System Tester jobs in City of London

System Tester - Contract - £450 outside IR35 - Hybrid (London 2 days per week) Kindly note that this is a contract position, and applicants are required to have the legal right to work in the UK. La Fosse has partnered with a leading entertainment business to support the recruitment of a skilled System Tester. The successful candidate will work with enterprise database systems, including...

You will work closely with the Product Manager, Quality Assurance Lead, and wider technical team to test new and updated functionality, investigate bugs, and contribute to the ongoing improvement of testing processes. This is a fantastic opportunity to work on a Salesforce-based application that makes a real difference, while also gaining exposure to automation and complex system testing.

QA Technical Tester Location: London | Hybrid / Contract We are seeking an experienced QA Analyst to join a dynamic Quality Assurance team, focusing on the RTB applications in a critical financial services environment. This role offers a unique opportunity to ensure the stability, reliability, and quality of production systems, with a focus on Front Office to Back Office applications. Key...

Mid/Senior Penetration Tester - Remote - Up to £60k - New Role (REF46) For a complete understanding of this opportunity, and what will be required to be a successful applicant, read on. A leading organisation that delivers IT solutions to over 2000 companies in the public and private sectors, requires a skilled and enthusiastic Penetration Tester to join its growing team. Suitable candidates...

Infrastructure and Software Tester +Permanent opportunity +Hybrid working on site in London 2/3 days a week +£42,000 - £45,000 Skills: +Software Testing experience +Infrastructure Testing experience +AWS / Azure +API +Manual and automated testing experience We’re looking for a hands-on Tester who’s as comfortable checking infrastructure deployments and systems performance as they are...

Non-Functional Tester Making sure you fit the guidelines as an applicant for this role is essential, please read the below carefully. We’re working with a global financial technology group undergoing a major transformation to modernise its post-trade infrastructure. The organisation is transitioning from legacy systems to a cloud-native, Kafka-based architecture designed for resilience,...

Penetration Tester Permanent – up to £85k per annum London based – hybrid working – 2-3 days office based Must have CHECK CTL and certified If you are interested in applying for this job, please make sure you meet the following requirements as listed below. Role Overview: We are seeking a highly skilled and experienced Offensive Security Consultant with a strong focus understanding on...

Senior Infrastructure Penetration Tester Location: London flexible hybrid Salary: £70,000 – £80,000 We’re hiring on behalf of our client, a growing Penetration Testing Consultancy, for a Senior Infrastructure Penetration Tester to join their elite Testing team. This role is ideal for someone who thrives on deep technical challenges, values autonomy, and enjoys working in a fast paced and...

Contract Java SDET – Hybrid (Swindon/London) | Inside IR35 | £400 - £425 per day A leading technology company is seeking a skilled Java SDET to join their dynamic team on a contract basis. You’ll play a key role in shaping, planning, and delivering high-quality testing across functional and non-functional areas, ensuring releases exceed customer expectations. Execute testing within Agile...

System Tester 3 Months London - Hybrid (1-2 days per week) £(Apply online only) per day (Inside IR35)My client, a bank is looking for a software tester to join their fast-paced team on an initial 3 month contract. This role is part of a strategic initiative to upgrade the existing Algo Collateral Management System. The legacy system, originally developed by IBM, is being replaced with the latest...

Systems Analyst, London, 3 days onsite, £70-£80k Do not pass up this chance, apply quickly if your experience and skills match what is in the following description. Our client, a well-known global brand, is seeking a Systems Analyst to join their IT Application Development Team based in London. This is a key role that will bridge the gap between business analysts and development teams, ensuring...

You will provide support in the implementation of new processes, systems, or features by working with various teams within the organization. The role involves a wide variety of tasks such as setting up new accounts, creating training documentation and training users, configuration of software, testing newly developed software features and maintaining key system data (e.g., Country lists)

Robert Half have partnered with a global manufacturing firm who are seeking a highly skilled QA Tester with both manual and automation testing experience on a initial 12-month rolling contract. This role is critical to ensuring the quality, functionality, and compliance of software and systems within a regulated environment. Key Responsibilities: Determine both general and specific quality...

Tester +Permanent opportunity +Hybrid working on site in London 2/3 days a week+£42,000 - £45,000Skills:+Software Testing experience+AWS / Azure+API+Manual and automated testing experience We're looking for a hands-on Tester who's as comfortable checking infrastructure deployments and systems performance as they are validating user journeys in an app. You'll work across a range of environments -...

You will identify and exploit vulnerabilities, simulate real-world attacks, and deliver actionable remediation guidance to strengthen defenses. Key Responsibilities: - Plan and execute penetration tests - perform manual and automated testing across applications, APIs, internal/external networks, cloud environments, and Active Directory.

Penetration Tester Permanent – up to £85k per annum London based – hybrid working – 2-3 days office based Must have CHECK CTL and certified Role Overview: We are seeking a highly skilled and experienced Offensive Security Consultant with a strong focus understanding on threat intelligence and attack methods. The ideal candidate will be responsible for managing and conducting advanced penetration...

Non-Functional Tester We’re working with a global financial technology group undergoing a major transformation to modernise its post-trade infrastructure. The organisation is transitioning from legacy systems to a cloud-native, Kafka-based architecture designed for resilience, scalability, and performance. You’ll be part of a growing Non-Functional Testing (NFT) team responsible for ensuring that...

You will work closely with the Product Manager, Quality Assurance Lead, and wider technical team to test new and updated functionality, investigate bugs, and contribute to the ongoing improvement of testing processes. This is a fantastic opportunity to work on a Salesforce-based application that makes a real difference, while also gaining exposure to automation and complex system testing.

QA Technical Tester Location: London | Hybrid / Contract We are seeking an experienced QA Analyst to join a dynamic Quality Assurance team, focusing on the RTB applications in a critical financial services environment. This role offers a unique opportunity to ensure the stability, reliability, and quality of production systems, with a focus on Front Office to Back Office applications. Key...

Manual Penetration Tester Find out more about this role by reading the information below, then apply to be considered. Fully Remote We're proud to be working with a renowned MSP in support of their search for an experienced Manual Penetration Tester. Key Responsibilities - Carry out hands-on penetration testing across applications, infrastructure, and networks, with a particular focus on web...