Senior Performance Tester: Cloud-Scale Load Specialist

Scrumconnect Limited

Staines-upon-Thames

On-site

GBP 60,000 - 90,000

Full time

14 days+

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Job summary

Scrumconnect Consulting in the United Kingdom is seeking a Senior Performance Tester to deliver hands-on load and performance testing across large-scale digital services and backend applications, including cloud-based distributed environments.

You will operate in governed settings where performance, resilience, and scalability are critical, working with developers, architects, and operations to identify bottlenecks and drive reliable releases.

Qualifications

Knowledge of APIs, HTTP, databases, messaging and caching
Experience with backend and distributed system performance
Experience with logs and monitoring data

Responsibilities

Design and execute load, stress, volume, soak, and scalability tests
Analyse performance results, logs, and system metrics to identify bottlenecks
Gather and Validate performance NFRs, volumetrics, and capacity assumptions
Prepare and maintain performance test scripts and execution runbooks
Execute tests in cloud-hosted (AWS) non-production environments
Raise performance defects with clear technical evidence
Support CI/CD integration for performance testing where required
Contribute to test reports, defect triage, and test completion evidence
Work closely with developers, architects, platform, and operations teams
Strong experience in performance testing of enterprise systems
Hands-on delivery using tools such as JMeter, Gatling, LoadRunner, k6 (or equivalent)