WRITER
AI
Securityengineer,applicationsecurity
Neural analysis suggests this role is
optimal for Mid candidates.
“Security engineer, application security at WRITER. Skills: Application security engineering, Securing AI systems, Threat modeling LLM architectures, Building automated security controls, SAST/DAST scanning in CI/CD, Security code reviews, Secure coding standards, Security assessments and penetration testing, Designing security controls for AI/ML environments, Researching AI/ML security threats. Building security into the DNA of our AI platform. Conducting threat modeling sessions with product te”
What You'll Achieve.
Building the security foundations that protect the AI systems; Embedding security into every line of code; Ensuring our platform remains both powerful and trustworthy; Defining how enterprise AI applications are secured; Building automated security controls that scale; Increasing velocity for the security team and the overarching engineering org; Proactive in minimizing risk while we build products; Reducing risk while considering velocity of engineers; Enabling the business, not blocking it
Industry & Context.
Tackling challenges that most security engineers never encounter; Identifying vulnerabilities across our tech stack; Remediating issues at scale
This role is hybrid from our London office
What They're Looking For.
Must Have
4+ years of hands-on experience in application security engineering, Technical expertise in at least two programming languages (Python, Java, Go, JavaScript/TypeScript), Ability to read and review code across multiple languages, understanding both business logic and security implications, Knowledge of security tools and methodologies including SAST/DAST solutions, vulnerability management platforms, security testing frameworks, and DevSecOps practices, Excellent communication skills, A builder's mindset that looks for opportunities to automate, scale, and empower rather than create bottlenecks
Nice to Have
Worked in fast-growing startups or high-growth environments, Understanding of developer experience and developer workflows for shipping features and products
What You'll Do.
Building security into the DNA of our AI platform
Conducting threat modeling sessions with product teams
Designing secure architectures for new features
Ensuring security considerations shape product decisions
Owning and evolving the application security program
Establishing and maintaining SAST/DAST scanning in CI/CD pipelines
Conducting security code reviews for critical changes
Building automation that catches vulnerabilities before they reach production
Partnering with engineering teams to establish and champion secure coding standards
Creating reusable security patterns and libraries
Designing and recommending security features and products
Leading security assessments and penetration testing of WRITER's applications
Identifying vulnerabilities across our tech stack
Working collaboratively with teams to remediate issues at scale
Designing and implementing security controls for protecting data pipelines
model training environments
and customer-facing AI agents
Staying ahead of emerging threats in the AI/ML security landscape
Researching attack vectors specific to LLMs and generative AI
Proactively building defenses against novel risks
How You'll Work.
Team & Collaboration
Partnering with engineering teams; Conducting threat modeling sessions with product teams; Working collaboratively with teams to remediate issues at scale; Building relationships across teams
Communication Scope
Excellent communication skills that allow you to translate complex security concepts into clear recommendations for both technical and non-technical audiences; Explain why something matters and motivate teams to action
Full Job Description
🚀 ABOUT WRITER WRITER is where the world's leading enterprises orchestrate AI-powered work. Our vision is to expand human capacity through superintelligence. And we're proving it's possible – through powerful, trustworthy AI that unites IT and business teams together to unlock enterprise-wide transformation. With WRITER's end-to-end platform, hundreds of companies like Mars, Marriott, Uber, and Vanguard are building and deploying AI agents that are grounded in their company's data and fueled by WRITER's enterprise-grade LLMs. Valued at $1.9B and backed by industry-leading investors including Premji Invest, Radical Ventures, and ICONIQ Growth, WRITER is rapidly cementing its position as the leader in enterprise generative AI. Founded in 2020 with office hubs in San Francisco, New York City, Austin, Chicago, and London, our team thinks big and moves fast, and we're looking for smart, hardworking builders and scalers to join us on our journey to create a better future of work with AI. 📐 ABOUT THE ROLE This is where security meets innovation at enterprise scale. As a security engineer, applications at WRITER, you'll be building the security foundations that protect the AI systems powering some of the world's most recognizable brands. You'll work at the intersection of application security, AI infrastructure, and developer enablement—partnering with engineering teams to embed security into every line of code while ensuring our platform remains both powerful and trustworthy. The opportunity is massive: you'll help define how enterprise AI applications are secured, from threat modeling our LLM architectures to building automated security controls that scale across our growing platform. This isn't about saying "no"—it's about finding creative ways to say "yes, and here's how we do it securely." You'll tackle challenges that most security engineers never encounter: securing AI agents, protecting training data pipelines, and designing controls for systems that didn't exist
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