architectures, and assist in incident response and other security investigations. Developing (or extending OSS) security automation tooling. This can range from detection tooling to security process automation, or a fuzzing infrastructure to find bugs. End-to-End Security Solutions: Architect, design, and implement security controls. Your work will directly impact our global user base. Automation Focus: Develop automated, scalable security … solutions. Efficiency is key. Tooling Expertise: Extend or create security automation tools. Detection, process automation, fuzzing-you'll own it. We are excited if you have Proficient Software Engineering experience. Programming/scripting skills: Go or Python Proven track record of deploying and operating Kubernetes and containers in production. Experience building, managing, and debugging CI/CD pipelines. Experience securely More ❯
Manchester, North West, United Kingdom Hybrid / WFH Options
Circle Group
engineering software and firmware to uncover security flaws Developing and demonstrating proof-of-concept exploits Analysing binary targets using tools like IDA Pro, Binary Ninja, or Ghidra Engaging in fuzzing, fault injection, symbolic execution, and virtualisation techniques Writing clean, efficient code in C/C++ and Python Collaborating in agile, low-ego research teams Required Experience Proven expertise in vulnerability … related field Desirable Existing security clearance (Secret or above) Knowledge of anti-reversing techniques, implants, and advanced threat emulation Proficiency in multiple architectures (e.g. x86, ARM) Background in penetration testing or red team work Package & Benefits Up to £135,000 base salary (or equivalent local currency) Health insurance, generous pension, bonus, and 25+ days holiday Fully remote - work from More ❯
Manchester, Lancashire, England, United Kingdom Hybrid / WFH Options
Circle Recruitment
engineering software and firmware to uncover security flaws Developing and demonstrating proof-of-concept exploits Analysing binary targets using tools like IDA Pro, Binary Ninja, or Ghidra Engaging in fuzzing, fault injection, symbolic execution, and virtualisation techniques Writing clean, efficient code in C/C++ and Python Collaborating in agile, low-ego research teams Required Experience Proven expertise in vulnerability … related field Desirable Existing security clearance (Secret or above) Knowledge of anti-reversing techniques, implants, and advanced threat emulation Proficiency in multiple architectures (e.g. x86, ARM) Background in penetration testing or red team work Package & Benefits Up to £135,000 base salary (or equivalent local currency) Health insurance, generous pension, bonus, and 25+ days holiday Fully remote - work from More ❯
Bristol, Avon, South West, United Kingdom Hybrid / WFH Options
Circle Group
engineering software and firmware to uncover security flaws Developing and demonstrating proof-of-concept exploits Analysing binary targets using tools like IDA Pro, Binary Ninja, or Ghidra Engaging in fuzzing, fault injection, symbolic execution, and virtualisation techniques Writing clean, efficient code in C/C++ and Python Collaborating in agile, low-ego research teams Required Experience Proven expertise in vulnerability … related field Desirable Existing security clearance (Secret or above) Knowledge of anti-reversing techniques, implants, and advanced threat emulation Proficiency in multiple architectures (e.g. x86, ARM) Background in penetration testing or red team work Package & Benefits Up to £135,000 base salary (or equivalent local currency) Health insurance, generous pension, bonus, and 25+ days holiday Fully remote - work from More ❯
with an automated and scalable approach (think webhooks and Docker) Developing and extending OSS security automation tooling. This can range from detection tooling to security process automation, or a fuzzing infrastructure to find bugs Architecting, designing, and implementing End-to-End Security solutions and controls. Your work will directly impact our global user base Focusing on Automation. Developing automated, scalable More ❯
Cambridge, Cambridgeshire, United Kingdom Hybrid / WFH Options
Arm Limited
Job Overview: As a Security Engineer - Fuzzing Specialist , you will own and evolve our coverage-guided fuzzing program. Your mission is to uncover hard-to-reach security flaws before attackers do, drive fixes to closure, and help product teams to embrace dynamic testing like fuzzing. You'll scout for new attack surfaces, craft high-performance fuzzing harnesses, and design … custom sanitisers that push the state of the art. Success means measurable coverage gains, actionable crash reports, and products that ship with provable resilience. Responsibilities: Map & prioritise fuzzing surfaces across services, libraries, APIs, and protocols; maintain a living risk-based roadmap. Design, build, and extend fuzzing harnesses (libFuzzer, AFL , Honggfuzz, etc.) that improve code-path exploration and minimise false positives. … techniques. Automate crash triage & root-cause analysis ; distinguish exploitable vulnerabilities from benign faults and drive CVE-level findings to remediation. Develop custom sanitisers to expose classes of bugs traditional fuzzing misses. Validate fixes & guard against regressions through differential fuzzing and regression corpora. Assess external disclosures (bug bounties, supply-chain advisories) to determine fuzzing detectability and refine harnesses when gaps are More ❯
assessment or penetration-testing techniques. What we are looking for Familiarity with a variety of tools (e.g. IDEs, debuggers, source control, Ghidra, FRIDA, Wireshark, VMs) and techniques (e.g. fuzzing, scripting, code injection). Intermediate to advanced understanding of computing principles (e.g. stack/heap distinction, compiled/interpreted languages). Proficiency with at least one programming language and the More ❯