Performance Tester

Salary: £55,000 - 95,000 per year

• We are looking for experienced Non Functional Test Engineers with demonstrable experience in Performance Testing and Non Functional Testing.
• We require previous experience working as a performance tester/engineer.
• We require experience developing, executing, and maintaining performance test scripts, ideally using Gatling, JMeter, or Load Runner.
• We require the ability to work on multiple projects at the same time and manage time effectively.
• We require good interpersonal skills and experience working with client teams or third parties.
• We require excellent written and spoken communication skills with the ability to engage successfully with team members and clients.
• Experience in other areas of NFT such as Accessibility, Compatibility, Usability, and Disaster Recovery would be beneficial.
• We will not consider candidates without demonstrable performance testing experience.

• We work on a variety of performance testing projects covering API, Front End, and UI-based performance testing.
• We gather performance test requirements through project and client engagement meetings and review NFRs.
• We develop performance test scripts.
• We execute and report on performance tests to technical and business stakeholders.
• We highlight any performance test failures against NFRs.
• We carry out performance testing against Azure infrastructure.
• We carry out performance test analysis.
• We analyse NFRs to ensure they are clear and testable.
• We ensure issues and risks are clearly communicated to relevant stakeholders in a timely manner.

• AI
• API
• Azure
• Dev Ops
• JMeter
• UX UI Design
• Cloud
• Support
• Security

We are Solirius Reply, part of the Reply Group, a technology consultancy and digital transformation partner helping organisations solve complex challenges through strategy, design, engineering, and delivery. We work closely with public and private sector clients, including the Ministry of Justice, Department for Education, Ministry of Housing, Communities and Local Government, UEFA, the International Olympic Committee, and Mercedes-Benz. Our services cover the full digital delivery lifecycle, including architecture, engineering, delivery management, user-centred design, business analysis, data, Dev Ops, and AI.

We offer a competitive salary, bonus scheme, private healthcare insurance, 25 days annual leave plus bank holidays, up to 10 days of development training per year, enhanced parental leave, paid fertility leave, pension, EAP with Help@Hand, gym membership benefits, cycle to work and electric vehicle schemes, flexible working, and annual away days/company socials. We are a collaborative and inclusive employer committed to equality, diversity, social mobility, and accessible recruitment, and we foster a culture where people can take ownership, innovate, and grow.

last updated 36 week of 2026