Osvaldo João

I am a Computer Science Engineer specialized in Information Security, Cybersecurity, and Secure Systems. Hands-on experience in vulnerability assessment, penetration testing, web application and API security testing, security best practices, and secure software principles through practical labs, independent projects, and platforms such as TryHackMe and Hack The Box. Familiar with security architectures, risk assessment, vulnerability management, incident response, encryption, firewall technologies, and security protocols.

Proactive learner with strong analytical and communication skills, committed to protecting IT environments against cyber threats and supporting organizational security objectives.

Penetration Tester (2026-01 – Present)

Currently involved in the technical development of a academic platform, focusing on scalable architecture, secure data handling, and structured guidance workflows for students from developing countries.

Hands-on Cybersecurity Training at TryHackMe (2023-12 – Present)

Gained practical, lab-based experience in ethical hacking and cybersecurity through structured learning paths and real-world scenarios. Developed skills in network security, web application testing, privilege escalation, and vulnerability assessment by completing interactive rooms and guided challenges. Strengthened problem-solving abilities and a security-focused mindset by simulating real attack environments.

Web Security Labs Experience at PortSwigger (Web Security Academy) (2024-01 – Present)

Acquired in-depth knowledge of web application vulnerabilities by completing hands-on labs focused on the OWASP Top 10. Practiced identifying and exploiting issues such as SQL Injection, Cross-Site Scripting (XSS), authentication flaws, and access control vulnerabilities. Demonstrated the ability to analyze, exploit, and report security weaknesses using industry-relevant tools and methodologies.

Bachelor's in Computer Science Engineering – Andhra University