Security Testing & Quality Assurance — Finding bugs before attackers do.

Pentesting web · QA funcional · AI Systems Testing ·

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eJPT Certified · 13+ years experience · Based in Spain, working worldwide

I’m Estefanía, a cybersecurity and QA specialist with 13+ years of remote experience working for international companies. I find what’s broken, what’s vulnerable, and what doesn’t behave the way it should.
My background combines web pentesting, functional QA and AI systems evaluation — three disciplines that share one core skill: systematic thinking and attention to detail.

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Code & Projects
Cheatsheets & Write-ups

Code & Projects QA tools, automation scripts, pentest lab documentation and technical projects. View on GitHub →
Cheatsheets & Write-ups A growing knowledge base with pentesting cheatsheets, CTF write-ups and security references — built for practitioners. Open the knowledge base →

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Web Pentesting OWASP methodology. Reconnaissance, exploitation and documented report with remediation steps. Web applications, APIs and infrastructure.

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QA & Security Testing Functional and security coverage in one engagement. Manual testing, API validation, E2E automation and bug reporting with full traceability.

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AI Systems QA Prompt testing, adversarial evaluation and edge case detection for LLMs. RLHF annotation and rubric design for frontier AI models.

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Pentesting web · QA funcional · AI Systems Testing ·

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