26 to 50 of 58 Tester Jobs in London

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 testing More ❯

Salesforce Software Tester – Salesforce Platform Application - Location: Fully remote or London Hybrid Salary: £35,000 - £40,000 We are working exclusively with a well-established not-for-profit technology provider who are looking to add a Software Tester to their Product Team. This organisation develops and delivers a specialist client-recording system built on the Salesforce platform, and they are … seeking a dedicated tester to ensure product quality and reliability as the solution continues to evolve. The Role As a Software Tester , you will play a key role in ensuring the delivery of high-quality software to a wide range of customers. You will work closely with the Product Manager, Quality Assurance Lead, and wider technical team to test new More ❯

Salesforce Software Tester – Salesforce Platform Application - Location: Fully remote or London Hybrid Salary: £35,000 - £40,000 We are working exclusively with a well-established not-for-profit technology provider who are looking to add a Software Tester to their Product Team. This organisation develops and delivers a specialist client-recording system built on the Salesforce platform, and they are … seeking a dedicated tester to ensure product quality and reliability as the solution continues to evolve. The Role As a Software Tester , you will play a key role in ensuring the delivery of high-quality software to a wide range of customers. You will work closely with the Product Manager, Quality Assurance Lead, and wider technical team to test new More ❯

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 services and More ❯

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 services and More ❯

Job Title: Senior Penetration Tester (Infrastructure Focus) Location: London (Hybrid/Flexible) Salary: Up to £80,000 + Bonus + Benefits Employment Type: Permanent Overview We are seeking an experienced Senior Penetration Tester with a strong background in infrastructure security testing to join a growing offensive security team. The ideal candidate will have deep technical expertise, the ability to lead More ❯

Data Tester – Retail Banking – Contract – £450/day (Inside IR35) Location: London (2 days/week onsite) Duration: 9 months Our client, a leading organisation in the retail banking sector , is seeking a Data Tester with strong SQL coding skills. You’ll be responsible for planning, scripting, and executing data/software testing in a fast-paced, multi-platform environment. More ❯

Data Tester – Retail Banking – Contract – £450/day (Inside IR35) Location: London (2 days/week onsite) Duration: 9 months Our client, a leading organisation in the retail banking sector , is seeking a Data Tester with strong SQL coding skills. You’ll be responsible for planning, scripting, and executing data/software testing in a fast-paced, multi-platform environment. More ❯

We’re hiring: Application Tester (iOS or Android) — Join a team that ships delightful user experiences Who we are We’re a fast-growing tech company building products that people love to use every day. We blend design, engineering, and data to turn complex problems into simple, magical experiences. If you’re excited about breaking things before users do and More ❯

We’re hiring: Application Tester (iOS or Android) — Join a team that ships delightful user experiences Who we are We’re a fast-growing tech company building products that people love to use every day. We blend design, engineering, and data to turn complex problems into simple, magical experiences. If you’re excited about breaking things before users do and More ❯

Walk Tester - UK (NEMO or TEMS) A Walk Tester is required for conducting in-field testing and data collection to evaluate the performance and coverage of wireless networks (e.g., 4G, 5G, DAS systems). This role involves following predefined test routes, operating technical equipment, and documenting results accurately for analysis and reporting. Key Responsibilities Execute Test Plans: Perform "walk tests More ❯

Manual Penetration Tester 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 apps and security products Deliver highly technical and effective security engagements through hands on systematic More ❯

Manual Penetration Tester 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 apps and security products Deliver highly technical and effective security engagements through hands on systematic More ❯

Manual Penetration Tester 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 apps and security products Deliver highly technical and effective security engagements through hands on systematic More ❯

Manual Penetration Tester 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 apps and security products Deliver highly technical and effective security engagements through hands on systematic More ❯

Manual Penetration Tester 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 apps and security products Deliver highly technical and effective security engagements through hands on systematic More ❯

Mid/Senior Penetration Tester - Remote - Up to £60k - New Role (REF46) 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 will have the following: Proven history in the delivery of penetration testing across web applications, mobile applications More ❯

Mid/Senior Penetration Tester - Remote - Up to £60k - New Role (REF46) 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 will have the following: Proven history in the delivery of penetration testing across web applications, mobile applications More ❯

Mid/Senior Penetration Tester - Remote - Up to £60k - New Role (REF46) 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 will have the following: Proven history in the delivery of penetration testing across web applications, mobile applications More ❯

Mid/Senior Penetration Tester - Remote - Up to £60k - New Role (REF46) 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 will have the following: Proven history in the delivery of penetration testing across web applications, mobile applications More ❯

Mid/Senior Penetration Tester - Remote - Up to £60k - New Role (REF46) 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 will have the following: Proven history in the delivery of penetration testing across web applications, mobile applications More ❯

Automation Tester Hybrid Working - UK Based 6 Month Contract Via Umbrella Lorien's leading banking client is looking for an experienced Automation Tester to join the existing team on an initial 6month contract. Required Skills: Automation Playwright API Automation Financial Services Experience If you find this opportunity intriguing and aligning with your skill set, we welcome the submission of your More ❯

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 More ❯

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 More ❯

Penetration Tester (OSCP) Location: Remote Position Type: Full-time Reports to: Senior Penetration Tester About the Organisation A high-growth security consultancy working across government, space programmes, and FTSE 100 organisations is expanding its offensive security function. The team delivers complex, high-impact testing and simulation work for clients across the UK, US, and Europe. With a strong learning culture … and a track record of delivering cutting-edge work, this is an opportunity to develop quickly in a technically challenging environment. Role Overview We’re looking for a Penetration Tester/Red Team Consultant with 1–3 years’ experience who thrives on variety, problem-solving, and continuous learning. You’ll deliver offensive security assessments, red team operations, and threat-led More ❯