Denzel Okungbowa

I am a Java backend developer with a strong cybersecurity background, specializing in building secure backend systems, REST APIs, and applications with security considered throughout the development lifecycle.

I work primarily with Java and Spring Boot, with experience in REST API development, MySQL and PostgreSQL, authentication and authorization, Docker, Git, automated testing, and backend troubleshooting.

My cybersecurity experience includes web application security testing, vulnerability assessment, penetration testing, security research, and identifying vulnerabilities in applications and backend systems. I can approach development from both the engineering and security perspectives, helping identify security weaknesses before they become production problems.

I can help with:
• Java and Spring Boot backend development
• REST API design and development
• Authentication and authorization
• Database design and integration
• Web application security testing
• API security assessment
• Vulnerability assessment and penetration testing
• Security-focused code review
• Identifying and reproducing application vulnerabilities
• Backend bug fixing and troubleshooting
• Dockerized backend applications
• Automated testing with JUnit and Mockito
• Security improvements and remediation guidance

I focus on building practical, maintainable systems while keeping security, reliability, and real-world attack scenarios in mind.