Open to opportunities

Joao Paulo Figueiredo Guedes

@jpfdevscybersecurity

Message

Experienced penetration tester and Java developer focused on strengthening system security.

Brazil

Message

What I'm looking for

I seek a security-focused role where I can perform penetration testing, improve application and network defenses, mentor teams, and grow technical expertise in real-world environments.

I am an experienced penetration tester and Java developer with a strong track record securing networks, web applications, and IT systems. My hands-on work has identified critical vulnerabilities and reduced potential security threats through targeted remediation.

I have developed scalable Java applications and Java artifacts, improving performance and reducing response time while contributing to cross-functional teams to deliver reliable software. I routinely performed testing, debugging, and code reviews to raise code quality and maintainability.

As a cybersecurity professional I have conducted comprehensive penetration tests using advanced techniques, simulated real-world attacks, and produced detailed risk mitigation reports for clients. I hold practical, recognized certifications that validate my offensive security skills and lab-based experience.

I seek to continuously expand my technical knowledge, stay current with emerging threats, and apply pragmatic security measures that protect sensitive data and systems while enabling business continuity.

Experience

Work history, roles, and key accomplishments

Current

Cybersecurity Penetration Tester

Current

Ministério Público do Trabalho - MPT

Sep 2017 - Present (8 years 3 months)

Conducted comprehensive penetration tests on networks, web applications, wireless networks and IT systems, identifying critical vulnerabilities and delivering remediation reports that reduced potential security threats by 30%.

Penetration Testing Application Security Network Security Vulnerability Assessment Kali Linux Report Writing

Java Software Developer

Ministério Público do Trabalho - MPT

Mar 2015 - Sep 2017 (2 years 6 months)

Developed and optimized Java applications and algorithms, reducing response time by 20% and improving reliability through test plans and debugging across projects.

Java Software Development Debugging Test Planning Agile Methodologies Performance Optimization CI CD

Computer Maintenance Technician

Ministério Público do Trabalho - MPT

Jan 2009 - Mar 2015 (6 years 2 months)

Performed routine system checks, hardware/software troubleshooting and inventory management, implemented patches and updates to mitigate vulnerabilities and ensure system availability.

IT Support Patch Management Inventory Management

Java Software Developer

Cassems

Jan 2008 - Dec 2008 (11 months)

Designed and implemented scalable Java applications and artifacts, collaborated on debugging and deployment, and provided technical support to improve project efficiency.