Performance Test Engineer Mid-Level

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 Performance Test Engineer to focus on load and performance testing for large-scale digital services. As part of your role, you will execute and analyze tests, maintain performance scripts, and work closely with developers to validate requirements. Ideal candidates should have hands-on experience with performance testing tools and a strong understanding of APIs. This role supports professional growth in an inclusive environment that values diversity.

Qualifications

• Proven experience in testing enterprise-level or distributed systems.
• A good understanding of APIs and HTTP protocols.
• Ability to analyze logs and monitoring data.

Responsibilities

• Run load, stress, and soak tests to identify system weaknesses.
• Maintain and update performance test scripts.
• Collaborate with developers to validate requirements.
• Execute tests in cloud-hosted environments.
• Report performance defects clearly.

Skills

Load testing

Performance testing scripts

Data analysis

Agile methodology

Tools

JMeter

Gatling

k6

LoadRunner

Job description

London, United Kingdom | Posted on 30/01/2026

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

Are you a Performance Tester who loves breaking things to make them better? We are looking for a Performance Test Engineer to join our team, focusing on load and performance testing for large-scale digital services.

This is a technical, delivery-focused role where you’ll work within structured environments to ensure that the services millions of UK citizens rely on are fast, resilient, and scalable. You will work under the guidance of a Lead Tester, giving you a fantastic platform to grow your technical expertise in a supportive, high-impact consultancy.

Key Responsibilities

Execute & Analyze: Run load, stress, and soak tests to identify where systems might struggle under pressure.

Scripting: Maintain and update performance test scripts using modern tooling.

Collaboration: Work with developers and architects to gather Non-Functional Requirements (NFRs) and validate capacity assumptions.

Environment Management: Execute tests within cloud-hosted (AWS) environments and help manage test data.

Defect Reporting: Raise clear, evidence-based performance defects and participate in triage sessions to help get them fixed.

Documentation: Contribute to test reports and keep execution runbooks up to date.

Performance Testing Foundation: Proven experience in testing enterprise-level or distributed systems.

Tooling: Hands-on experience with at least one major tool: JMeter, Gatling, k6, or LoadRunner.

Technical Knowledge: A good understanding of APIs, HTTP protocols, and how databases/caching affect performance.

Data Analysis: Ability to analyze logs and monitoring data to spot bottlenecks.

Agile Mindset: Comfortable working in Agile or hybrid delivery models.

Scope & Accountability

You will be responsible for the day-to-day execution of performance tests.

You’ll own the accuracy of your test results and provide clear recommendations to the team.

You will report to a Lead Performance Tester who will support your professional development.

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 underrepresented 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.