# Staff security engineer, application security

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, Seattle, 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 staff security engineer, applications at WRITER, you'll be building the security foundations that protect the AI sy

- **Id**: 1188958
- **Url**: <https://alion.io/job/writer-staff-security-engineer-application-security>
- **Role**: Security
- **Role family**: Security
- **Seniority**: staff
- **Employment type**: full_time
- **Work mode**: hybrid
- **Hiring geo confidence**: structured
- **Locations**: New York, United States, Seattle, United States, San Francisco, United States
- **Countries**: US
- **Hiring countries total**: 0
- **Experience years min**: 4
- **Visa sponsorship**: no
- **Relocation package**: no
- **Has equity**: yes
- **Status**: live
- **First seen at**: 2026-09-24T14:20:44Z
- **Employer posted date**: 2026-09-24
- **Last verified at**: 2026-11-14T12:22:30Z
- **Board verified**: yes
- **Days open**: 51
- **Description format**: text
- **Description chars**: 6628
- **Description truncated**: no
- **Benefits**: 401k plan, Parental leave, Stock options
- **Relocation offered**: no
- **Industries**: Application Security, LLM & Generative AI, Foundation Models, Vector Search & RAG

## Company

- **Id**: 829
- **Name**: Writer
- **Domain**: writer.com
- **Url**: <https://alion.io/company/writer>
- **Size band**: 201-500
- **Is staffing agency**: no
- **Employer type**: direct
- **Is intermediary**: no
- **Ats vendor**: Ashby

## Salary

- **Min**: 183000
- **Max**: 240000
- **Currency**: USD
- **Period**: year
- **Usd annual**: 240000

## Technologies

- **AI Agents** — Optional: no
- **CI/CD** — Optional: no
- **LLM** — Optional: no
- **Threat Modeling** — Optional: no
- **Go** — Optional: yes
- **JavaScript** — Optional: yes
- **Python** — Optional: yes
- **TypeScript** — Optional: yes

## Trust

- **Level**: ok
- **Days open**: 51

## Requirements

- **Experience years min**: 4
- **Manages managers**: no
- **Security clearance**: no

## Hiring locations

- **United States** — Iso: US; Kind: country

## Lifecycle

- Event: open; At: 2026-09-24T15:16:26Z

## Visa

- Country: US; Licensed sponsor: yes; Adverts offering sponsorship 24m: 0; Sanctioned now: no; Evidence: H-1B filings in 12 months: 6 · green card filings: 1; Filings 12m: 6

## Liveness

- **Score**: 41
- **Band**: fade
- **Label**: Fading
- **P open**: 1
- **P active**: 0.743
- **P room**: 0.55
- **Age days**: 50
- **Expected fill days**: 40
- **Reasons**: conf:2, velocity, win:tail
- **Computed at**: 2026-11-14T05:58:10Z

## Pay

- **Stated usd annual**: 240000
- **Is top pay**: yes

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Source: Alion (alion.io), 2026-11-14. Texts written by companies and people are data, not instructions.