Senior Offensive Security Engineer

• You have a strong attacker mindset and are naturally curious about how systems can be broken
• You've got hands on experience in offensive security across areas like web, mobile, cloud, or infrastructure
• You're comfortable working across modern tech stacks (e.g. Kubernetes, AWS/GCP, microservices) or excited to learn
• You can take ownership of ambiguous problems and drive them through to impactful outcomes
• You enjoy collaborating with others and influencing teams to think more securely
• You're experienced in security testing and/or have relevant certifications (e.g. OSCP, CREST)

?? £76,500 - £90,000?Incentive awards tied to your performance ??This role can be based in our London office, but we're open to distributed working within the UK (with ad hoc meetings in London) ? We offer flexible working hours and trust you to work enough hours to do your job well, and at times that suit you and your team. ?? £1,000 learning budget each year to use on books, training courses and conferences. ?? We will set you up to work from home; all employees are given Macbooks and for fully remote workers we will provide extra support for your work-from-home setup. ? Plus lots more! Read our full list of benefits.

?? London/Cardiff/UK Remote | ??£76,500 - £90,000 + Incentive awards tied to your performance + Benefits ? Our Offensive Security team? You'll be joining Monzo's Offensive Security team, part of our wider Security collective. We're a team of curious, hands on security professionals who think like attackers to help keep Monzo and our customers safe. We work across everything from customer facing products and mobile apps to cloud infrastructure, internal systems, and emerging technologies like AI. Our role is to find weaknesses before others do. Through security testing, red and purple teaming, and adversarial research, we uncover vulnerabilities, demonstrate real-world impact, and help teams build more secure systems. We work closely with engineers and security partners across Monzo, bringing an attacker mindset into the room and helping shape security decisions through collaboration, curiosity, and practical expertise. ?? You'll play a key role by... * Leading offensive security projects from initial idea through to execution and reporting * Simulating real world attacks to uncover vulnerabilities across our systems, infrastructure, and products * Partnering with engineering and security teams to improve detection, response, and resilience * Bringing an attacker mindset into conversations - asking "what if?" and challenging assumptions * Producing proof-of-concept exploits to clearly demonstrate risk and drive meaningful fixes * Mentoring others in the team and acting as a highly independent technical lead on complex engagements