CBBH Journey – From Backend Developer to Offensive Security Specialist
October 1, 2025
CBBH Journey – From Backend Developer to Offensive Security Specialist
Learn to attack in order to defend better.For over 10 years, I've been building backend systems. I know the patterns, the frameworks, the best practices. What I was missing for a long time: the perspective of someone trying to break through my defenses. The CBBH certification (Certified Bug Bounty Hunter) from Hack The Box is my systematic approach to closing that gap.
Why Offensive Security?
"Security is not a feature, it's a foundation."As a backend developer, I spent years implementing security measures -- prepared statements, bcrypt, HTTPS, input validation. The usual suspects. But I never truly understood how an attacker operates. What gaps they look for. What assumptions they exploit.The moment I compromised one of my own API endpoints through a simple IDOR attack changed everything. The vulnerability was there despite having authentication and authorization in place. I would never have found it if I hadn't started thinking like an attacker.
The Approach
The CBBH path on HTB Academy provides a structured journey through web application security:
Systematic learning instead of YouTube tutorials -- from fundamentals to certification
Hands-on labs with real-world scenarios, not just theory
Learning in public -- I document the journey on my blog so other developers can benefit from my insights
Every module changes how I write code. Not someday, but immediately.
What I'm Learning
The CBBH certification covers the most critical attack vectors for web applications:
OWASP Top 10 -- the most common web application vulnerabilities
SQL Injection -- from simple UNION attacks to blind SQLi
IDOR & Broken Access Control -- the vulnerability I found in my own code
API Security Testing -- systematically testing endpoints for weaknesses
Tools: Burp Suite, nmap, sqlmap, ffuf, Hashcat
Current Status
The journey isn't complete yet -- and that's exactly what makes it authentic:
55%+ of the Penetration Tester Path completed
Multiple production endpoints patched based on what I've learned
Blog series documenting insights and lessons learned
Every week I understand better how attackers think -- and every week my code becomes more secure.
Next Step: Triple Crown
CBBH is just the beginning. My goal is the HTB Triple Crown:
CBBH -- Certified Bug Bounty Hunter (in progress)
CPTS -- Certified Penetration Testing Specialist
CWEE -- Certified Web Exploitation Expert
Not as a career switch to pentesting, but as validation that I truly understand the attacker's perspective. A backend developer who can build AND break systems builds better systems.
Tech Stack & Tools
Platform: Hack The Box Academy
Primary Tools: Burp Suite Professional, nmap, sqlmap, ffuf
Languages: Python, Bash (exploit scripting)
Focus: Web Application Security, API Security, Authentication Bypass
Documentation: Blog series on buengener-software.de
