26 to 50 of 57 Offensive Security Jobs in London

join its permanent, fully remote team in the UK. This senior-level role focuses on building intelligent AI agents that can plan, reason, operate security tooling and identify exploitable vulnerabilities within controlled environments. Key Responsibilities: Design, build and deploy AI agents that automate penetration testing, including planning, tool … reasoning over security findings Develop sandboxed cyber-lab and range infrastructure using containers and Kubernetes Deliver AI features from initial design through to production, including evaluations, guardrails and monitoring Improve agent performance through prompt engineering, tool orchestration, evaluation and token and cost optimisation Integrate security tools and enable ...

Shape the future of cyber security. Protect what matters most. This is more than an architecture role. It's an opportunity to shape security strategy for major organisations, influence critical business decisions, and work at the forefront of cyber security innovation. If you're passionate about reducing risk … improving resilience, and delivering secure digital transformation at scale, we'd love to hear from you. Are you a seasoned Security Architect ready to influence enterprise-scale transformation? This is your chance to lead from the front, helping clients tackle complex cyber challenges while embedding security into ...

Cyber Security Consultant (Penetration Tester) Department: Cyber Employment Type: Permanent - Full Time Location: City, London Compensation: £45,000 - £55,000/year Description Moore Kingston Smith is seeking an experienced Cyber Security Consultant specialising in penetration testing to join our client-facing advisory team. You will join … NCSC-recognised cyber security team within our Risk Advisory practice, supporting a diverse portfolio of clients across multiple sectors. This is a hands‐on role focused on delivering penetration tests across web applications, APIs, and internal and external network infrastructure. You will also support Cyber Essentials Plus assessments ...

Staff/Senior Staff Security Engineer, Vinted Pay London, United Kingdom Vinted Marketplace Brief info about Vinted Our mission is to make second-hand the first choice, and we're looking for people who want to help us get there. Every day, we work together to help our members … grown with offices across Europe, supported by a team of over 2,000 people. Information about the position As Staff/Senior Staff Security Engineer in Vinted Pay, you will be the staff‐level security engineer inside our regulated payments business - and the person who makes Vinted ...

Client Server is seeking a Web Security Engineer to collaborate with the web development team and dominate offensive security across web-based applications. You will perform penetration testing, reverse engineering and vulnerability assessments, identifying risks and guiding developers to build secure, resilient software from the ground up. ...

technology protects governments, critical infrastructure and some of the world's largest enterprises against identity fraud, deepfakes and sophisticated cyber threats. As a Web Security Engineer you'll collaborate closely with the web development team to ensure security is at the centre of all web based applications. Joining … specialist security team, you'll focus on offensive web security, acting as the bridge between Security and Engineering. You'll perform penetration testing, reverse engineering and vulnerability assessments, identifying security risks and working closely with developers to build secure, resilient web applications from the ground ...

digital media platform that covers news and insights about digital assets, the underlying markets, policy, and blockchain technology. Reports to: CISO Americas At Bullish, security is not a checkpoint, it is the foundation of trust that lets people move billions across our markets with confidence. The Bullish Security … cutting-edge engineering and high-stakes finance, shaping how secure software is built across web, API, mobile, and FIX platforms, and pushing our security bar beyond industry-leading. This is a senior technical leadership role, a hands-on application and cloud security architect who leads through influence, deep ...

specialise in cloud migration and development, digital transformation including agile software development, DevOps, automation, data and machine learning... We’re hiring a Senior Offensive Security Analyst with deep expertise in API Security, OAuth, and web application penetration testing. The role will exclusively focus on identifying weaknesses … authentication and authorisation implementations across multiple teams, ensuring consistency and strong security practices within APIs and services. Please note: This role is fully remote and open to candidates located anywhere within the UK. Required Experience: Strong background in web application penetration testing Deep, hands‐on expertise in API Security ...

tough problems to keep the Internet moving forward, you’ll fit right in. Available Locations: Austin (US), London (UK) Role Summary As a Product Security Engineer, you will support security assessments and vulnerability operations for Cloudflare’s core software products. In this role, you will analyze system architecture … threat model new features, and ensure that product-related security findings are accurately triaged, routed to the correct engineering owners, and mitigated within our SLAs. On any given day, you might conduct a deep-dive security review on a new feature design, triage a complex bug bounty submission ...

products and infrastructure. Your primary responsibility will be to deal with privacy vulnerabilities by designing and guiding Software Engineers through remediations, learning from security/privacy incidents, and identifying vulnerabilities across our codebase at scale. Your skills will be the foundation of security initiatives that protect the security … connected by identifying and neutralizing threats that aim to collect sensitive information or disrupt our systems. 2+ years work experience in technical privacy, security, or security software engineering domains, including incident response, application privacy/security, and/or offensive security Experience identifying, analyzing ...

technology. Salary: Up to £45,000 per annum. Travel: Hybrid Location: London We're hiring a passionate Penetration Tester eager to grow in offensive security. Join a skilled, diverse team committed to innovation and technical excellence. This is a great opportunity to sharpen your expertise and contribute to impactful … cybersecurity initiatives. Support and contribute to Infrastructure and Cloud Security Assessments Be mentored and trained towards Adversarial Simulation, Red Team Operations, and other advanced offensive security techniques Write detailed, clear, and professional reports for technical and non-technical stakeholders Collaborate with a team of skilled professionals ...

fundamental bet is working. We have paying enterprise customers, real revenue and strong early demand for what we're building. We're building autonomous offensive-security agents that find and prove vulnerabilities in real customer environments. They're already uncovering critical vulnerabilities in systems built and operated … turns it into a world-class product and platform. As a Founding Software Engineer, you'll work across the stack to build the product security teams use every day — from polished, intuitive interfaces through to the APIs, data models and systems behind them. This isn't a role where ...

help shape Pen Test delivery and QA strategy, challenge approaches, and improve consistency of outcomes across vendors and stakeholder groups. An applicant from a security consulting firm or a financial services background will have a distinct advantage. Job Responsibilities The role’s responsibilities include Own vendor management for penetration … style risk/issue tracking) with the ability to produce crisp, executive-ready status reporting. Strong understanding of penetration testing delivery models and the offensive security space (not hands-on execution, but able to challenge, translate, and steer), including the ability to identify gaps in methodology, inconsistent severity ...

help shape Pen Test delivery and QA strategy, challenge approaches, and improve consistency of outcomes across vendors and stakeholder groups. An applicant from a security consulting firm or a financial services background will have a distinct advantage. Job Responsibilities The role's responsibilities include Own vendor management for penetration … style risk/issue tracking) with the ability to produce crisp, executive-ready status reporting. Strong understanding of penetration testing delivery models and the offensive security space (not hands-on execution, but able to challenge, translate, and steer), including the ability to identify gaps in methodology, inconsistent severity ...

with clients to scope objectives and threat scenarios, then plan and execute realistic operations within agreed rules of engagement. The role combines hands-on offensive security with research, problem solving and operational tradecraft. You'll build and manage red team infrastructure, develop custom tooling, research emerging TTPs … colleagues remotely but must be commutable to London every 2-3 weeks. About you: You have strong experience in a similar Red Team/Offensive Security role and keep up to date with emerging adversary tradecraft, tooling and TTPs relevant to red team operations You have advanced problem ...

WatchTowr Pte. Ltd. is looking for a candidate who thrives at the intersection of offensive security, AI, and experimentation. In this role, you will build innovative tooling that enhances security workflows while integrating directly into the watchTowr Platform, helping protect major enterprises from vulnerabilities. Your curiosity … high-energy mindset will be key in exploring advanced AI applications for security, working autonomously in a fast-paced, dynamic environment. Join a growing company and make significant contributions. #J-18808-Ljbffr ...

often treated as queue work: read the report, check the scope, set a severity, move it on. We are building this role differently. As Security Triage Analyst you own the first layer of judgement on every report that reaches Verda – what is real, what matters, what needs more evidence … report that looks routine elsewhere can matter more here because of tenant isolation, customer impact, or infrastructure access. You will work closely with Security, Engineering, Infrastructure, external triage partners, and researchers, and you will help improve how vulnerability handling works as the volume grows. Your responsibilities Review incoming reports ...

Continuous Threat Exposure Management (CTEM). The HackerOne Platform unites agentic AI solutions with the ingenuity of the world’s largest community of security researchers to continuously discover, validate, prioritize, and remediate exposures across code, cloud, and AI systems. Through solutions like bug bounty, vulnerability disclosure, agentic pentesting … teaming, and code security, HackerOne delivers measurable, continuous reduction of cyber risk for enterprises. Industry leaders, including Anthropic, Crypto.com, General Motors, Goldman Sachs, Lufthansa, Uber, UK Ministry of Defence, and the U.S. Department of Defense, trust HackerOne to safeguard their digital ecosystems. HackerOne was recognized in Gartner’s Emerging ...

Klarna seeks an experienced offensive mobile security specialist to protect its iOS and Android apps. You will conduct pentests and red-team exercises, reverse-engineer binaries, and apply MASVS/MASTG guidance to drive concrete engineering fixes. You will collaborate with software engineers to harden app security, test RASP protections, and document actionable remediation steps. This role requires hands-on testing across mobile platforms and a track record of security research or bug bounty work. #J-18808-Ljbffr ...

ReliaQuest, we do things differently. We do not limit your professional growth with outdated job titles and responsibilities. Why be just a “Security Analyst”, “Detection Developer”, or “Security Engineer” when you can be all three? As a GreyMatter Specialist, you will do all of that and more. This … this role, you’ll develop a diverse skill set which normally takes years to learn—all within your first year. Our industry-leading security operations platform, GreyMatter and immersive training will afford you the tools, experience, and opportunities to grow your career. Whether you’re conducting advanced investigations, troubleshooting ...

iProov provides science-based biometric solutions that enable the world’s most security-conscious organizations to streamline secure remote onboarding and authentication for digital and physical access. Our award-winning liveness technology and iSOC offer unmatched resilience against deepfakes and generative AI threats while ensuring effortless, scalable user experiences. … Trusted by leading governments and enterprises, including the U.S. Department of Homeland Security, U.K. Home Office, GovTech Singapore, ING, and UBS, iProov sets the standard in biometric identity assurance. This global trust is built not only on our technology but on the strength of the people behind it. ...

Design and extend the exploit-generation and validation pipeline behind Cyrion’s autonomous agent swarm. You will sit at the center of Cyrion’s offensive capability — the research that decides what our agents are able to find, chain, and prove. This is a hands-on exploit-development role embedded … customers and the validation pipeline. Publish internal writeups and contribute to the public research blog. What we're looking for 4+ years in offensive security — pentesting, red teaming, or vulnerability research. Comfortable reading and writing exploit code (Python, Go, or similar) against real targets. Deep knowledge ...

product helps security teams quickly and accurately detect intrusions in their cloud environment using canaries - decoys deployed to deceive attackers. Our research has already made an impact: We've disclosed vulnerabilities in Google's Gemini CLI We work with some of the world's leading security teams … need someone to expand and formalize our research function, turning findings into actionable insights and engaging content while helping Tracebit contribute to the wider security community. Who we're looking for 5+ years in offensive security or vulnerability research with deep focus on cloud platforms (AWS, Azure ...

leading cybersecurity firm in London is seeking a passionate Penetration Tester to enhance their offensive security team. You will support cloud and infrastructure security assessments, write detailed reports for various stakeholders, and collaborate with a diverse team. Candidates must hold an OSCP certification and have knowledge … application security, alongside excellent communication skills. This hybrid position offers great opportunities for professional growth in cybersecurity. #J-18808-Ljbffr ...

global financial services organisation seeks a Principal Cybersecurity Engineer to help build the next generation of data-driven security capabilities at exceptional scale. This is a senior (Director grade) individual contributor position. The role requires a candidate with deep cyber expertise and elite hands-on software engineering ability … still wants to spend around 40-50% of their time coding. You will work on complex security challenges across threat detection, anomaly identification, cyber automation and advanced analytics, turning vast volumes of security telemetry into practical protection. The ideal candidate may come from a security product vendor ...