Security Engineer – Europe

CloserHire; United Kingdom; Remote; GBP 55,000 - 72,000; Full time

Benefits offered by this job

Work From Home

Job summary

CloserHire seeks a hands-on Security Engineer focused on AppSec, GRC and AI security for a large-scale AI companionship platform. You will review code, drive remediation with developers, and coordinate pen tests and audits.

Independently own security end-to-end, maintain the risk register, monitor threats, and address AI-specific risks like prompt injections and jailbreaks. Remote Europe, B2B contractor.

Qualifications

• 2–3+ years of hands-on AppSec experience with vulnerability identification and remediation.
• Ability to perform or coordinate security audits and penetration tests.
• Experience in AI companies or scale-ups with 50+ employees is preferred.
• Strong engineering capabilities: Git/GitHub, Python or Bash, working with code.

Responsibilities

• Review code and drive vulnerability remediation with developers.
• Coordinate pen tests and security audits; maintain risk register.
• Monitor threats; manage device and access security; track AI-specific risks.

Skills

AppSec

GRC

Code Review

Python

Bash

Penetration Testing

Security Audits

Risk Register

Job description

€65,000 - €85,000 per year (gross) - plus Work From Home. Security Engineer (AppSec / GRC / AI Security) in Europe (remote).

What you'll actually take home

€65,000 - €85,000 per year (gross)

We put the figure in the advert on purpose. If it doesn't work for you, you should know that now rather than after three interviews.

The perks, in full

• Work From Home

The job itself

This is a hand-on, end-to-end security role as the company's only dedicated Security Engineer on a large-scale AI companionship platform. Day-to-day, the person will review code, drive vulnerability remediation with developers, coordinate pen tests and audits, maintain the risk register, monitor threats, manage device and access security, and track AI-specific risks such as prompt injection and jailbreaks.

Day to day that means this is a hand-on, end-to-end security role as the company's only dedicated Security Engineer on a large-scale AI companionship platform. Day-to-day, the person will review code, drive vulnerability remediation with developers, coordinate pen tests and audits, maintain the risk register, monitor threats, manage device and access security, and track AI-specific risks such as prompt injection and jailbreaks. It is a fully remote European B2B contractor position (€65k-€115k depending on level) that is technical and independent, not a compliance-only or advisory role. In short: Security Engineering + Application Security & Code Review + GRC & Risk Ownership + AI Platform Security (NSFW AI Companionship) Please see here all details + Screening Rules here.

What you need to bring

• Explicitly confirmed comfort with adult/NSFW content (probe in the screening call, as this is a stated deal-breaker)
• Based in Europe, approximately 80% CET overlap, occasional evening/weekend monitoring
• Able to own security independently without a large team, including GRC basics such as a risk register
• Experience conducting or coordinating security audits and penetration tests
• Experience in an AI company or a scale-up with 50+ employees
• Practical engineering capability: Git/GitHub plus Python/Bash or equivalent, working with code rather than just policy
• 2-3+ years of hand-on AppSec experience, having personally identified and resolved vulnerabilities, with demonstrable code review experience

Around five weeks from applying to your first day on the ground.

We are an equal-opportunity recruiter and consider every applicant on ability alone.