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, Securing AI agents, Protecting training data pipelines, Designing controls for AI systems. Build security into the DNA of our AI platform. Conduct threat modeling sessions with product teams”
Industry & Context.
Tackle challenges that most security engineers never encounter; Identifying vulnerabilities across our tech stack; Remediate issues at scale
What They're Looking For.
Must Have
Minimum 4 years of hands-on experience in application security engineering, Proven track record of securing large-scale production systems, 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
Nice to Have
Worked in fast-growing startups or high-growth environments, Experience with AI agents to help increase velocity for the security team and the overarching engineering org, Researching attack vectors specific to LLMs and generative AI, Proactively building defenses against novel risks
What You'll Do.
Build security into the DNA of our AI platform
Conduct threat modeling sessions with product teams
Design secure architectures for new features
Ensure security considerations shape product decisions
Own and evolve our application security program
Establish and maintain SAST/DAST scanning in CI/CD pipelines
Conduct security code reviews for critical changes
Build automation that catches vulnerabilities before they reach production
Partner with engineering teams to establish and champion secure coding standards
Create reusable security patterns and libraries
Design and recommend security features and products
Integrate and leverage AI agents to help increase velocity for the security team and the overarching engineering org
Lead security assessments and penetration testing of WRITER's applications
Identify vulnerabilities across our tech stack
Work collaboratively with teams to remediate issues at scale
Design and implement security controls for protecting data pipelines
model training environments
and customer-facing AI agents
Stay ahead of emerging threats in the AI/ML security landscape
Research attack vectors specific to LLMs and generative AI
Proactively build defenses against novel risks
How You'll Work.
Team & Collaboration
Partnering with engineering teams to embed security into every line of code; Conducting threat modeling sessions with product teams; Working collaboratively with teams to remediate issues at scale; Building relationships across teams
Communication Scope
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
Applying for this Security engineer, application security role?
Most applicants get filtered before a human reads their resume. See if yours makes the cut.
How to Apply on Ashby
- Ashby is a fast modern ATS — most applications take under 3 minutes.
- The resume parser is strong; verify parsed experience dates and job titles.
- Custom screening questions are often scored algorithmically — answer completely.
- Location field affects geo-based screening; use your actual metro area.
ANONYMOUS · UNFILTERED
What do employees actually say about WRITER?
Real rants from real employees. Read before you apply.