Application Security Engineer JavaScript

Salary: £80,000 - 80,000 per year

Requirements

• We have strong experience in web application security and offensive security testing.
• We have hands-on expertise in penetration testing and reverse engineering.
• We have a deep understanding of modern web security vulnerabilities and mitigation techniques.
• We have commercial JavaScript experience, with TypeScript knowledge highly desirable.
• We are comfortable writing and reviewing production code, not just identifying vulnerabilities.
• We are collaborative and pragmatic, and able to work closely with engineering teams.

Responsibilities

• We collaborate closely with the web development team to ensure security is at the centre of all web-based applications.
• We join a specialist security team and focus on offensive web security.
• We act as the bridge between Security and Engineering.
• We perform penetration testing, reverse engineering and vulnerability assessments.
• We identify security risks and work closely with developers to build secure, resilient web applications from the ground up.
• We provide expert guidance on secure coding practices.
• We influence architecture and design decisions.
• We help embed security throughout the software development lifecycle.

Technologies

• AI
• Computer Vision
• JavaScript
• Security
• TypeScript
• Web

More

We are a global leader in Computer Vision, AI and biometric identity, and our technology protects governments, critical infrastructure and some of the worlds largest enterprises against identity fraud, deepfakes and sophisticated cyber threats. This is a highly collaborative role based in London with remote working, where we meet up in the London office approximately twice a month for innovation sessions and team meetings. We offer a salary of up to £80k, plus bonus, equity and excellent career progression.

last updated 35 week of 2026