Hi, I'm Fajar Geran Arifin
Backend Developer & System Engineer
Focused on internal systems, security, and AI-driven solutions
Focused on internal systems, security, and AI-driven solutions. Informatics Engineering student and IT Intern at Padud Jaya.
View Projects & Research
Focused on internal systems, security, and AI-driven solutions. Informatics Engineering student and IT Intern at Padud Jaya.
View Projects & ResearchAbout Me.
I am an Informatics Engineering student currently joining an internship program at Padud Jaya. My main interests are backend development, internal company systems, and system security.
My journey in programming started in high school during the pandemic, when I began self-learning technologies like Python and HTML. Over time, my interests expanded into ethical hacking and artificial intelligence.
During college, I joined the ethical hacking specialization group (JKF) and explored AI by building chatbots, expression systems, and Gemini API integrations. I am currently preparing AI support for my final research in system security.
Work Style
I apply a relaxed but highly structured way of working. I actively use AI tools to improve efficiency, especially for debugging and error analysis, while keeping quality and deadlines in check.
Vision
My primary goal is to build a career as a backend developer and system engineer focused on reliable, secure, and sustainable internal systems.
Career Journey
How Coding Started
Started self-learning Python and HTML. Then developed strong interest in ethical hacking and software development.
Backend, AI & Security
Joined ethical hacking specialization (JKF). Built AI chatbots, Gemini API integrations, and backend systems.
IT Intern @ Padud Jaya
Managing Ubuntu servers, self-hosted local web servers, and production factory servers.
Why Work With Me?
Structured & Efficient
A calm but organized work style, leveraging AI to speed up error analysis and debugging.
Independent & Responsive
Comfortable working independently with quick response to system issues while maintaining quality.
Clear Communication
Prioritizing clear and transparent communication in collaborative environments.
Backend & Security Focus
Building reliable internal systems while continuously improving backend, security, and AI capabilities.
Experience.
- Manage and maintain the company's internal servers
- Deploy Linux and Windows based systems
- Handle online operational systems
- Provide technical support for internal needs
- Maintain system stability and security
- Configured and managed Ubuntu servers for internal usage
- Built self-hosted local web servers
- Managed factory production servers for operational workloads
Expertise.
Backend Development
- Spring Boot
- RESTful API
- Authentication & Authorization
- Database Integration
- Server & Deployment
Server & Deployment
- Linux Server (Ubuntu)
- Windows Server
- Deployment & Maintenance
- System Monitoring
Artificial Intelligence
- AI Chatbot Development
- Gemini API Integration
- Prompt Engineering
- Basic Model Fine-Tuning
Security & Testing
- Ethical Hacking Fundamentals
- System Security Testing
- Vulnerability Analysis
Tools
- Git & GitHub
- Figma (UI Planning)
- AI-assisted Development Tools
Project Portfolio.
Security Assessment - Evil Twin & MITM Attack Simulation
A controlled Man-in-the-Middle attack simulation using Evil Twin on public Wi-Fi in an isolated lab environment.
Key Features:
- Rogue Access Point (hostapd), DHCP & DNS (dnsmasq), NAT & routing (iptables)
- Packet sniffing with Wireshark/tshark and HTTP/HTTPS traffic analysis
Tourism Web Demo
A tourism information website presenting destinations, place details, and a modern responsive interface.
Key Features:
- Mobile-first responsive design
- Tourism destination information catalog
Sales Recap Demo
A web app to digitally record and manage sales data with easier transaction monitoring and daily reports.
Key Features:
- Realtime sales data input
- Automatic recap reports
CFD Pangandaran
An event website promoting Car Free Day activities in Pangandaran, in collaboration with KKN 126.
Key Features:
- Complete event information
- Schedules and activity locations