Seif Osman
Cybersecurity & IT Store Technology Engineer · Full-Stack Builder
Staten Island, NY · seifosman53@gmail.com · github.com/seifosmaan53 · LinkedIn
Summary
Cybersecurity-focused Computer Science engineer with 5+ years securing and supporting large-scale retail infrastructure across 867 stores. Skilled in vulnerability discovery (physical & software), incident-response fundamentals, AI workflow automation, server hardening, secure configuration, SIEM-style log analysis, firewall tuning, and building secure systems from scratch. Experienced in identifying weaknesses, improving enterprise risk posture, mentoring new technicians, and running large distributed environments.
Experience
- Build, secure & deploy POS/register systems from scratch — OS imaging, encryption, hardened configs, strict access control.
- Identify vulnerabilities across store systems, networks, POS devices & physical setups; design and implement mitigations.
- Configure & maintain Cisco routers/switches, VLANs, firewalls, wireless and store servers across the fleet.
- Capture & analyze traffic and logs with Wireshark, tcpdump & ELK to detect anomalies and misconfigurations.
- Built AI-driven diagnostic workflows that cut troubleshooting time ~40% and reduced downtime 30–40%.
- Trained 10+ new technicians from scratch; built ~200 stores A→Z as the primary technical mentor.
- Secured warehouse inventory in Oracle NetSuite with strong role-based access controls.
- Created a randomized barcode-scanning workflow to prevent unauthorized edits, duplication & fraud.
- Analyzed logs and workflows to surface vulnerabilities and process gaps; partnered with Oracle engineers on fixes.
Selected Projects
- Asset Vault — full-stack asset & device management (React 19 · NestJS 11 · PostgreSQL · RBAC). In production; 1,000+ devices, 3 admins.
- Packet Analyzer — terminal packet sniffer with live capture, protocol parsing & pluggable threat detectors (Python · Scapy · Textual).
- Store Ticket Assistant — local-first Tauri + Rust desktop app with offline Whisper transcription; 277 tests.
- POS System — point-of-sale built from scratch on vanilla Node.js and a raw HTTP server with SQLite and receipt printing.
- …and more on the portfolio →
Education
B.S. Computer Science
College of Staten Island, CUNY — June 2026
Certifications
- Google Cybersecurity Certificate (in progress)
- CompTIA Security+ (in progress)
- TryHackMe / HackTheBox — active labs
- Google Project Management Certificate
- CodePath — Intermediate Technical Interview Prep
Skills
Security — vulnerability discovery, threat detection, hardening, POS security, SIEM-style log analysis, firewall tuning · Tools — Nmap, Wireshark, tcpdump, Kali, Splunk/ELK, OpenSSL · Engineering — Python, TypeScript, JavaScript, C++, Rust, React, NestJS, Node.js, PostgreSQL · Infrastructure — Cisco routers/switches, VLANs, firewalls, Linux, retail POS hardware · Languages — English & Arabic (fluent)