Security Engineer · San Francisco
Security Engineer Jobs in San Francisco
There are currently 78 open Security Engineer jobs in San Francisco & Bay Area across 46 AI startups. 24% of these roles are at Series A–B startups. Every listing links straight to the company's official application page.
78Open roles
46Companies hiring
Jun 16, 2026Last updated
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Funding-stage mix
Series C 17 (22%)Series D 15 (19%)Series B 11 (14%)Series E 9 (12%)Series A 8 (10%)Series G+ 5 (6%)Growth 5 (6%)Private Equity 3 (4%)Debt 3 (4%)Seed 2 (3%)
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Open Security Engineer Roles in San Francisco
| Role | Company | Stage | Location | Posted |
|---|---|---|---|---|
| Security Engineer | Cognition AI | Series D | San Francisco | Jun 16, 2026 |
| Security Engineer | Lambda | Series E | San Francisco Office (Fremont St) | Jun 15, 2026 |
| Security Engineer, Detection and Response | Serval | Series B | San Francisco | Jun 11, 2026 |
| Staff Application Security Engineer | Abridge | Series E | SF Office | Jun 10, 2026 |
| Staff+ Security Engineer, Risk Engineering | Anthropic | Series G+ | San Francisco, CA | Jun 10, 2026 |
| Security Engineer, Detection and Response | Notion | Private Equity | San Francisco, California | Jun 10, 2026 |
| MTS - Security Engineering | The Interaction Company of California | Series A | Palo Alto, California | Jun 10, 2026 |
| Principal Infrastructure Security Engineer | Crusoe | Debt | San Francisco, CA - US | Jun 9, 2026 |
| Product Security Engineer | StackAI | Series A | SF Office - 171 2nd, 4th floor | Jun 9, 2026 |
| Senior Linux Security Engineer | True Anomaly | Series D | Denver, CO or Long Beach, CA or SF Bay Area | Jun 9, 2026 |
| Principal Security Engineer | Candid Health | Series C | San Francisco (CA), Denver (CO), New York (NY) | Jun 8, 2026 |
| Security Engineer, Corporate Security | Notion | Private Equity | San Francisco, California | Jun 8, 2026 |
| Principal Offensive Security Engineer | Postman | Series D | San Francisco, California, United States | Jun 8, 2026 |
| Senior Application Security Engineer | Zip | Series D | San Francisco | Jun 8, 2026 |
| Staff Security Engineer | Collective | Series C | San Francisco | Jun 4, 2026 |
| Senior Enterprise Security Engineer | Abridge | Series E | SF Office | Jun 3, 2026 |
| Sr. Embedded Security Engineer | Span | Series C | San Francisco | Jun 3, 2026 |
| Sr. Offensive Security Engineer | Span | Series C | San Francisco | Jun 3, 2026 |
| Security Engineer, Corporate Security | Persona | Series D | San Francisco | May 29, 2026 |
| Security Engineer, Enterprise | Persona | Series D | San Francisco | May 29, 2026 |
| Security Engineer, IAM | Sentry | Series E | San Francisco, California | May 29, 2026 |
| Senior Application Security Engineer | True Anomaly | Series D | Denver, CO or Long Beach, CA or SF Bay Area, CA | May 28, 2026 |
| Senior Cloud Security Engineer | True Anomaly | Series D | Denver, CO or Long Beach, CA or SF Bay Area, CA | May 28, 2026 |
| Senior Embedded Security Engineer, Flight Software | True Anomaly | Series D | Denver, CO or Long Beach, CA or SF Bay Area, CA | May 28, 2026 |
| Cloud Security Engineer | Hex | Series C | SF, NYC, or Remote (US) | May 22, 2026 |
| Staff Security Engineer, Infrastructure | fal | Series D | San Francisco | May 21, 2026 |
| Application Security Engineer | Opal Security | Series C | San Francisco | May 20, 2026 |
| Product Security Engineer | Candid Health | Series C | San Francisco (CA), Denver (CO), New York (NY) | May 18, 2026 |
| Security Engineer | Assort Health | Series B | San Francisco | May 14, 2026 |
| Security Engineering Intern - Summer 2026 | Lambda | Series E | San Francisco Office (Fremont St) | May 14, 2026 |
| Cloud Security Engineer | Braintrust | Series B | San Francisco | May 7, 2026 |
| Application Security Engineer | Braintrust | Series B | San Francisco | May 7, 2026 |
| Staff, Security Engineer (App & Product Sec) | Sprinter Health | Series B | San Francisco, CA | May 5, 2026 |
| Platform Security Engineer | Applied Compute | Series A | San Francisco | May 4, 2026 |
| Staff Product Security Engineer | Harvey | Series G+ | San Francisco | May 1, 2026 |
| Corporate Security Engineer, Lead | Sierra | Series E | San Francisco, CA | May 1, 2026 |
| Member of Technical Staff - Security Engineer | Reflection AI | Series B | San Francisco | Apr 30, 2026 |
| Senior Product Security Engineer | Harvey | Series G+ | San Francisco | Apr 29, 2026 |
| Security Engineer, Anti-Abuse | LMArena | Series A | Bay Area | Apr 22, 2026 |
| Product Security Engineer | Persona | Series D | San Francisco | Apr 21, 2026 |
| Senior Product Security Engineer | Persona | Series D | San Francisco | Apr 21, 2026 |
| Staff Corporate Security Engineer | Crusoe | Debt | San Francisco, CA - US | Apr 20, 2026 |
| Security Engineer | Juicebox | Series B | San Francisco | Apr 20, 2026 |
| Security Engineer | Mercor | Series C | San Francisco | Apr 16, 2026 |
| Security Engineer, Cloud Infrastructure | Mercor | Series C | San Francisco | Apr 16, 2026 |
| Security Engineer, Automation | Mercor | Series C | San Francisco | Apr 16, 2026 |
| Security Engineer, Application Security | Mercor | Series C | San Francisco | Apr 16, 2026 |
| Security Engineer, Application Security | Mercor | Series C | San Francisco or NYC | Apr 15, 2026 |
| Security Engineer, Cloud Infrastructure | Mercor | Series C | San Francisco or NYC | Apr 15, 2026 |
| Lead Security Engineer | Periodic Labs | Seed | Menlo Park | Apr 15, 2026 |
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FAQ
How many Security Engineer jobs are open in San Francisco?
There are currently 78 open Security Engineer jobs in San Francisco across 46 AI startups on Fast AI Jobs.
What funding stages are hiring Security Engineers in San Francisco?
24% of open Security Engineer roles in San Francisco are at Series A–B startups, with the rest spread across seed and later-stage companies.
How often is this list updated?
Listings are refreshed daily from official company career pages and deduplicated by posting. Every link points to the original application page.