validation to ensure stable billing operations
- Validate high-volume transactions across multiple integrated systems
- Work closely with development, architecture, and support teams to resolve performance issues
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Key Deliverables
- Performance Test Strategy and Test Plan
- Test Scripts and Workload Models
- Execution Reports and Performance Dashboards
- Bottleneck Analysis and Root Cause Investigations
- Performance Test Summary and Sign-Off Reports
Required Skills & Experience
- 5-10 years' experience in Performance Testing / Non-Functional Testing
- Strong hands-on experience with JMeter, LoadRunner, or NeoLoad
- Experience creating workload models and realistic performance scenarios
- Strong understanding of performance engineering principles
- Experience delivering load, stress, endurance, and volume testing
- Experience working in Agile and DevOps environments
- Strong analytical and problem-solving skills
- Excellent communication and stakeholder engagement skills
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Desirable Experience
- Utilities, billing, or CIS systems experience
- Experience supporting transformation, migration, or dual-run programmes
- Experience working within complex multi-vendor environments
- Experience with proactive risk identification and mitigation
Why Apply?
✅ Join a high-profile transformation programme
✅ Work with enterprise-scale billing and integration platforms
✅ Exposure to complex performance engineering challenges
✅ Hybrid working with a collaborative delivery team
📩 If you're an experienced Performance Tester looking for your next contract opportunity, we'd love to hear from you. Apply today with your latest CV.
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