WRITER

Security engineer, application security (UK)

WRITER
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3 days ago
London, United KingdomMid Level

Responsibilities

  • Conduct threat modeling and secure architecture reviews with product and engineering teams.
  • Own and evolve the application security program, including SAST/DAST scanning, security code reviews, and vulnerability-prevention automation.
  • Establish secure coding standards, reusable security patterns, and libraries for engineering teams.
  • Design and recommend security features and products for customer environments.
  • Integrate AI agents into security and engineering workflows to proactively reduce risk.
  • Lead security assessments and penetration testing of applications, AI services, and APIs.
  • Design and implement controls for data pipelines, model training environments, and customer-facing AI agents.
  • Research emerging LLM and generative AI threats and develop defenses against novel attack vectors.

Requirements

  • 4+ years of hands-on application security engineering experience securing large-scale production systems.
  • Understanding of developer experience and workflows for shipping products while balancing security and engineering velocity.
  • 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, and enabling engineering teams.
  • Alignment with WRITER’s values of Connect, Challenge, and Own.

Benefits

  • Hybrid work from the London office.
  • Generous PTO and company holidays.
  • Comprehensive medical and dental insurance.
  • Paid parental leave for all parents for 16 weeks.
  • Fertility and family planning support.
  • Competitive pension scheme and company contribution.
  • Annual wellness, learning and development, and work-life stipends.
  • Company-wide and team off-sites.
  • Company stock options and competitive compensation.
WRITER

About WRITER

501-1,000 employees

WRITER builds an enterprise generative AI platform for creating, deploying, and supervising AI agents grounded in company data and powered by proprietary LLMs. It sells subscriptions and services to large organizations, with customers such as Accenture, Marriott, Uber, Mars, and Vanguard. Founded in 2020 and headquartered in San Francisco, the privately held company raised a Series C in 2024.

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