Work Experience & Education

• Developed RESTful API modules for role-based access control (RBAC) authentication and internal transaction data management using Next.js and PostgreSQL
• Designed optimized relational database schemas with indexing and query caching strategies to improve server response times
• Conducted regular code reviews, modular component refactoring, and API endpoint testing to ensure platform stability and scalability

• Developed Web POS Cashier Management System ready for all business types with real-time transaction monitoring
• Provided Web Coding Consultation Website Development services for college IT and programming assignments
• Built and deployed AI WhatsApp Customer Service Bot integrated with Gemini API for 24/7 automated responses
• Offered professional integration and custom feature module expansion to enhance business system functionality

• Built inventory & General Affairs management system across 3 companies from scratch (React+Vite, Express+Prisma)
• Conducted proactive security audits and discovered multi-tenant access control vulnerabilities on internal systems
• Led the refactoring of the internal HRD system, reducing code complexity by 36%
• Identified and resolved a critical bug in the employee payroll calculation flow that caused unrecorded data
• Configured and managed Ubuntu servers for internal company operations
• Built a local self-hosted server infrastructure (Ubuntu Server LTS) managed with PM2 and implemented WireGuard VPN over MikroTik (VLAN segmentation) to eliminate Cloudflare Tunnel dependency for secure private access

Concentration in Functional Networking & Security (JKF). Actively researching distributed backend architecture, API engineering, machine learning web attack monitoring (WAMS), and AI integration.

Began software development autodidactically during the pandemic. Mastered Python fundamentals, web protocols, foundational networking, and ethical hacking basics.