Theodoros Moutesidis
I break systems.
Then help
make them better.
Manual web & API testing. Secure code review. Tools that make security work better.
Thessaloniki, Greece · Working worldwide
Practical credentials
View qualifications ↗What can I help with?
Web & API
pentesting
Find weaknesses in authentication, access control, and business logic.
Explore service ↗Code review
& SAST triage
Turn source code and scanner findings into actionable fixes.
Explore service ↗Network &
identity security
Review infrastructure, Active Directory, and access boundaries.
Explore service ↗Security tooling
& AI systems
Build repeatable workflows for assessment, review, and reporting.
Explore service ↗Hands-on. End to end.
Enterprise
application security
Manual testing, findings validation, and remediation support.
View work ↗EngineeringFortify triage
automation
A Python pipeline for repeatable SAST review.
View work ↗ResearchAgentic
security systems
Development, evaluation, and evidence-focused reporting.
View work ↗Built it. Operated it.
Now I test it.
Software development, Linux, DevSecOps, and enterprise security. An engineering background that helps me connect a finding to a practical fix.
Experience & qualifications ↗From my toolbox.
A closer look.
When an AI pentest agent should stop claiming it found a bug
What a pre-registered verifier study changed in an LLM security agent's reports, and what the evidence does not establish.
Build an autonomous security agent you can explain
The Autonomous Offensive LLM Handbook now teaches bounded agent construction through runnable offline lessons, a lab, and an honest evidence register.
Let’s talk about your security.
Tell me what you’re building and what you need assessed.