Open to opportunities

Joao Paulo Figueiredo Guedes

@jpfguedes

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Experienced penetration tester and Java developer improving security and application performance.

Brazil

Message

What I'm looking for

I seek hands-on security roles where I can perform penetration testing, improve app/network defenses, mentor teams, and grow with a security-focused, collaborative organization.

I am an experienced penetration tester and Java software developer with a track record of identifying critical vulnerabilities across networks, web applications, wireless networks and IT systems, and delivering remediation recommendations that reduced potential security threats by 30%.

I have built scalable Java applications, conducted comprehensive testing and debugging, and collaborated with cross-functional teams while maintaining up-to-date expertise through certifications including OSCP, OSCP+, and multiple Desec Security credentials.

Experience

Work history, roles, and key accomplishments

Current

Cybersecurity Penetration Tester

Current

Ministério Público do Trabalho - MPT

Sep 2017 - Present (8 years 4 months)

Conducted comprehensive penetration tests on company networks, web applications and wireless networks, 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 Risk Mitigation

Java Software Developer

Ministério Público do Trabalho - MPT

Mar 2015 - Sep 2017 (2 years 6 months)

Developed and implemented efficient Java algorithms and applications, collaborated with teams to deploy scalable solutions and reduced response time by 20% while decreasing bugs through testing.

Java Algorithms Performance Optimization Testing Agile Debugging Cross Functional Collaboration Deployment

Computer Maintenance Technician

Ministério Público do Trabalho - MPT

Jan 2009 - Mar 2015 (6 years 2 months)

Performed routine system checks, diagnostics and software updates to ensure optimal performance and security of computers and peripherals, and provided timely technical support to end users.

system updates Technical Support Inventory Management User Support

Java Software Developer

Cassems

Jan 2008 - Dec 2008 (11 months)

Developed and implemented scalable Java applications and efficient algorithms, improving application response time by 20% and reducing bugs through test plans and debugging.

Java Software Development Debugging Test Planning Agile Performance Optimization Collaboration Troubleshooting

Education

Degrees, certifications, and relevant coursework

Universidade Católica Dom Bosco

Post-Graduation, Software Development

2009 - 2011

Activities and societies: Designed Java artifacts, conducted debugging and testing, and provided technical mentorship on deployment and best practices.

Post-graduation focused on Java artifacts and mobile/Android application development, including design, implementation, and testing of Java components.

Universidade Federal de Mato Grosso do Sul

Bachelor of Science, Systems Analysis

2004 - 2008

Activities and societies: Developed and tested custom software solutions; collaborated with cross-functional teams; provided technical support and debugging.

Completed a Bachelor of Systems Analysis and Development (Sistema de Informação) focusing on software development, testing, and systems analysis.