Hi there. My name is Guilherme Alves, and I'm an Offensive Security professional specializing in penetration testing and vulnerability research, with over three years of hands-on experience exploiting complex systems across web applications, Active Directory environments, and network infrastructure. Based in Brazil (but I'm also an EU citizen), I hold multiple industry certifications including HTB CPTS, THM PT1, eJPT and CompTIA Security+, and have successfully compromised over 250 vulnerable systems (Hack The Box machines) throughout my career. I'm also currently pursuing the Offensive Security Certified Professional (OSCP) certification.
| Certification | Issuer | Credential |
|---|---|---|
| Certified Red Team Operator (CRTO) | Zero-Point Security | Planned 2026.1 |
| Offensive Security Certified Professional (OSCP) | OffSec | In Progress |
| HTB Certified Penetration Testing Specialist (CPTS) | Hack The Box | View Credential |
| THM Junior Penetration Tester (PT1) | TryHackMe | View Credential |
| Junior Penetration Tester (eJPT) | INE Security | View Credential |
| CompTIA Security+ | CompTIA | View Credential |
| Google Cybersecurity Professional Certificate | View Credential |
| ProLab | Certificate Number | Status |
|---|---|---|
| Zephyr | HTBCERT-768675B159 | Completed |
| Dante | HTBCERT-FFA98CDC18 | Completed |
All prolabs credentials verifiable at HackTheBox Certificates
| TryHackMe | HackTheBox |
|---|---|
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hackersOnSteroids is brazil's #1 team on hack the box (htb). international crew of hackers, pentesters, software engineers, malware/exploit writers, infra people, mobile sec folks, and some absolute HTB tryhards. based in brazil but we've got people from india, germany, usa, puerto rico, pakistan... basically everywhere.
what we do:
- compete hard // every saturday we're grinding the HTB season. many of us cleared all active boxes already
- share knowledge // internal writeups for active machines/challenges and other events outside hack the box. we also mentor newer hackers
- infra // blog, internal collab platform, pentest report system, other stuff we coded ourselves
- partner up // we work with other like-minded teams like OSI and other crews globally
Infomundi was created with the mission of simplifying access to reliable, detailed information about countries worldwide.
A from-scratch build:
- Backend: Python + Flask + SQLAlchemy + MySQL
- Frontend: Bootstrap 5 + vanilla JS/CSS
- Status: Open Source
| Institution | Degree | Expected Graduation Date |
|---|---|---|
| FIAP | Technologist - Cyber Defense | Feb, 2026 |
| CEFR C2 | Native |
|---|---|
| English | Portuguese |
Always up for collabs, code reviews, or a quick security chat.


