Senior Cloud Security Engineer in London

You will design, implement, and maintain defensive security controls that protect our high‐availability, multi‐cloud payment systems built on modern technologies. Your deep understanding of current threats, exploitation methods, and risk trade‐offs will enable you to guide engineering teams on effective security features and ensure the right defensive measures are prioritised.

We're looking for:

• Essential:

• You live on the Linux command line.
• Your current research and experience back up your opinionated views on security practices and trade‐offs, which you love to openly debate and willingly share.
• You're sought after for your security engineering expertise, having built multiple security controls that are actively proven in large production estates.
• Your security expertise extends to at least one public cloud, including essential security features and long‐term security hardening practices.
• You appreciate building systems with good engineering practices and may have a background in software engineering at scale.
• You're open to being a part of our on‐call rota, ready to respond if we have a severe, platform‐impacting security tooling failure or need second‐line security incident response assistance.

• You have an interest in offensive security, potentially including participation in CTFs and past experience as a red team operator or pen tester.
• You've developed security configurations in multiple public and private clouds.
• You're a confident presenter and have accelerated appreciation of security across engineering teams.
• You regularly support building and analysis of threat models using a well-defined process.
• You have experience securing data centres and networking devices.
• You're terrified by supply chain and CI/CD security, but have good patterns for reducing the risks.
• Your engineering experiences match Form3's tech stack - including Golang and Terraform.

Tech Stack:

• AWS, GCP, Azure and private Data Centres.
• Kubernetes, Helm, Flux.
• Distributed systems, mostly Golang based with CockroachDB and NATSS.
• SIEM/SOAR, EDR, CNAPP, and a suite of open source tools with custom integrations.

The Team:

You will join a team of defensive security engineers directly maintaining and expanding security controls as well as advising the wider platform and application engineers within our R&D team. We report into the CISO and work alongside the other functional pillars of InfoSec.

Interview Process:

• Stage 1: Screening Call with Talent Team.
• Stage 2: Technical Interview - Building secure cloud architectures & team alignment.
• Stage 3: Technical Interview - Container and Linux Security, including a short pre‐interview research topic.

We always aim to stick to the above process; however, there may be occasions when an additional interview stage is needed for us to be sure we're hiring the right person!

Hiring Locations:

We are a remote-first organisation and are able to accept applications from the following countries: Germany, Netherlands, Spain, Portugal & UK.

About Form3:

Revolutionising the world of payments with our cutting‐edge technology and innovative solutions.

Our DEI&B Commitment:

We hire talented people from a variety of backgrounds and experiences and are committed to a work environment based on diversity, open‐mindedness and curiosity. We're united by our company values and we celebrate our unique differences.

Our employee lifecycle processes are designed to embrace equal opportunity and prevent discrimination against our people regardless of personal characteristics. It is our strong belief that the more inclusive and belonging we are as a business, the better our work will be.

As an inclusive employer, we guarantee to interview all neurodiverse and physically disabled applicants who meet the minimum criteria for this role. We also encourage candidates to notify us of any reasonable adjustments that may be required during the recruitment process.

If you consider yourself to be neurodiverse or physically disabled under the UN definition of disability and would like to be considered under this scheme and/or require any reasonable adjustments please let us know by sending an email to careers@form3.tech clearly stating your consent for us to process this data.

For more information please refer to our Recruitment Data Policy.