Performance Tester

Salary: £? - ? per year

Requirements:

• 5–10 years of experience in Performance Testing or Non-functional Testing
• Strong experience with JMeter, LoadRunner, or NeoLoad
• Understanding of workload modelling and performance engineering concepts
• Experience in Agile or DevOps environments
• Experience in utilities or billing systems is highly desirable
• Strong analytical and problem-solving skills
• Excellent communication and stakeholder management skills
• Ability to work in multi-vendor environments
• Proactive risk identification and mitigation

Responsibilities:

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

Technologies:

• Azure
• DevOps
• Dynatrace
• Support
• JMeter
• Cloud

More:

We are supporting a British multinational energy company and a constituent of the FTSE 100 Index on the Keystone transformation program. This role focuses on non-functional validation of billing systems, integrations, and dual run operations, ensuring business-critical billing processes remain stable under real-world and peak load conditions. The position involves working in a complex, multi-system environment with high-volume transaction validation and close collaboration across stakeholders.

last updated 32 week of 2026