João Varelas
Cybersecurity Consultant at xSTF
Porto Metropolitan Area Portugal
Summary
👤
Senior🎓
Top SchoolJoão Varelas is a cybersecurity consultant based in the Porto metropolitan area with 11 years of hands-on experience focused on red team operations, network infiltration, and pragmatic offensive security. He currently consults at VisionWare and contributes to the xSTF community, blending practical attack simulations with defensive insights to help organizations harden their networks. Trained in computer science at the University of Porto, he couples formal software development experience from earlier roles with deep operational security skills. João is comfortable moving from low-level network exploitation to advising on enterprise security posture, and he favors evidence-driven assessments that produce actionable remediation. Colleagues describe him as a methodical operator who brings a developer’s discipline to security engagements, making complex vulnerabilities understandable to technical and non-technical stakeholders.
12 years of coding experience
High School Diploma, Information Technology, High School Diploma, Information Technology at Escola Profissional do InfanteBachelor of Science - BSc, Computer Science, Bachelor of Science - BSc, Computer Science at Faculdade de Ciências da Universidade do Porto
Portuguese, English, Spanish
Github Skills (100)
python10
windows10
security10
infosec10
active-directory10
pentest10
pentesting10
hacking10
line-editor9
syntax-highlighting9
android9
bash8
decrypt8
google-chrome8
mitre-attack8
Programming languages (14)
Github contributions (5)
joaovarelas/shuffle-in
Aug 2019 - May 2023
Contributions:5 pushes, 1 branch in 3 years 9 months
securitytoolkit/securitytoolkit.github.io
Mar 2024 - Jul 2026
Contributions:70 pushes, 1 branch in 2 years 3 months
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