You can call me Samuel; I am an Offensive Security Professional and Security Researcher, also known in the community as fl3x1nz.

Since 2019, I have specialized in identifying and mitigating vulnerabilities across Web Applications, APIs, and Network infrastructures within complex corporate environments. My approach focuses on a deep architectural understanding of systems to uncover how technical flaws escalate into real-world business risks. Currently, my core expertise lies in Web Application Penetration Testing, where I apply a rigorous analytical mindset to bypass modern security controls.

Current Operations

I actively operate as an independent Bug Bounty Hunter, holding a certification from HuntersPay and contributing to programs on HackerOne and Intigriti. Parallel to my research, I provide Security Consulting services, primarily assisting SaaS owners in hardening their platforms against sophisticated threats. I also write original articles for Medium, including write-ups, personal stories, and insights on new trends in the world of cybersecurity.

Professional Disclosure & Impact

As a Security Consultant I have find vulnerabilities to the following companies that gave me the proper permission to disclose them.

• RocketSeat: Brazilian-based EdTech platform.
• CvPorVaga: AI-driven SaaS for recruitment optimization.