CEH · CCNA · Security Engineer

Building secure,
useful software.

I'm Vijay Velu — security engineer and ethical hacker based in India. Vee Labs is where I ship privacy-first mobile apps and field-service tools, applying the same attack-minded thinking to build better defenses into everything I write.

View Projects Security Blog ↗ GitHub ↗
// tech stack & certs

Expertise

Languages, frameworks, platforms, and certifications.

🎓 CEH 🌐 CCNA 🕵️ Penetration Testing 🚩 CTF / HackTheBox ⚡ Flutter ◆ Dart K Kotlin 🤖 Android 🔥 Firebase ◈ MVVM 🔐 k-Anonymity 💳 RevenueCat ✦ Claude API 🤖 AI Agents ◉ Google AI 💬 Prompt Engineering
// ai labs

AI Labs

Building with AI — agents, tooling, and prompt engineering across Claude and Google.

✦

Claude Agents

Custom Claude.ai agent configurations built for real workflows — research, data analysis, incident response, and structured data extraction.

🔍 Deep Researcher sonnet-4-6
📊 Data Analyst sonnet-4-6
🚨 Incident Commander opus-4-6
⚙️ Structured Extractor sonnet-4-6
⌨️

Claude Code

Using Claude Code CLI as a daily dev tool — shipping BreachGuard and ACServiceApp with AI-assisted architecture, refactors, and security reviews.

Claude Code CLI VS Code Extension MCP Servers Hooks Custom Agents Subagents
◉

Google AI

Certified in Google's AI agent track. Building and evaluating agentic systems with Gemini, Google AI Studio, and Vertex AI tooling.

Agent Assist & Gen AI Build AI Agents Gemini AI Studio Vertex AI
// projects

What I've Built

Apps in active development — real users, real problems.

🔐
active

BreachGuard

Privacy-first password and email breach monitor for Android & iOS. Passwords are never transmitted — SHA-1 is computed locally, only a 5-char prefix is sent via k-anonymity to HaveIBeenPwned.

Flutter Firebase HaveIBeenPwned RevenueCat AdMob SecureStorage
View Repo → Flutter · cross-platform
🛠️
v21

ACServiceApp

Field service ticketing app for AC technicians. Role-based access for Admin, Office Staff, and Technicians. Real-time Firestore sync, spare sheet tracking, and activity logs.

Kotlin Android Firebase Firestore MVVM Navigation
View Repo → Kotlin · Android native
// recent activity

Latest Commits

What's shipping right now across both repos.

ACServiceApp f7b202c
feat: v21 — Last Call Received tech guard, cumulative spare pending, real-time fix
ACServiceApp aea5765
fix: security hardening and review findings for Play Store release
ACServiceApp 1069bd9
fix: v20 — delete/recycle, resolved removal, auth fix, email UI, test data
BreachGuard f27489c
fix: replace invalid AdMob App ID with test ID — crash on launch resolved
BreachGuard bbf0ab1
fix: all Android build errors resolved — debug APK now compiles cleanly
BreachGuard 458286e
fix: Android build for Android Studio + added comprehensive setup guide
BreachGuard 34c5cca
docs: add RELEASE_SETUP.md — pre-release checklist for production deployment
// about

The Person Behind It

One developer, two apps, zero shortcuts on security.

👨‍💻
Vijay Velu
// senior IAM engineer · security engineer · indie mobile dev · India

I'm a Senior IAM Engineer (11+ years, CEH, CCNA) who believes understanding how attacks work is the best way to build stronger defenses. Vee Labs is where that mindset meets mobile development — every app I ship gets the same scrutiny I'd apply to a pentest: k-anonymity for privacy, hardened Firebase rules, Play Store security review, and no shortcuts before release.

Outside the codebase I run a self-hosted homelab with local AI inference (Ollama + LM Studio + Paperclip agents), play TryHackMe rooms and HackTheBox machines, and study for the next certification. All of that lives on my security blog.

⬡ GitHub/vijay-velu ⬡ GitHub/vee-labs in LinkedIn 🚩 TryHackMe ✎ Security Blog