🚀 Join WRITER: Secure the Future of Enterprise AI
WRITER is at the forefront of orchestrating AI-powered work for the world's leading enterprises. Our audacious vision is to expand human capacity through superintelligence, and we're achieving it with powerful, trustworthy AI that seamlessly unites IT and business teams for enterprise-wide transformation.
With WRITER's end-to-end platform, hundreds of global brands like Mars, Marriott, Uber, and Vanguard are building and deploying sophisticated AI agents, grounded in their proprietary data and fueled by WRITER's cutting-edge, enterprise-grade LLMs. Valued at $1.9B and backed by industry titans including Premji Invest, Radical Ventures, and ICONIQ Growth, WRITER is rapidly cementing its position as the undisputed leader in enterprise generative AI.
Founded in 2020 with thriving hubs in San Francisco, New York City, Austin, Chicago, and London, our team thinks big and moves fast. We're seeking smart, hardworking builders and scalers to join us in crafting a better future of work with AI.
🛡️ Your Mission: Security Engineer, Applications
This is where security meets groundbreaking AI innovation at an unprecedented enterprise scale. As a Security Engineer, Applications at WRITER, you won't just be building security foundations; you'll be architecting the very shield that protects the AI systems powering some of the world's most recognizable brands.
You'll thrive at the dynamic intersection of application security, AI infrastructure, and developer enablement—collaborating closely with engineering teams to embed security into every line of code, ensuring our platform remains both powerful and intrinsically trustworthy.
The opportunity before you is immense: you will help define how enterprise AI applications are secured. From pioneering threat modeling for our LLM architectures to building automated security controls that scale across our rapidly expanding platform, this role is about finding creative ways to say "yes, and here's how we do it securely." You'll tackle challenges most security engineers never encounter: securing AI agents, protecting sensitive training data pipelines, and designing controls for complex systems that didn't even exist a few years ago.
This hybrid role is based out of our San Francisco or New York City offices, reporting directly to the Head of Security Engineering.
💡 What You'll Do: Innovate & Secure
Architect security into the DNA of our AI platform by leading threat modeling sessions with product teams, designing secure architectures for new features, and ensuring security considerations shape product decisions from day one—not as an afterthought.
Lead and evolve our application security program, including establishing and maintaining SAST/DAST scanning in CI/CD pipelines, conducting security code reviews for critical changes, and building automation that proactively catches vulnerabilities before they reach production.
Partner with engineering teams to establish and champion secure coding standards, creating reusable security patterns and libraries that empower developers to build securely by default.
Drive the vision for how we protect and secure customer environments by designing and recommending innovative security features and products. You are the ultimate advocate for customer protection.
Pioneer the integration and leverage of AI agents to significantly increase velocity for both the security team and the broader engineering organization, ensuring we are proactive in minimizing risk while building products.
Execute comprehensive security assessments and penetration testing of WRITER's applications, AI services, and APIs, identifying vulnerabilities across our tech stack and collaboratively working with teams to remediate issues at scale.
Engineer robust security controls for protecting critical data pipelines, model training environments, and customer-facing AI agents.
Be the vanguard against emerging threats in the AI/ML security landscape, researching novel attack vectors specific to LLMs and generative AI, and proactively building defenses against these cutting-edge risks.
🎯 Who You Are & What You Bring
You're an experienced Application Security Engineer with a minimum of 4 years of hands-on experience, boasting a proven track record of securing large-scale production systems. Bonus points if you've thrived in fast-growing startups or high-growth environments.
You deeply understand developer experience and workflows, caring profoundly about reducing risk while preserving engineering velocity.
Proficient in at least two programming languages (Python, Java, Go, JavaScript/TypeScript), you possess the ability to read and review code across multiple languages, discerning both business logic and critical security implications.
You possess a comprehensive understanding of security tools and methodologies, including SAST/DAST solutions, vulnerability management platforms, security testing frameworks, and DevSecOps practices—you know which tools to leverage and when automation outperforms manual review.
An exceptional communicator, you translate complex security concepts into clear, actionable recommendations for both technical and non-technical audiences, inspiring teams to action.
You embody a builder's mindset, relentlessly seeking opportunities to automate, scale, and empower rather than create bottlenecks—you understand that security is an enabler, not a blocker, for the business.
You thrive in a culture that values Connect (building strong relationships across teams), Challenge (pushing the boundaries of what's possible in AI security), and Own (taking end-to-end responsibility for the security of our platform).
*This role is open to Mid, Sr. and Staff level candidates.
🍩 Benefits & Perks (US Full-time employees)
Generous PTO, plus company holidays Wellness stipend for gym, massage/chiropractor, personal training, etc. Company-wide off-sites and team off-sites WRITER is an equal-opportunity employer and is committed to diversity. We don't make hiring or employment decisions based on race, color, religion, creed, gender, national origin, age, disability, veteran status, marital status, pregnancy, sex, gender expression or identity, sexual orientation, citizenship, or any other basis protected by applicable local, state or federal law. Under the San Francisco Fair Chance Ordinance, we will consider for employment qualified applicants with arrest and conviction records.
Medical, dental, and vision coverage for you and your family
Paid parental leave for all parents (16 weeks)
Fertility and family planning support
Early-detection cancer testing through Galleri
Flexible spending account and dependent FSA options
Health savings account for eligible plans with company contribution
Annual work-life stipends for:
Learning and development stipend
Competitive compensation, company stock options and 401k
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