Security Software Engineer
RunSybil · Remote · United States ·
COMPENSATION
€•• – ••k
Listed on the employer's job board (Ashby)
- Fully remote (US)
- Python + React
- LLM integration
- Offensive security
- Equity offered
Join RunSybil to develop Sybil, an AI-powered pentester that automates hacker intuition. You will research and ship offensive security features, translating vulnerability findings into repeatable, automated techniques for defenders.
The team comprises experts from leading tech and security firms. You will work closely with engineering and product teams to extend Sybil's reach across attack surfaces using generative AI.
What you'll do
- Research and develop offensive agentic capabilities for core product features
- Hunt for vulnerabilities and translate findings into automated techniques
- Build and ship end-to-end customer-facing features from research to production
- Design LLM-powered tooling to extend attack surface coverage
- Identify gaps in offensive coverage and propose technical initiatives
- Contribute to design discussions and review teammate code
- Own problem definition, solution building, and deployment
What you'll need
- 4+ years of software engineering experience with offensive security focus
- Hands-on vulnerability finding via red teaming, bug bounties, or pentesting
- Strong Python fundamentals with production backend system experience
- Comfort with modern JavaScript and React for full-stack feature ownership
- Experience building with LLMs, prompt engineering, and workflow integration
- Familiarity with DevOps and infrastructure concepts for deployment pipelines
- Strong written communication skills for explaining technical decisions
Stack
- Python
- JavaScript
- React
- LLMs
How you'll work
- Fully remote within the United States
- Full-time employment
What you get
- Base salary between $170,000 and $210,000
- Meaningful equity package
- Ownership in company building