Performance Tester - SC clearance required

Location:

Hybrid – London (3 days a week in central London, travel expenses covered)

Clearance:
Active SC Clearance (used within the last 12 months) – sole UK citizenship required

The digital transformation partner for highly regulated industries. Our teams deliver digital transformation for organisations operating in complex, highly regulated environments. From securing national borders to supporting critical defence operations, we deliver secure AI, data, cloud and software solutions across high-stakes programmes.

We're looking for SC Cleared Performance Testers to join us on a permanent basis, supporting a major UK government transformation programme focused on building secure, scalable cloud platforms that underpin critical digital services.

You'll play a key role in making sure these services are fast, resilient and able to perform 'll design, build and run performance tests, analyse the results and work closely with delivery teams to identify and resolve bottlenecks before they affect the people who rely on these services.

We're looking for someone with strong, hands‑on Performance Testing experience using JMeter, who is comfortable turning test results into clear, practical recommendations for both technical and non‑technical stakeholders.

• Designing, scripting and executing performance tests using JMeter across secure cloud platforms
• Planning and running load, stress, soak and spike tests to validate performance and scalability
• Working with delivery teams to define and validate non‑functional requirements such as response times, throughput and capacity
• Analysing test results to identify performance bottlenecks and recommend improvements
• Using monitoring and observability tools to investigate performance issues across applications and infrastructure
• Producing clear test reports and presenting findings to technical and non‑technical stakeholders
• Supporting the integration of performance tests into CI/CD pipelines
• Collaborating with engineers, architects and testers within agile, multi‑disciplinary delivery teams

You will need:

• Strong, hands‑on experience in Performance Testing
• Strong experience designing, scripting and maintaining test plans using Apache JMeter
• Experience with parameterisation, correlation and assertions to build realistic, reusable test scenarios
• Experience planning and running load, stress, soak and spike tests
• Experience defining and validating non‑functional requirements
• Experience performance testing applications and services hosted on cloud platforms
• Ability to analyse results, identify bottlenecks and provide clear recommendations
• Strong communication skills, with the ability to explain technical findings clearly
• Active SC Clearance, used within the last 12 months
• Running JMeter tests at scale using distributed or cloud‑based load generation
• Integrating performance tests into CI/CD pipelines
• Experience with monitoring, APM or observability tools
• Experience working within UK government or other highly regulated environments

Please note:

Due to the secure nature of this work, we can only consider candidates who hold sole UK citizenship and active SC Clearance that has been used within the last 12 months.

We believe benefits should be practical: things that genuinely support your day‑to‑day, give you flexibility and help you keep developing.

Here are a few of our perks:

• Private medical insurance with Bupa
• Hybrid working, with travel expenses covered for your London office days
• Personal training budget to support your professional development
• Perkbox membership, with discounts across retail, travel, dining and wellness
• Electric Vehicle Scheme after one year of service
• Referral scheme…