Djefferson Saintilus is a Haitian cybersecurity professional specializing in penetration testing and secure backend development. Known as “Kal” in online communities¹, he is recognized for practical problem-solving in web security, combining professional pentesting, open-source tooling, and community education.

• Completed the Junior Penetration Tester learning path (TryHackMe)²
• Completed Offensive Penetration Testing coursework (Cybrary)²
• Certifications: CEH v9 (Certified Ethical Hacker) and LPIC-1 (Linux Professional)³
• Ongoing Computer Science studies with emphasis on Python and PHP⁴

• Secure Society — Co-founder and lead, delivering vulnerability assessments and penetration tests⁵
• KWENPAM — Web Penetration Tester (e-commerce, Haiti)⁴
• MaketPAMHT — Web Application Security Analyst (e-commerce, Haiti)⁴

• PASM — Password Manager Security Analyzer⁶
• gtoSearch — CLI helper for GTFOBins queries⁶
• NoteMaster — PyQt5 note-taking application⁶
• SpyPro — Automated pentesting workflow tool⁶
• File Integrity Checker — CLI hashing/tamper detection⁶
• SWAV — Deliberately vulnerable web app for training⁶

• French-language Termux tutorial eBook⁴
• Founder of the Hackbookin blog and Terlinux YouTube channel⁴
• Multilingual podcasts in Spanish, English, Haitian Creole, and French⁷
• Interviewed in Haitian tech media about Secure Society’s mission and client work⁵

Haitian by birth; currently based in Santo Domingo, Dominican Republic⁴. Interests include gaming, podcasting, and community building. Languages: French, Haitian Creole, Spanish, and English⁷.