Lead Security Engineer

Company: Octopus Group

Location: London

Posted: March 17th, 2026

Overview

Octopus Energy started with a bold idea: to build Britain’s first truly digital energy supplier. By combining world-class tech with brilliant humans who care deeply about customers and driving the renewable energy transition, we became Britain’s largest energy supplier. We’re scaling fast and building the next generation of products to accelerate the green energy transition, from making it effortless to switch to heat pumps, solar and EVs, to launching smart tariffs and creating renewable generation at scale. We’re also enabling our global businesses to roll out learnings, products and experiences that customers love here worldwide.

At Octopus Tech, you’ll have real ownership, variety, and the chance to shape products that make a tangible difference in people’s lives – lowering bills, enabling greener living, and delivering experiences customers genuinely love. You’ll work side by side with teams across marketing, operations, and data, and see the impact of your work in the real world, fast.

We are expanding our Cyber and Information Security team at Octopus Energy. We are looking for an ambitious, knowledgeable, and experienced Lead Security Engineer to join our team, to grow with the rest of the company, and ensure we continue to do so in a secure and safe way.

You will be a key partner in defining what Security is at Octopus. We will be shaping this team to provide a world class support service to our employees, building our way out of problems with engineering firepower and undertaking transformational organisational change.

You’ll play a crucial role in helping to secure our software development processes, securing our platform services, integrating security practices, and shaping a culture of security. This is a creative, and collaborative position that is a full-time member of a Cloud-First organisation. If you’re passionate about Cloud technologies and driving security by design, we encourage you to apply!

Specifically, we are looking for a Lead Security Engineer with at least 5 years of relevant experience. You will lead a team of up to ~6 people and help shape the technical direction of the security engineering function. There will be time within the role for hands-on engineering work.

If this sounds exciting, we’d love to chat.

What you’ll do

What you’ll have

Previous experience working in engineering teams focused on one or more of the following areas

Ideally, you will have experience in one or more of the areas mentioned (or others), but we’re not expecting you to be an expert in all areas of security engineering!

What will help

Why else you\'ll love it here

We offer flexible hybrid working. Don’t let location discourage you from applying if you can’t make it to an office!

Got any burning questions before then? Drop us a message at talent@octoenergy.com and we’d love to help!

If this sounds like you then we'd love to hear from you.

Apply Now