Senior Offensive Security Engineer

🚀 We’re on a mission to make money work for everyone.

We’re waving goodbye to the complicated and confusing ways of traditional banking.

After starting as a prepaid card, our product offering has grown a lot in the last 10 years in the UK. As well as personal and business bank accounts, we offer joint accounts, accounts for 16-17 year olds, a free kids account and credit cards in the UK, with more exciting things to come beyond. Our UK customers can also save, invest and combine their pensions with us.

With our hot coral cards and get-paid-early feature, combined with financial education on social media and our award winning customer service, we have a long history of creating magical moments for our customers!

We’re not about selling products - we want to solve problems and change lives through Monzo ❤️

📍 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