I am Sofiene Hamzaoui, a Tunisian engineer with over 20 years of experience spanning cybersecurity, AI engineering, hardware debugging, and system optimization. Known online as sniper4u2, B13, or spaypeur, I specialize in:

• Advanced Pentesting: Breaking systems to make them bulletproof.
• AI Optimization: Running large models on constrained hardware.
• Hardware Hacking: Reverse-engineering firmware and debugging embedded systems.
• Cyber Defense: Securing critical infrastructure against advanced threats.

I’ve worked with cyber defense agencies, simulated SS7 attacks, reverse-engineered STM32 firmware, and developed cutting-edge tools like AIPenetraGuard. Whether tackling Pegasus-class spyware, optimizing CUDA workloads, or tuning Kali Linux, I thrive at the bleeding edge of technology.

• Low-VRAM LLM Optimization:

  • Ran Qwen-14B on a 4GB GPU using offloading, paged memory tricks, and CUDA tuning.
  • Achieved 40% inference speed gains on quantized models (Q2_K–Q8_0).

• Adversarial AI Defense:

  • Designed adversarial tests for prompt injection and embedding manipulation.
  • Built anomaly detectors to mitigate LLM hallucinations and contextual poisoning.

• LangChain Enhancements:

  • Patched LangChain’s wrappers, resolving token retry issues and API crashes.
  • Integrated GPT-Engineer into CI/CD pipelines for seamless AI deployments.

• GGUF Quantized Models: Debugged loaders, reducing VRAM usage by 30%.
• Memory Optimization: Eliminated fragmentation in Python-native wrappers.
• Concurrency & Deadlocks: Debugged multi-threaded API services under high load.
• Hybrid Dependencies: Solved Python/Rust/CUDA dependency conflicts.

• AIPenetraGuard:

  • Developed a framework combining adversarial fuzzing, LLM red teaming, and real-time anomaly detection.

• Telecom Exploitation:

  • Simulated SS7 attacks and SMS interception using Sigploit.
  • Identified vulnerabilities in SMPP and telecom interconnects.

• Forensics & Recovery:

  • Conducted spyware analysis with Cellebrite UFED.
  • Automated recovery workflows for leaked credentials and metadata.

• Web & App Security:

  • Secured platforms like GadgetsForSale by fixing JWT misconfigurations and rate-limit bypasses.
  • Designed DDoS defenses integrating dynamic IP filtering.

• Firmware Extraction: Used ST-LINK v2 and OpenOCD for reverse engineering STM32 microcontrollers.
• Bootloader Debugging: Fixed issues in STM32CubeProgrammer and rebuilt firmware configurations.
• IoT Security: Analyzed and patched firmware protections in closed-source IoT devices.

• Kali & BlackArch Power User:

  • Mastered 50+ tools, including sqlmap, Metasploit, Nikto, and OWASP ZAP.
  • Built Dockerized pentest labs and optimized TLP for power efficiency.

• System Tuning:

  • Recovered broken Arch Linux installs by debugging rogue packages.
  • Tuned I/O schedulers and systemd configurations for real-time scans.

• Scripting:

  • Developed Rust, Python, and Bash scripts for threat detection and log parsing.

1. Optimized CUDA Config for Low-VRAM GPUs:

   • View Gist

2. LangChain API Wrapper Fix:

   • View Patch

3. Pipeline Automation with GPT-Engineer:

   • View Repo

4. STM32 Debug Session Fixer:

   • Coming Soon

A cutting-edge Command & Control server with real mobile network exploitation capabilities.

Key Features:

• Real-time Agent Monitoring: Live tracking of compromised devices
• Advanced Payload Generation: Custom malware payload creation system
• GSM/SS7 Network Exploitation: Mobile network protocol manipulation and interception
• 0-Click Exploit Framework: Automated vulnerability exploitation engine
• Web-based Dashboard: Interactive command and control interface
• Secure Communications: Military-grade encryption and authentication

Technical Stack:

• Backend: Python, FastAPI, WebSockets
• Frontend: Next.js, React, TypeScript
• Protocols: GSM, SS7, HTTP/HTTPS
• Database: Redis, MongoDB
• Security: AES-256 encryption, JWT authentication

Demonstration:

• Live Demo Available (When running locally)
• Source Code
• API Documentation

• LLM Quantization Benchmarks:

  • View Logs

• AI Red Teaming Logs:

  • Download Logs

• Pentest Reports:

  • Coming Soon

• ✅ Cybersecurity Veteran: 20+ years in government and private sectors.
• ✅ Advanced OSINT Researcher: Skilled in Maltego, Sherlock, and database leak analysis.
• ✅ Certified: First Aid, Truck Driving, Stewardship, Pharmacy.
• ✅ Multi-lingual: Fluent in English, French, Arabic, Russian, and German.

"When systems fail, I don’t just fix—I rebuild. From microcontrollers to AI models, I trace the flaw, decode the logic, and craft solutions that survive chaos."

• GitHub: github.com/sniper4u2
• Email: sofienehamzaoui2@gmail.com
• Tools Case: start.me Profile

If you’re looking for a cyber guardian, LLM optimizer, or red team specialist, let’s collaborate to outsmart the next generation of threats—together.