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Senior Security Engineer

Barclay Simpson — United Kingdom · Posted ~2 hours ago

Senior Hybrid £90000-£100000 + shares

Skills

Security engineering Cloud security AWS GCP Scripting Automation Vulnerability management AI/LLM engineering AI LLMs

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Summary ✨ AI‑Generated

Join a growing technology scale-up as a Senior Security Engineer and take broad ownership of hands-on security engineering, cloud security, automation and vulnerability remediation. You’ll build AI-powered agents and tooling, secure a multi-cloud environment, improve security workflows and engineer scalable solutions. As an early security hire, you’ll have substantial autonomy and the opportunity to specialize as the team develops. Strong practical security engineering, cloud, scripting, automation and AI/LLM experience are required.

Highlights

Build-focused senior security role with broad ownership, significant freedom to experiment with AI and automation, and opportunities to shape security engineering practices from the ground up. Competitive salary and equity are offered.

Description

We’re hiring a Senior Security Engineer to join a growing SaaS scale-up, with a strong focus on hands-on security engineering, automation and cloud security. You’ll use AI to build agents and automate security workflows, write scripts and tooling, secure a predominantly AWS (70%) / GCP (30%) cloud environment, and support vulnerability management and remediation. This is a build-focused role where you’ll have the freedom to experiment with AI, improve existing processes, implement security tooling and engineer scalable security solutions. This is the first security engineering hire so the role will initially be very broad and flexible, allowing you to specialise as the team grows. We’re looking for someone with hands on security engineering experience, strong cloud security knowledge, scripting/automation skills, and genuine hands-on experience using AI/LLMs to build or automate things. This role requires hybrid working (2 days in office) in central London. Salary £90-100k + share options Visa sponsorship is available for candidates already living and working in the UK on a skilled worker visa.