Senior Performance Test Engineer

Scrumconnect Ltd; Greater London; On-site; GBP 50,000 - GBP 70,000; Full time

Job summary

A leading digital consultancy in the UK is seeking a Senior Performance Tester to conduct hands-on load and performance testing for large-scale digital services. The ideal candidate will design and execute various performance tests, analyse performance results, and work closely with development and operations teams. Essential skills include experience with JMeter and other performance testing tools, as well as understanding of cloud-hosted environments. The company fosters diversity and innovative thinking within its teams.

Qualifications

• Strong experience in performance testing of enterprise systems.
• Experience working in regulated or high-assurance environments.
• Familiarity with Agile and hybrid delivery models.

Responsibilities

• Design and execute load, stress, volume, soak, and scalability tests.
• Analyse performance results, logs, and system metrics to identify bottlenecks.
• Prepare and maintain performance test scripts and execution runbooks.

Skills

Load, stress, volume, soak, and scalability testing

Performance testing of enterprise systems

Hands-on delivery using JMeter, Gatling, LoadRunner, k6

Solid understanding of APIs, HTTP, databases

Experience with APM tools

Tools

JMeter

Gatling

LoadRunner

k6

Dynatrace

AppDynamics

Elastic Search with Kibana/Grafana

Job description

Overview

London, United Kingdom | Posted on 29/01/2026

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. With a strong commitment to user-centred design and agile delivery, and more to deliver innovative digital services that matter.

Role Overview

We are looking for a Senior Performance Tester to deliver hands-on load and performance testing across large-scale digital services and backend applications, with experience of working with cloud-based distributed services.

This is a technical, delivery-focused role operating in structured and governed environments where performance, resilience, and scalability are critical to service success.

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)
• Solid understanding of APIs, HTTP, databases, messaging, caching
• Backend and distributed system performance characteristics
• Experience analysing logs and monitoring data
• Familiarity with Agile and hybrid delivery models
• Experience working in regulated or high-assurance environments
• Experience with APM tools (e.g. Dynatrace, AppDynamics, Elastic Search with Kibana/Grafana across digital services)
• Public-sector or large programme delivery experience
• Familiarity with GDS

Scope & Accountability

• Responsible for hands-on performance test design and execution
• Owns quality and accuracy of assigned test artefacts and results
• Contributes analysis and recommendations but does not hold final assurance authority
• Works under the direction of a Lead Performance Tester or Test Manager
• Accountable for timely delivery of agreed performance testing activities

Our Commitment to Diversity & Inclusion

At Scrumconnect Consulting, we believe thatdiversity drives innovation. We are committed to creating an inclusive environment where everyone is respected, valued, and supported. We actively encourage applications fromwomen, people with disabilities, individuals from under-represented communities, and those seekingflexible working arrangements.

As aDisability Confident Level 1 employer, we provide reasonable adjustments throughout the recruitment process and employment to ensure equal opportunity for all.