97 Senior Performance Tester jobs in the United Kingdom

Senior Performance Tester - Non-functional - 3 month contract - paying £550 Inside IR35 - Hybrid (2 days a week)

We’re looking for an experienced Senior Performance Tester to join a high-performing team working on a global streaming platform that powers millions of users across video-on-demand and live services.

What you’ll do:

• Develop and maintain a Gatling-based performance testing framework integrated into CI/CD pipelines.
• Define non-functional requirements and performance acceptance criteria.
• Analyze performance test results and production metrics to identify trends, risks, and improvements.
• Work with modern technologies including Docker, Kubernetes, Kafka, and NoSQL databases.
• Mentor junior testers and drive continuous improvement in performance testing practices.

What we’re looking for:

• 5+ years’ experience in non-functional/performance testing for large-scale applications.
• Hands-on experience with Gatling and open-source performance tools.
• Strong knowledge of CI/CD tools (Jenkins, GitHub Actions, Gradle/Maven).
• Skilled in monitoring/logging with Prometheus and Grafana.
• Proficiency in scripting languages (Scala, Python, Shell).

This role offers the chance to make an impact on a global platform, work with cutting-edge tech, and collaborate with a talented cross-functional team.

Ready to join a team that's leading the way in reshaping the future of insurance? Here at esure Group, we are on a mission to revolutionise insurance for good!

We’ve been providing Home and Motor Insurance since 2000, with over 2 million customers trusting us to keep them covered through our esure and Sheilas’ Wheels brands. With a bold dedication for digital innovation, we're transforming the way the industry operates and putting customers at the heart of everything we do.

Having completed our recent multi-year digital transformation, we’re now leveraging advanced technology and data-driven insights alongside exceptional service, to deliver personalised experiences that meet our customers ever-changing needs today and in the future.

We are currently seeking a Performance Tester to join our innovative technology department.

The Performance Tester will work collaboratively with wider teams to help, such as QA Engineers, DevOps, Platform Engineers and Software Engineers to develop and build esure’s future performance testing capability.

We are looking for a pure performance specialist, ideally with Gatling, or similar, experience and good knowledge of Java. This role isn’t just about writing scripts — it’s about diving deep into performance analysis, mastering debugging, and pinpointing exactly where the bottlenecks are holding things back

What you’ll do:

• Member of multi-discipline team shaping esure’s future performance testing capability
• Proactively improves application performance, reliability, processes and continuous improvement culture
• Defines, tests and reports NFRs across customer journeys and services
• Delivers automated performance, load, stress and endurance testing to meet requirements
• Uses leading tools like Gatling, JMeter and k6 for testing
• Builds and maintains frameworks integrating with CI/CD pipelines and DevOps workflows
• Creates and delivers end-to-end performance test strategies and plans
• Drives testing improvements, automation, and active engagement in testing communities

What we’d love you to bring:

• A background in software testing and performance testing
• Experience with object orientated programming, preferably Java, Selenium and TestNg/Junit. Experience with API testing is also essential.
• Must have experience in automation testing where you have actively created and maintained frameworks.
• Skilled in comprehending intricate systems that include API, serverless options, legacy Java platforms, and databases.
• Proficient in deciphering intricate systems that involve a blend of API, serverless solutions, outdated java infrastructures, and databases
• Previous background working within high traffic, highly transactional online environments
• Experience of working in an agile, SCRUM & Dev Ops delivery model

The Interview Process  (subject to change):

• You’ll start with an introductory call with one of our Talent Partners. This is a ‘get to know you session’ and for you to explore the position in more detail.
• 1st stage interview: 30 minute interview with one of our QA Leads
• 2nd stage: 1 hour technical interview to showcase your automation and software engineering skills and experience with one of our QA Leads and Senior QA Engineers.

What’s in it for you?:

• Competitive salary that reflects your skills, experience and potential.
• Discretionary bonus scheme that recognises your hard work and contributions to esure’s success.
• 25 days annual leave, plus 8 flexible days and the ability to buy and sell further holiday.
• Our flexible benefits platform is loaded with perks to choose from, so you can build a personal toolkit to support your health, wellbeing, lifestyle, and finances.
• Company funded private medical insurance for qualifying colleagues.
• Fantastic discounts on our insurance products! 50% off for yourself and spouse/partner and 10% off for direct family members.
• We’ll elevate your career with hands-on training, mentoring, access to our exclusive academies, regular career conversations, and expert partner resources.
• Driving good in the world couldn’t be more important to us. Our colleagues can use 2 volunteering days per year to support their local communities.
• Join our internal networks and communities to connect, learn, and share ideas with likeminded colleagues.
• We’re a proud supporter of the ABI’s ‘Make Flexible Work’ campaign and welcome you to ask about the flexibility you need. Our hybrid working approach also puts you in the driving seat of how and where you do your best work.
• And much more; See a full overview of our benefits here Reward and benefits | Esure Group PLC

We are committed to creating an inclusive and diverse workplace where everyone feels valued, respected, and empowered. We celebrate individuality and create spaces where unique backgrounds and experiences can come together. We believe that diverse perspectives drive innovation, in turn enabling us to better serve our customers, community and build a stronger organisation. Our commitment to inclusion extends to every part of our business, from hiring practices to professional growth opportunities, ensuring equal access and support for all.

Senior Performance Tester - Non-functional - 3 month contract - paying £550 Inside IR35 - Hybrid (2 days a week)

We're looking for an experienced Senior Performance Tester to join a high-performing team working on a global streaming platform that powers millions of users across video-on-demand and live services.

What you'll do:

• Develop and maintain a Gatling-based performance testing framework integrated into CI/CD pipelines.
• Define non-functional requirements and performance acceptance criteria.
• Analyze performance test results and production metrics to identify trends, risks, and improvements.
• Work with modern technologies including Docker, Kubernetes, Kafka, and NoSQL databases.
• Mentor junior testers and drive continuous improvement in performance testing practices.

What we're looking for:

• 5+ years' experience in non-functional/performance testing for large-scale applications.
• Hands-on experience with Gatling and open-source performance tools.
• Strong knowledge of CI/CD tools (Jenkins, GitHub Actions, Gradle/Maven).
• Skilled in monitoring/logging with Prometheus and Grafana.
• Proficiency in scripting languages (Scala, Python, Shell).

This role offers the chance to make an impact on a global platform, work with cutting-edge tech, and collaborate with a talented cross-functional team.

There's 2 brand new roles available to join a highly respected Consulting Business that operate within the Financial space. You'll be part of one of the largest Financial Trading transformation projects in the world(!) and set up for an exciting career trajectory with the support of brilliant Test Managers.

Title: Test Automation Engineer - QA

Company: Consultancy - Financial

Location: London Hybrid (often 3 days a week in office)

Salary: £50,000-£5,000 + benefits

Tech essentials : Backend (C#/Java/Python) SQL, Specflow/BDD

Nice to have: CI/CD pipes, GitHub Actions, YAML, Powershell

Interview process: 1 stage remote video interview

Why should you be interested in this opportunity?

• They've gone from strength to strength over the last 10 years as they’ve strategically positioned themselves as essential partners to major financial corporations.
• They have multi-year contracts in place to continue working in partnership with blue chip £b lion organisations as they expand into new territories.
• Software Quality is at the very core of what they do. They’re deeply passionate about delivering Quality Software and Test-Driven Development is in their DNA.
• You’ll work alongside a team of highly experienced Test Automation experts from diverse backgrounds
• Extensive investment into your training, onboarding and becoming a subject matter expert in their specialism
• The opportunity for upward promotion is endless and they are active looking for future leaders

Why they’ll be interested in you -

• You have solid Programming experience, with a keen interest in Software Quality & Testing
• C# or Python or Java knowledge needed
• You probably have a relevant degree at 2:1 level or above
• You may have 1-3 years commercial experience, but they're open with this
• You’re naturally inquisitive, curious and interested in learning and development
• Good communication skills are vital as you’ll be representing the company in a client-facing role

Keen to find out more? Full job spec and company information available

There's 2 brand new roles available to join a highly respected Consulting Business that operate within the Financial space. You'll be part of one of the largest Financial Trading transformation projects in the world(!) and set up for an exciting career trajectory with the support of brilliant Test Managers.

Title: Test Automation Engineer - QA

Company: Consultancy - Financial

Location: London Hybrid (often 3 days a week in office)

Salary: £50,000-£5,000 + benefits

Tech essentials : Backend (C#/Java/Python) SQL, Specflow/BDD

Nice to have: CI/CD pipes, GitHub Actions, YAML, Powershell

Interview process: 1 stage remote video interview

Why should you be interested in this opportunity?

• They've gone from strength to strength over the last 10 years as they’ve strategically positioned themselves as essential partners to major financial corporations.
• They have multi-year contracts in place to continue working in partnership with blue chip £b lion organisations as they expand into new territories.
• Software Quality is at the very core of what they do. They’re deeply passionate about delivering Quality Software and Test-Driven Development is in their DNA.
• You’ll work alongside a team of highly experienced Test Automation experts from diverse backgrounds
• Extensive investment into your training, onboarding and becoming a subject matter expert in their specialism
• The opportunity for upward promotion is endless and they are active looking for future leaders

Why they’ll be interested in you -

• You have solid Programming experience, with a keen interest in Software Quality & Testing
• C# or Python or Java knowledge needed
• You probably have a relevant degree at 2:1 level or above
• You may have 1-3 years commercial experience, but they're open with this
• You’re naturally inquisitive, curious and interested in learning and development
• Good communication skills are vital as you’ll be representing the company in a client-facing role

Keen to find out more? Full job spec and company information available

We are seeking a highly motivated Test Automation Engineer to join our team. The successful candidate will play a key role in designing, building, and maintaining automated testing solutions that ensure the delivery of high-quality, secure, and reliable software.

This role requires a strong technical background in test engineering, excellent collaboration skills, and a proven ability to work in fast-paced Agile environments.

Responsibilities:

• Automated testing of deployments to cloud environments (e.g. AWS, EKS etc.) through pipelines
• Improving the quality of infrastructure deployments through automated testing - reducing issues arising after deployment.
• Test the actual instance/infrastructure itself and less the application that is being deployed
• Testing instances to make sure they have been deployed correctly and are working as expected. 
• Chaos testing of deployments/instances to make sure that they behave as expected if an instance goes down for some reason. 
• Define the approach for setting up the test infrastructure and use the outputs to drive technical improvements.
• Communicate with other teams and share technical resources, knowledge and lessons learned (with regards to testing automation)
• Infrastructure-as-Code testing principles.

Requirements

• Strong knowledge of test engineering best practices .

• Experience with functional and non-functional testing (performance, security, accessibility, etc.).
• Skilled in systems integration testing and microservices/API testing .
• Hands-on experience with security testing and understanding of associated risks.
• Proficiency in performance testing methodologies and tools.
• Proven ability to develop and maintain automated test suites .
• Experience with test infrastructure tools such as Docker and containerisation.
• Strong understanding of TDD and BDD principles .
• Familiarity with CI/CD pipelines and automation in build and deployment workflows.
• Strong Java (11/17/21) development experience and knowledge of the Spring Boot framework .
• Experience with test frameworks such as Cucumber, REST Assured, and WireMock.
• Hands-on knowledge of front-end testing frameworks such as Selenium.
• Experience in accessibility testing in line with WCAG standards.
• SC Security Clearance (or eligibility) required to access production logs.

Desired Attributes

• Excellent problem-solving and analytical skills.
• Strong communication skills, able to clearly convey technical findings to non-technical stakeholders.
• Proactive approach to identifying risks, issues, and improvements.
• Passion for continuous learning, technology, and quality assurance.

Benefits

What we offer

• A company culture based on respect, transparency, and equality.
• Flexible work hours and hybrid remote work.
• 25 days' holiday plus bank holidays
• Training and Career Progression

Sharing the culture

Infotel UK is an equal opportunity employer, and we pride ourselves on our diversity. That includes your gender identity, sexual orientation, religion, ethnicity, age, or disability status.

We have an incredible team ethic; we work together to consistently deliver for our clients. We host after-work gatherings and other in-house events to ensure our team members develop strong relationships and enjoy their work environment.

Join the Infotel UK Team! 

This is an outstanding opportunity to join a growing global company and leverage your expertise to achieve exceptional results. 

Apply today with your CV! All applications will be treated with strict confidentiality

Paragraf’s patented contamination-free deposition technology delivers game-changing opportunities for the commercialisation of graphene by allowing us to manufacture high-purity 2D graphene sheets at scale.

Paragraf is the first company in the world to mass produce graphene-based electronic devices using standard semiconductor processes. We not only specialise in the manufacture of high-purity graphene but also its seamless integration into ready to use products that can be quickly adopted by our customers and partners to support the advancement of their technologies.

At Paragraf we are committed to materially transforming electronics through the development of high-purity graphene products that will facilitate massive improvements in the performance of technologies across all aspects of life.

Founded as a spin out from Cambridge University in 2017 with the aim of transferring the technology from the academic lab into a commercial entity. Since then, we have grown from one site in Somersham, Cambridgeshire and three employees to a team of over 100 amazing people and an additional production facility in Huntingdon as well as sales teams globally promoting Paragraf.

The Role

This role focuses on developing and maintaining automated test equipment to ensure the high quality and performance of our products. You will guide projects through requirements elicitation, design, development, test, release and support. Outside of test, you will use your experience and knowledge to create robust and efficient solutions to assist in other areas of the company, as well as driving best practice and industry standards. Solutions will include a multi discipline collaboration of skills and departments.

Responsibilities & Tasks

• Design and develop internal software using a selection of programming languages (Python / C#/ C++ / LabView), to support the manufacture and testing of our Graphene electronics products.
• Support the development of automated test equipment by writing software to communicate with hardware for motion control and data acquisition.
• Support the integration of production systems (MES/ERP) with internal software applications, e.g. through the development of APIs.
• Design and integrate Microsoft SQL databases for test data storage, manufacturing tracking, and system configuration.
• Collaborate with mechanical, electrical, and data engineers throughout a system’s development and production life cycle.
• Troubleshoot systems issues involving both software and hardware.
• Maintain effective communication with cross-functional stakeholders to elicit functional and non-functional software requirements, ensuring alignment with business / product needs.
• Own Solution Project Plans and reporting of progress & updates to Management.
• Take a proactive approach to CI/CD and Testing, ensuring best practice and longevity is at its core and provide professional documentation and frameworks.
• Manage Git repositories as administrator, deciding on permission and workflow setups.
• Manage subordinates’ workload and line management as and when required.
• Maintain and promote excellent understanding of software design principles for efficient and maintainable code.
• Continuously seeking new ways for automation to drive company efficiency.
• Deliver tactical quick wins and show adaptability and flexibility with day to day activity.
• Be a Critical Thinker, understanding requirements and novel ways to deliver solutions effectively.
• Comfortable working autonomously on fast-paced, high output projects
• Be enthusiastic about challenges, potentially beyond the initial scope of the role, and motivated by a new opportunity.

Requirements

Education and Qualifications

• Computer science degree or equivalent software development experience from time in industry.

Experience

• Experience developing software in Python / C# / C++ / LabView / SQL and writing testable, maintainable code.
• Experience creating and maintaining predominantly internal software solutions for data acquisition, processing, modelling and visualisation.
• 3+ years of experience in automated test equipment software development for manufacturing and system integration.
• Experience working within cross-functional teams on the design and delivery of internal instrumentation / tools.
• Experienced with Git for version control.
• Experience with agile workflow and supporting software (e.g. Jira).
• Experience designing and maintaining database architectures in relational databases.
• Experience providing top-level technical summaries to support development within a NPD framework.
• Experience working in a fast-paced R&D environment.
• Ability to face into challenges and adapt.

Preferred Skills that Set You Apart

• Experience with production system configuration / development (e.g. MES/ERPs).
• Comfortable working with the Scrum framework.

Communication

• Excellent communication skills with the confidence to contribute and encourage ideas generation to senior management
• Effectively communicate technical information, and to report on status of work in a timely manner to senior management
• Ability to present information clearly and appropriately for the audience

Additional factors

• Respect and adherence to confidentiality and critical matters
• Responsible for ensuring a safe and healthy work environment by complying with company policies and processes and all relevant regulations including the use of PPE, as appropriate to the level and scope of the role. This includes participation in health and safety training and reporting of any potential hazards or breaches of safety protocols in the appropriate manner.
• Willing to travel both domestically and abroad

Benefits

At Paragraf we are constantly looking for new ways to support and reward our team. This is our current list of benefits, they are subject to change and review:

• Group Personal Pension Plan- Employer contribution 5%, Employee contribution minimum 4%
• Private health insurance on completion of probation
• Share Option scheme
• Death in service of 3 times salary and income protection on completion of probation
• 25 days holiday, plus bank holidays, and the chance to ‘purchase’ up to 5 additional days each year
• Personal and Professional Development Plans and support
• Employee Assistance Programme
• Cycle to work scheme
• Electric Vehicle Lease Scheme
• Payroll Giving scheme

Test Automation Lead – Digital Transformation

Join a business that’s reimagining one of the UK’s most iconic brands. This role sits at the heart of a major digital transformation, ensuring the delivery of robust, scalable and future-proofed testing for web and mobile platforms that will directly impact millions of users.

Role Overview:

• Location: Watford (3 days per week in the office)
• Package: Competitive + benefits
• Industry: Digital / Lottery / Technology

What You’ll Be Doing:

• Define and deliver the test automation strategy across web and native mobile applications.
• Embed continuous testing into CI/CD pipelines to ensure early and efficient validation.
• Oversee all aspects of digital testing across internal teams and external partners.
• Act as a technical authority for mobile app testing, resolving issues and guiding best practice.
• Coach, mentor and review code for automation engineers across multiple agile squads.
• Drive improvements in quality processes, tools and standards to support a shift-left approach.
• Align with central automation teams to evaluate and implement new tools.

Main Skills Needed:

• Strong background in building test automation frameworks for iOS, Android and web.
• Programming experience in Swift, Objective-C, Java, JavaScript or TypeScript.
• Hands-on expertise with CI/CD pipelines (ideally GitHub Actions or similar).
• Experience setting up and managing onsite or cloud-based device labs.
• Familiarity with BDD frameworks (e.g. Cucumber) and unit testing tools.
• Solid knowledge of API and web automated testing.
• Track record of coaching teams, reviewing code, and setting technical standards.
• Excellent communicator with an automation-first mindset.

What’s in It for You:

• Be part of a once-in-a-lifetime transformation project.
• Work with cutting-edge technologies and modern automation frameworks.
• A collaborative, inclusive environment where your expertise will have real influence.
• Opportunities to mentor, lead and shape best practices across a large digital function.
• Flexible working with a blend of office collaboration and remote delivery.

Careers move fast. Let’s make sure yours is heading the right way.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

By applying you are confirming you are happy to be added to the Addition Solutions mailing list regarding future suitable positions. You can opt out of this at any time simply by contacting one of our consultants.