About Me
A passionate builder with a security mindset — I write clean code and break things (ethically).
Full-Stack Developer & Cybersecurity Specialist
I am a passionate programmer, developer, and security enthusiast who enjoys building secure, high-performance web applications and helping organizations identify and remediate vulnerabilities.
I enjoy building secure, performant web systems and contributing to open-source tools in the security space. Whether it's a full-stack Laravel application, a CTF challenge, or a penetration test — I bring both engineering precision and a hacker's curiosity to the table.
By the Numbers
A quick snapshot of my experience, output, and dedication to the craft.
Projects Completed
Technologies Mastered
Security Assessments
CTF Competitions
Skills
A breakdown of my current technical expertise — from backend frameworks and security utilities to databases and DevOps tooling.
Resume
My educational background and professional journey in software development and cybersecurity.
Education
Bachelor of Science in Information Technology
University of Mindanao — Davao City
During my time in college, I collaborated to build "Hap" (Happenings), an event-centric social media platform. For my thesis, I engineered an automated academic advising system to help students shifting courses by analyzing earned units, calculating remaining duration, and dynamically recommending university degree programs. I also actively participated in 5 Capture the Flag (CTF) security competitions, trained on TryHackMe, earned Cybrary certifications, and attended Google Developer Conferences (DevFest).
Continuous Security Training
TryHackMe · HackTheBox · OWASP
Completed 100+ rooms on TryHackMe (Top 5% worldwide), active participant in CTF challenges and bug bounty programs.
Experience
Lead Full-Stack Developer
Enterprise Organization
Architected and built a comprehensive Full-Stack Laravel enterprise app, unifying business workflows into a central secure hub. Designed operational modules (Motorpool, Leave, Materials) and built an Android QR-based registration system.
Freelance Web Developer & Pentester
Freelance — Remote
Designed and developed custom web portals for international clients. Conducted penetration tests, vulnerability assessments, and provided secure code reviews aligning with OWASP standards.
Projects
A selection of my featured work — spanning security tools, full-stack web apps, and monitoring dashboards. Hover a card to explore.
Services
What I do — from architecting secure web systems to finding vulnerabilities before attackers do.
Penetration Testing
Web app, network, and API penetration testing following OWASP and PTES methodologies. Includes full written reports.
Full-Stack Web Development
End-to-end Laravel applications with clean architecture, REST APIs, authentication systems, and admin dashboards.
Vulnerability Assessment
Systematic scanning and assessment of applications and infrastructure to identify, classify, and prioritize security weaknesses.
Secure API Design
Design and implementation of secure RESTful APIs with rate limiting, Sanctum auth, input validation, and OWASP protections.
Security Monitoring Setup
Configuration of logging pipelines, intrusion detection alerts, and dashboards to give you real-time visibility.
Security Code Review
Manual and automated review of source code for injection flaws, broken authentication, and business logic issues.
Tech Stack
The tools, languages, and platforms I work with daily to build and secure modern applications.
Contact
Have a project in mind, a security question, or just want to connect? Send a message — I respond within 24 hours.
Location
Davao City, Philippines
dayondondiether@gmail.com
Phone
+63 912 345 6789
Response Time
Within 24 hours · PHT (UTC+8)
// PGP fingerprint available on request
// All security inquiries are treated confidentially