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Senior Application Security Engineer - Security Platform (Remote UK)

United Kingdom
Full Remote
This Job is No Longer Active This position is no longer accepting applications
AI Summary

This role focuses on enhancing application security by embedding with engineering teams for threat modeling and secure design reviews. Key responsibilities include owning SAST, DAST, and SCA tooling, hardening cloud-native infrastructure, and leading incident response. Requires 5+ years of AppSec experience, strong AWS security knowledge, and a hacker mindset.

Key Highlights
Enhance application security through threat modeling and secure design reviews.
Own and automate SAST, DAST, and SCA tooling.
Harden cloud-native stack including APIs, containers, IaC, and CI/CD pipelines.
Key Responsibilities
Threat modelling and secure design reviews embedded with engineering teams from day one.
Security code reviews and building the culture for engineers to do the same.
Owning SAST, DAST and SCA tooling - writing automation, not just running products.
Hardening APIs, containers, IaC and CI/CD pipelines across a cloud-native stack.
Penetration testing and vulnerability assessments across services and infrastructure.
Technical lead during incident response and red/blue exercises.
Building security tooling from scratch - production quality, not proof of concept.

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Technical Skills Required
Application Security AWS Security Security Tooling
Benefits & Perks
Salary: £90,000 - £130,000
Equity with upside
35 days annual leave + birthday off
Fully remote
Flexible hours
Pension up to 8% matched
Private Medical, dental, and optical
Paid sick leave, income protection, life insurance

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Nice to Have
CTFs, bug bounty, home labs

Job Description

Senior Application Security Engineer

Security Platform - Remote UK

£90,000 - £130,000 DOE + Equity

The problem worth solving

Most attacks don't start with someone breaking down the front door. They start with something that was already let in - a dependency, a package, a library that looked legitimate. The software your engineers are building right now is only as secure as everything it quietly pulls in from the outside world. That's a hard problem. AI is making it exponentially harder.

Regulators are paying attention. Enterprise security teams are scrambling. The companies building the infrastructure to get ahead of this are the ones that matter right now.

What the role involves

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Job Overview
Posted Aug 22, 2026
Employment Full-time
Experience Mid-Senior level
Location United Kingdom
Category Cyber Security
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