Security engineer, application security

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Security engineer, application security in UK new

WRITER
Full time
Email

UK
09/23/2026
Report

London

Responsibilities

Conduct threat-modeling sessions and design secure architectures with product and engineering teams.
Own the application security program, including SAST/DAST scanning, security code reviews, and vulnerability-detection automation.
Establish secure coding standards, reusable security patterns, and libraries for engineering teams.
Recommend security features and products for protecting customer environments.
Use AI agents to improve security-team and engineering-team velocity and proactive risk reduction.
Lead security assessments and penetration testing across applications, AI services, and APIs.
Design security controls for data pipelines, model-training environments, and customer-facing AI agents.
Research emerging LLM and generative-AI attack vectors and build defenses against novel risks.

Requirements

At least 4 years of hands-on application security engineering experience securing large-scale production systems.
Experience understanding developer workflows and balancing security risk with engineering velocity.
Technical expertise in at least two of Python, Java, Go, JavaScript, and TypeScript, with the ability to review code across multiple languages.
Knowledge of SAST/DAST solutions, vulnerability-management platforms, security-testing frameworks, and DevSecOps practices.
Strong communication skills for explaining security concepts to technical and non-technical audiences.
A builder-oriented approach focused on automation, scalability, and enabling engineering teams.
Alignment with WRITER’s values of Connect, Challenge, and Own.

Benefits

Hybrid work from WRITER’s London office for UK full-time employees.
Generous paid time off and company holidays.
Comprehensive medical and dental insurance.
Sixteen weeks of paid parental leave for all parents.
Fertility and family-planning support.
Early-detection cancer testing through Galleri.
Competitive pension scheme and company contribution.
Wellness, learning and development, and annual work-life stipends.
Company-wide and team off-sites.
Competitive compensation and company stock options.

Salary: Competitive

WRITER

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