Senior Product Engineer (security)

£100,000–£140,000+ | Permanent | London | AI

One of London’s fastest-growing AI companies is looking for a Senior Software Security Engineer to help build security directly into its product and engineering environment.

This isn’t a traditional InfoSec position. They’re looking for a strong Software Engineer who understands security - someone comfortable getting directly into the codebase, building tooling and fixing vulnerabilities rather than simply identifying or reporting them.

The role

You’ll work closely with Software and Infrastructure Engineers across areas including:

Product and application security
Identifying and remediating vulnerabilities directly in the codebase
Building internal security tooling and automation
Cloud and infrastructure security
Secure software development practices
Improving security across CI/CD and engineering workflows
Helping shape security architecture as the company scales

What they’re looking for

The ideal profile will have:

Strong commercial Software Engineering experience
Experience with TypeScript / JavaScript and Node.js
Strong understanding of application and product security
Experience working with AWS / cloud infrastructure
Ability to investigate vulnerabilities and implement the fixes yourself
Experience working within modern, high-quality engineering environments

You do not need to have spent your entire career in Security. Strong Backend or Product Engineers who have meaningful security knowledge and want to specialise further are

encouraged to apply.

Key details

£100k–£140k+, with scope higher for exceptional / Principal-level profiles
Permanent
High-growth, heavily funded AI company
London-based, office-first with some flexibility
Sponsorship can be considered
Two-stage interview process

This is an opportunity to join a high-calibre engineering environment where security is being treated as an engineering problem - with genuine ownership over how it is built into the product as the company scales.