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Security engineer, application security

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Security engineer, application security in UK

  • London

Responsibilities

  • Conduct threat modeling with product teams and design secure architectures for new features.
  • Own and evolve the application security program, including SAST/DAST scanning in CI/CD pipelines, security code reviews, and automated vulnerability detection.
  • Establish secure coding standards and create reusable security patterns and libraries for engineering teams.
  • Design and recommend security features and products for protecting customer environments.
  • Integrate AI agents to increase security-team and engineering velocity while reducing risk.
  • Lead security assessments and penetration testing of applications, AI services, and APIs, and coordinate vulnerability remediation.
  • Design and implement 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.
  • Understanding of developer experience and workflows for shipping features while reducing security risk.
  • 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’s mindset focused on automation, scalability, developer enablement, and business-enabling security.
  • Alignment with WRITER’s Connect, Challenge, and Own values.

Benefits

  • Hybrid work from WRITER’s London office.
  • 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

WRITER delivers compelling, high‑quality content that drives engagement and amplifies brand voices across digital platforms. Our team blends strategic insight with creative storytelling to craft copy that resonates, converts, and stands out in a crowded marketplace. By partnering closely with cli...

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