Lead Performance Tester (SC Cleared/SC Eligible) at Scrumconnect Consulting, London, £400-£450 per day (Outside IR35)

About Scrumconnect Consulting

Scrumconnect Consulting is a multi-award-winning digital consultancy, recognised for delivering impactful technology solutions across UK government departments. Our work has positively influenced the lives of over 40 million UK citizens.

We are driven by user-centred design, agile delivery, and a commitment to building innovative digital services that truly matter.

Role Overview

We are seeking a highly skilled Senior Performance Tester (Active SC Cleared) to deliver hands-on load and performance testing across large-scale digital services and backend applications.

This is a technical, delivery-focused role operating in structured and governed environments where performance, resilience, and scalability are critical to service success. The successful candidate will have experience working with cloud-based distributed services and performance testing within AWS-hosted environments.

Key Responsibilities

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  Design and execute load, stress, volume, soak, and scalability tests

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  Analyse performance results, logs, and system metrics to identify bottlenecks

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  Gather and validate performance Non-Functional Requirements (NFRs), volumetrics, and capacity assumptions

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  Prepare and maintain performance test scripts and execution runbooks

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  Execute performance tests in cloud-hosted (AWS) non-production environments

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  Raise performance defects with clear technical evidence

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  Support CI/CD integration for performance testing where required

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  Contribute to test reports, defect triage, and test completion evidence

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  Collaborate closely with developers, architects, platform, and operations teams

Essential Skills & Experience

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  Strong experience in performance testing of enterprise-scale systems

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  Hands-on delivery experience using tools such as:

  • 
    JMeter

  • 
    Gatling

  • 
    LoadRunner

  • 
    k6 (or equivalent)

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  Solid understanding of:

  • 
    APIs and HTTP protocols

  • 
    Databases

  • 
    Messaging systems

  • 
    Caching mechanisms

  • 
    Backend and distributed system performance characteristics

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  Experience analysing logs and monitoring data

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  Familiarity with Agile and hybrid delivery models

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  Experience working in regulated or high-assurance environments