You9ll own application security at a company where the app layer is the highest-priority security surface. This is not a scan-and-triage role. You9ll embed in the development lifecycle, review code for exploitable flaws, build security tooling into CI/CD, and drive vulnerability remediation across a platform serving 300K+ experts and enterprise clients processing sensitive AI training data. We use AI heavily in our own security work. You should be comfortable building alongside AI code-gen tools, using LLMs to accelerate code review and threat modeling, and automating away the repetitive work that slows AppSec programs down. If you9d rather write a CodeQL query than file a Jira ticket, you9ll fit in here. We9re in-person five days a week at our SF headquarters, with first Fridays remote. What You9ll Build: Security review workflows embedded in the SDLC - PR-level analysis that catches auth bugs, injection flaws, and business logic errors before they ship SAST/DAST pipelines integrated into CI/CD - shifting security left without slowing down deploys Vulnerability management processes that prioritize by real exploitability, not CVSS score Secure coding standards and guardrails that make the safe path the easy path for 50+ engineers Threat models for new features and architecture changes - especially around AI data pipelines, payment flows, and multi-tenant boundaries Bug bounty program operations - triaging HackerOne reports, validating findings, and driving fixes to closure What We9re Looking For You9ve found and fixed real vulnerabilities in production applications - not just run scanners Deep understanding of web application security: OWASP Top 10 is baseline, you think in terms of attack chains and business logic flaws Strong in at least one of Python, TypeScript, or Go - you can read a PR and spot the auth bypass Experience building or tuning SAST/DAST tooling (Semgrep, CodeQL, Snyk, Burp, or similar) You understand modern web frameworks, APIs, and authentication patterns well enough to threat model them Experience managing a vulnerability pipeline - from discovery through prioritization to verified remediation 5+ years of professional experience in application security, security engineering, or software engineering with a strong security focus Bonus Points Experience running or triaging a bug bounty program (HackerOne, Bugcrowd) Offensive security skills - you9ve done penetration testing and can think like an attacker Experience securing AI/ML applications - model serving APIs, training data pipelines, prompt injection defense Familiarity with supply chain security - dependency scanning, registry firewalls (Socket, Snyk) You9ve built custom security tooling that a team still uses Contributions to open source security projects or published vulnerability research Benefits Bi-annual performance bonus structure Generous equity grant vested over 4 years Up to $15k Relocation bonus $10K housing bonus (if you live within 0.5 miles of our office) $1.5K monthly stipend for meals Free Equinox membership $200 monthly laundry reimbursement $200 monthly personal wellness reimbursement Health, Dental, Vision insurance