Ibrahim ElSayed is a security engineer, based at Facebook's London HQ. Ibrahim focuses on using static analysis for scale security vulnerabilities detection and prevention. He is leading the work to build Facebook static analysis tools [Zoncolan](https://engineering.fb.com/security/zoncolan/) and [Pysa](https://engineering.fb.com/security/pysa/) to analyze more than 100M lines of code and identify critical bugs on scale. Before Facebook, Ibrahim worked for multiple companies and focused on performing penetration tests and red team engagements. Outside work, Ibrahim used to actively play CTFs with LCBC and BalalaikaCr3w, but now spends most of his time playing and watching football (aka soccer).