Performance Tester

Role: Performance Tester

Work Model & Location: Hybrid - 2-3 day onsite in Reading

Duration: 6 Months+

The role involves validating system scalability, response time, throughput, and stability under real-world and peak load conditions to ensure business-critical billing processes operate without performance degradation.

Our client, working with a British multinational energy company who are a constituent of the FTSE 100 Index are seeking an experienced Performance Tester to support the Keystone transformation program, focusing on non-functional validation of billing systems, integrations, and dual run operations.

Your responsibilities:

• Analyse performance testing requirements including user load, throughput, transaction volumes, and usage patterns

• Prepare Performance Test Strategy and Test Plan aligned to program milestones

• Design and develop performance test scripts using JMeter and/or LoadRunner

• Execute load, stress, endurance, and volume testing

• Monitor application performance using tools such as Dynatrace, AppDynamics, or Azure Monitor

• Analyse results and identify bottlenecks and system limitations

• Prepare performance reports and tuning recommendations

• Manage performance defects through to resolution

• Support dual run validation ensuring stable billing operations

• Validate high-volume transactions across multiple integrated systems.

Your Profile

Essential skills/knowledge/experience:

• 5 10 years of experience in Performance Testing / Non-functional Testing

• Strong experience with JMeter, LoadRunner, or NeoLoad

• Understanding of workload modelling and performance engineering concepts

• Experience in Agile / DevOps environments

• Experience in utilities or billing systems is highly desirable

Key Deliverables

• Performance Test Strategy and Plan

• Test Scripts and Workload Models

• Execution Reports and Dashboards

• Bottleneck Analysis and RCA

• Performance Test Summary and Sign-off Report

Desirable skills/knowledge/experience:

• Strong analytical and problem-solving skills

• Excellent communication and stakeholder management

• Ability to work in multi-vendor environments

• Proactive risk identification and mitigation