Portfolio
Zahidul Islam (@zahidoverflow)

Zahidul Islam

Security Researcher & Developer • Web & API Penetration Testing, Bug Bounty & Reverse Engineering

WhatsApp Email Call Writeups
Security & CTF Platforms 3 Links

HackTheBox

Pro Labs
User ID: 1272133 • @zahidoverflow

Offensive machine exploitations, Pro Labs & ranked rank activity

TryHackMe

Infosec Rooms
tryhackme.com/p/zahidoverflow

Hands-on security rooms, offensive methodology & badges

Credly Certifications

Verified
users/zahidoverflow

Official verified digital badges & professional cybersecurity credentials

Engineering & Publications 5 Links

GitHub

Repositories
github.com/zahidoverflow

Security automation tools, exploits, PoCs & open-source repositories

Google Developer

Pathways
g.dev/zahidoverflow

Verified Google Developer Program profile & learning achievements

Google Play

Apps & Releases
my.play/zahidoverflow

Google Play Console developer profile, published applications & games

Security Writeups & Blogs

25+ Articles
zahidoverflow.github.io/posts/

Full HackTheBox walkthroughs, vulnerability teardowns & research

Official Portfolio

Hub
zahidoverflow.github.io

Interactive portfolio featuring skillset, featured work & background

Professional & Social Media 5 Links

LinkedIn

Network
in/zahidoverflow

Career timeline, recommendations, professional updates & network

X (formerly Twitter)

Microblog
@zahidoverflow

Infosec commentary, CVE discussions, tooling releases & updates

Bluesky

Decentralized
@zahidoverflow.bsky.social

AT Protocol decentralized social feed & tech community discussions

YouTube

Video Tech
youtube.com/@zahidoverflow

Security walkthroughs, practical demonstrations & tech tutorials

Gravatar

Web Identity
gravatar.com/zahidoverflow

Globally recognized web avatar, cryptographic hashes & verified handles

Direct Contact & Inquiries 3 Channels

WhatsApp

Instant
wa.me/zahidoverflow

Direct messaging for consultations, quick questions & security inquiries

Email

Inquiries
zahidoverflow@gmail.com

Security assessments, vulnerability coordination & formal collaboration

Direct Mobile

UTC+6
+880 9638-526929

Telephone line & SMS verification • Dhaka, Bangladesh

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© 2026 @zahidoverflow • Zahidul Islam

Security Researcher & Developer • Defense by Offense

Portfolio Writeups Resume GitHub
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