iOS Software Engineer (Security)

Added 11/09/2026

We are seeking an iOS Software Engineer (Security) to help design, build and protect high-quality mobile applications used by a broad range of customers. In this role, you will work at the intersection of software engineering and mobile security, contributing to secure product development from initial design through release and ongoing improvement. You will collaborate with iOS engineers, product managers, security specialists and platform teams to ensure that security is embedded throughout the development lifecycle. Your responsibilities will include developing and maintaining robust iOS applications using Swift and relevant Apple frameworks; reviewing code and technical designs for security and reliability;...

End User Technology Compliance & Security Lead

Added 04/09/2026

We are seeking an End User Technology Compliance & Security Lead to strengthen the governance, security and compliance of workplace technology services. This role will provide strategic and operational leadership across end-user computing, including laptops, desktops, mobile devices, collaboration tools, identity-related controls and supporting platforms. You will ensure that technology services are secure, resilient and aligned with internal policies, regulatory obligations and recognised industry standards. Key responsibilities include developing and maintaining the end-user technology security and compliance framework; identifying risks and defining appropriate controls; coordinating vulnerability, patch and configuration management; and overseeing endpoint protection, encryption, device lifecycle and access management...

DevSecOps Engineer Information Technology & Services Sheffield, England, United Kingdom Be an early applicant 12 hours ago

Added 04/08/2026

We are seeking a skilled DevSecOps Engineer to join our dynamic team in Sheffield, England. The ideal candidate will be responsible for integrating security practices into the DevOps process, ensuring that the software development lifecycle is secure from design through deployment. You will collaborate closely with development and operations teams to implement automated security testing, manage vulnerabilities, and ensure compliance with industry standards and best practices. The role also involves creating and maintaining CI/CD pipelines, deploying infrastructure as code, and monitoring system performance for security risks. Key responsibilities include conducting security assessments of applications and systems, providing recommendations for improvement,...

Penetration Tester RECengineering Ltd Sunderland, England, United Kingdom Be an early applicant 10 hours ago

Added 29/07/2026

We are seeking a skilled Penetration Tester to join our dynamic team in Sunderland, England. In this role, you will be responsible for conducting comprehensive security assessments on applications, networks, and systems to identify vulnerabilities and ensure robust protection against potential threats. You will utilize various testing methodologies and tools to simulate attacks, assess security postures, and provide actionable insights to enhance our cybersecurity measures. Your responsibilities will include developing and executing penetration tests, crafting detailed reports outlining findings and recommendations, and collaborating with cross-functional teams to remediate vulnerabilities. You will stay updated on the latest security trends, threat landscapes,...

Founding Security Researcher

Added 11/09/2026

We are seeking a Founding Security Researcher to establish and lead the security research function from the ground up. This is a highly influential role for an experienced security professional who enjoys investigating emerging threats, translating technical findings into practical defensive strategies, and shaping the direction of a growing security programme. You will work closely with engineering, product, infrastructure, and leadership teams to identify risks, strengthen security controls, and build a culture of security by design. Your responsibilities will include conducting in-depth research into vulnerabilities, attack techniques, malware, exploitation methods, and relevant developments across the threat landscape. You will design...

AI Security Researcher/Research Engineer

Added 08/09/2026

We are seeking an AI Security Researcher/Research Engineer to investigate emerging threats, vulnerabilities, and defensive techniques across artificial intelligence and machine learning systems. You will help assess the security, reliability, and resilience of models, data pipelines, agents, and supporting infrastructure, translating research findings into practical improvements. This role is suited to someone who enjoys working across theoretical research, hands-on experimentation, and engineering implementation in a fast-changing technical environment. Your responsibilities will include designing and executing evaluations of model behaviour, adversarial robustness, privacy, data poisoning, prompt injection, model extraction, misuse, and other relevant attack or failure modes. You will develop proof-of-concept...

Founding AI Security Engineer / Researcher at Refractal

Added 01/09/2026

We are seeking a Founding AI Security Engineer / Researcher to define and build the security foundations for advanced artificial intelligence systems. This is an early, high-impact role for someone who is comfortable working across research, engineering, and product development. You will investigate emerging threats affecting machine learning models, AI agents, data pipelines, and deployment infrastructure, translating your findings into practical safeguards and scalable security capabilities. Your responsibilities will include designing threat models for AI systems; identifying vulnerabilities such as prompt injection, data poisoning, model extraction, insecure tool use, and adversarial manipulation; and developing methods to evaluate model and application...

Junior Cyber Security Researcher - September 2027

Added 26/08/2026

We are seeking a Junior Cyber Security Researcher to join a forward-looking security team from September 2027. This entry-level role is suited to someone with a strong interest in cyber security, threat research and emerging technologies, who is keen to develop practical experience in a collaborative environment. You will support investigations into new and evolving threats, contribute to security research projects and help translate technical findings into clear, actionable intelligence. Your responsibilities will include monitoring threat activity, researching vulnerabilities, malware, attack techniques and relevant security trends, and assisting with the assessment of potential risks. You will help gather, validate and...

Security Researcher

Added 19/08/2026

We are seeking a talented and motivated Security Researcher to join our dynamic team. In this role, you will be responsible for identifying, analyzing, and mitigating security vulnerabilities across various platforms and systems. You will conduct in-depth research on emerging threats and trends in cybersecurity, providing valuable insights to enhance our security posture. Your expertise will play a crucial role in developing effective security strategies and solutions that protect our digital assets and ensure compliance with industry standards. The ideal candidate will have a solid understanding of security protocols and technologies, along with hands-on experience in vulnerability assessment, penetration testing,...

AI Security Researcher

Added 18/08/2026

We are seeking a talented AI Security Researcher to join our dynamic team, focused on advancing the security of artificial intelligence systems. The ideal candidate will be responsible for conducting in-depth research on AI vulnerabilities, developing innovative security protocols, and implementing effective mitigation strategies. You will work collaboratively with cross-functional teams to identify potential threats and enhance the resilience of AI applications against adversarial attacks. Your contributions will play a vital role in safeguarding sensitive data and maintaining the integrity of AI technologies. Key responsibilities include analyzing current AI security landscapes, designing and executing experiments to assess the robustness of...

Cyber Security Researcher

Added 27/07/2026

We are seeking a skilled Cyber Security Researcher to join our dynamic team. In this role, you will be responsible for conducting in-depth research on emerging cyber threats, vulnerabilities, and security solutions. You will analyze security incidents, develop threat models, and contribute to the design of effective security measures. Your expertise will help to inform the development of innovative security technologies and protocols, ensuring they are robust against potential attacks. Collaborating with cross-functional teams, you will also prepare comprehensive reports and present findings to stakeholders, enhancing awareness and understanding of cyber risks within the organization. The ideal candidate will possess...

Cybersecurity Tester/Researcher

Added 17/09/2026

We are seeking a Cybersecurity Tester/Researcher to assess the security of applications, infrastructure, networks, and emerging technologies. The successful candidate will plan and conduct penetration tests, vulnerability assessments, security reviews, and controlled attack simulations across web, mobile, cloud, API, and enterprise environments. You will identify weaknesses, validate their impact, and provide clear, evidence-based recommendations that help strengthen security controls and reduce operational risk. Responsibilities include defining test scope and methodologies, performing manual and automated security testing, researching new vulnerabilities and attack techniques, developing proof-of-concept exploits where appropriate, and analysing security events or suspected compromises. You will document findings in detailed...

Vulnerability Researcher

Added 17/09/2026

We are seeking a Vulnerability Researcher to identify, analyse, and responsibly disclose security weaknesses across software, hardware, embedded systems, and networked environments. You will conduct independent and collaborative research into emerging attack techniques, develop proof-of-concept exploits, and assess the practical impact of vulnerabilities. The role will involve reverse engineering binaries, analysing source code, debugging applications, fuzzing interfaces and protocols, and investigating vulnerabilities in complex technical systems. You will be responsible for creating reliable, reproducible demonstrations of security issues and documenting your findings for both technical and non-technical audiences. Working with engineering, security, and product teams, you will help validate remediation...

Cybersecurity Tester/Researcher

Added 17/09/2026

We are seeking a Cybersecurity Tester/Researcher to assess the security of applications, infrastructure, networks and emerging technologies. The successful candidate will plan and execute authorised security assessments, identify vulnerabilities, validate their impact and communicate practical recommendations to improve resilience. This role will involve a combination of hands-on testing, technical research and collaboration with engineering, operations and risk teams. Responsibilities include conducting penetration tests, vulnerability assessments, security reviews and targeted research across web applications, APIs, mobile platforms, cloud environments, operating systems and networks. You will develop test plans and tooling, perform reconnaissance and exploitation within approved boundaries, analyse findings, and produce...

Senior Cybersecurity Tester/Researcher

Added 17/09/2026

We are seeking a Senior Cybersecurity Tester/Researcher to lead advanced security assessments, identify emerging threats, and strengthen the resilience of complex technology environments. In this role, you will plan and execute penetration tests, red team exercises, vulnerability assessments, and adversary simulations across networks, applications, cloud platforms, APIs, endpoints, and infrastructure. You will assess security controls, investigate weaknesses, validate exploitability, and clearly communicate technical findings to both specialist and non-specialist audiences. Key responsibilities include developing testing methodologies and rules of engagement, conducting manual and automated security testing, researching new attack techniques, and creating proof-of-concept exploits where appropriate. You will analyse attack...