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Security engineer, application security

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Security engineer, application security in USA

  • Seattle, WA

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 vulnerability-detection automation.
  • Establish secure coding standards and create reusable security patterns and libraries for engineering teams.
  • Design security features and products that protect customer environments.
  • Integrate AI agents to increase security-team and engineering-organization velocity and proactively minimize risk.
  • Lead security assessments and penetration testing of applications, AI services, and APIs, and collaborate on remediation.
  • Design and implement controls for data pipelines, model-training environments, and customer-facing AI agents.
  • Research emerging AI/ML and LLM security threats 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 products 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-aligned security.
  • Alignment with WRITER’s Connect, Challenge, and Own values.
  • The role is open to mid, senior, and staff-level candidates.

Benefits

  • Hybrid work from the New York City, San Francisco, or Seattle offices.
  • Generous paid time off and company holidays.
  • Medical, dental, and vision coverage for employees and families.
  • Sixteen weeks of paid parental leave for all parents.
  • Fertility and family-planning support.
  • Early-detection cancer testing through Galleri.
  • Flexible spending and dependent-care FSA options.
  • Health savings account with company contribution for eligible plans.
  • Annual wellness and learning-and-development stipends.
  • Company-wide and team off-sites.
  • Company stock options and 401(k).

Salary: $132k - $258k/yr

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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