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jeffreyesdavid/README.md

Hello, I'm Jeffrey

Fraud & Security Analyst in the making. I build open-source tools that stop scams, theft and data exposure before they happen.

A decade in digital marketing and e-commerce gave me an insider's view of how fraud actually works: fake storefronts, social engineering, phishing and paid-ad abuse. Now I build the defenses.

Open to: fraud, SOC and security analyst roles · Remote or Southern California · Relocating to New York in 2027

7 security tools shipped · 110+ automated tests · real-world phishing takedown reported · incident response write-ups

Projects

Following my progress? Every lab, write-up and lesson is logged in cybersecurity-journey →

Project What it does
aegis-guardian 🆕 A free, bilingual (English/Spanish) anti-scam agent: paste a suspicious text or screenshot and it explains the red flags and what to do next. Consent-first by design, so it can never become the surveillance tool it guards against. Bilingual scam checker live in the browser; AI layer powered by Meta's Muse Spark. Try it →
ai-guardian Discovers the AI agents on a machine (apps, coding agents, browser extensions, MCP plugins) and flags what they can reach: plain-text API keys, SSH keys, disabled permission prompts. Enterprise-style "shadow AI" visibility, free and local. Project page →
php-guardian Inventories every PHP install and flags versions exposed to php2shell, the critical flaw CISA warned about in Oct 2026. Shipped within a day of the alert; caught a real unpatched server in testing. JSON output for SIEMs. Project page →
wifi-guardian Spots fake Wi-Fi before you join it: evil twins, look-alike network names, "FREE WiFi" bait and router swaps (ARP spoofing). Built for small businesses and guest networks without enterprise budgets. See the demo →
vpn-guardian Verifies every 30 seconds that a VPN is actually protecting you, alerting laptop and phone the moment it drops or leaks your real IP, with a local AI that explains each alert in plain English. Project page →
beat-guard Fingerprints producers' beats, timestamps them on Bitcoin and detects them inside other songs, even beneath vocals or sped up. Generates an evidence report. Project page →
tx-guard Checks crypto transactions before you sign: matches 2,500+ known scam addresses, catches wallet-draining approvals and simulates the transaction to show exactly what you'd lose. Try it live →

Write-ups

Skills

Security: threat detection · incident response · fraud & scam analysis · threat modeling · secret scanning · network & wireless security · AI / LLM security Build: Python · Bash · Swift · Git · local AI (Ollama) · Ethereum · OSINT

Currently

  • Building Aegis Guardian, a bilingual AI scam shield powered by Meta's Muse Spark
  • Shipping the Guardian series hands-on: open-source security tools, each tested and documented
  • Logging the work in my cybersecurity journey

Find me

Resume · LinkedIn · SoundCloud

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  1. aegis-guardian aegis-guardian Public

    Consent-first personal safety & anti-scam agent — built so it can’t become the surveillance tool it prevents. Part of the Guardian security portfolio.

    Python

  2. ai-guardian ai-guardian Public

    Find the AI agents on your machine and see what they can touch. Free, local, open-source shadow AI scanner.

    Python

  3. wifi-guardian wifi-guardian Public

    Spots fake (evil twin) and look-alike Wi-Fi networks before you join them. Free, local, macOS.

    Python

  4. purple-star-chart purple-star-chart Public

    Zi Wei Dou Shu (Purple Star Astrology) in English — inspired by Renhuai123/ziwei-doushu

    HTML

  5. php-guardian php-guardian Public

    Free scanner for php2shell (CVE-2026-109618/109619): finds PHP installs and flags vulnerable versions, per CISA's alert.

    Shell

  6. vpn-guardian vpn-guardian Public

    Free personal security agent that catches VPN drops and leaks and alerts your Mac and phone.

    Shell