Short Bio

I am a Computer Engineering student with a relentless drive for building robust, secure applications. My journey is defined by a deep curiosity for how complex systems operate and how to defend them, leading me to blend rigorous architectural design with offensive and defensive cybersecurity principles. I don't just write code; I construct engineering solutions that are resilient and efficient.

• 🎯 Specialty: Architecting scalable backend systems and secure web applications with a structure-first mindset. My real strength lies in understanding software architecture, system design, and security fundamentals database design, secure API structures, and web application security.
• 🚀 Goals & Interests: Building software that's secure from day one, with security baked into architecture rather than bolted on. Actively exploring freelance/portfolio work alongside my studies.

Group & Tutorial Exchange Platform for GUC Students.

Trained a custom Logistic Regression classifier from scratch on ~300k samples with 29 handcrafted NLP features to detect AI-generated text, zero ML framework dependencies at inference.

Self-hosted WAF + SIEM + IDS with 32 threat detectors, escalating auto-bans, and a real-time security dashboard built on Hono + PostgreSQL.

A URL shortening platform with click analytics, QR codes, password protection, expiration dates, click limits, anonymous monitoring, and user dashboards built on Hono + Cloudflare.

• 🎯 Bug Hunter | HackerOne (Aug 2026 - Present)
  • Independent security researcher conducting authorized penetration testing on public bug bounty programs.
  • Focused on web application, API, authentication, and authorization security.

• 🎓 B.Sc. in Computer Engineering | German University in Cairo (GUC) (2025 - Present)
  • Focus: computer systems architecture, algorithms, software engineering, and cybersecurity.

• 🏆 Ethical Hacker Cisco

• 🏆 Cryptography I Stanford University

• 🏆 Machine Learning Specialization DeepLearning.AI & Stanford University

  • 🎓 Supervised Machine Learning: Regression and Classification
  • 🎓 Advanced Learning Algorithms
  • 🎓 Unsupervised Learning, Recommenders, Reinforcement Learning

• Website: usfahmed.dev
• Email: hello@usfahmed.dev
• LinkedIn: linkedin.com/in/usfahmed
• GitHub: github.com/usfa7med

© 2026 Youssef Ahmed Abdelfatah. All rights reserved.