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RAGEL
LISTIYONO

Cyber Security Researcher

Specializing in Node.js & Backend Technologies

Building secure, robust web applications with expertise in cybersecurity and VPS management

Ragel Listiyono

<ABOUT/>

A Cyber Security Researcher specializing in backend technologies, particularly Node.js. Experienced in building robust web applications, automation tools, complemented by a strong background in VPS management and web hosting solutions.

Possesses additional expertise in cybersecurity and vulnerability mitigation, enhancing the ability to create secure and reliable applications.

Holds a long-standing passion for exploring and implementing new technologies, constantly staying at the forefront of modern development practices.

Full-Stack Development

Specialized in Node.js, JavaScript, and Express.js for building scalable applications

Security Expertise

Strong background in cybersecurity and vulnerability mitigation practices

Infrastructure

Redis, Docker, Linux/VPS Administration, Nginx/Reverse Proxy.

<EXPERIENCE/>

Web Developer / Hosting & Domain Reseller / Bug Hunter

IT Freelance

Sidoarjo, ID

Jan 2022 - Present
  • Collaborated with clients to understand their requirements and designed custom websites tailored to their needs
  • Implemented security best practices and conducted thorough testing to ensure the websites' reliability and performance

Web Development & Security Instructor

CV. Nuri Kencana

Sidoarjo, ID

Feb 2019 - Nov 2021
  • Instructed trainees on web development principles, guiding them through the process of building websites from scratch or using CMS
  • Provided hands-on training on Virtual Private Server (VPS) administration, covering initial setup, OS configuration, server hardening, and routine management
  • Educated participants on best practices for website maintenance, performance optimization, and server monitoring
  • Developed and delivered a comprehensive curriculum on web security, teaching methods to identify and prevent common vulnerabilities (CSRF Attacks, Plugin bugs, SQL Injection)

Webmaster

CV. Prima Nusa Saintifika

Sidoarjo, ID

Sep 2017 - Oct 2018
  • Developed a website with a private cloud storage solution, enabling secure and efficient data management
  • Customized private website templates to meet the specific branding and functional requirements
  • Performed regular maintenance and updates on the organization's website to ensure optimal performance, security, and user experience

<EDUCATION/>

Diploma in Informatics Engineering

Electronic Engineering Polytechnic Institute of Surabaya

Surabaya, Indonesia

Aug 2022 - Aug 2025
Selected participant in Program ITE Singapore West Campus - Sustainable Energy
Spearheaded the planning and execution of a webinar focused on technological advancements and trends in IT

Webinar Organizer

Informatics Engineering Webinar - PENS

Surabaya, Indonesia

Sep 2023 - May 2024
Collaborated with subject matter experts and industry professionals to curate engaging and informative content
Facilitated interactive Q&A sessions, fostering knowledge sharing and discussion among participants

Certifications

Bug Bounty DISKOMINFO (2025)

<SKILLS/>

Hard Skills

Programming

Node.jsJavaScriptExpress.js

Infrastructure

Server Management (VPS)NetworkingCloudHosting

Security

CybersecurityVulnerability AssessmentWeb SecurityServer Hardening

Soft Skills

Problem-Solving & Critical Thinking
Strong Analytical Skills
Communication Skills
Collaboration & Teamwork
Adaptability & Continuous Learning
Time Management & Organization

Continuous learner with a passion for staying updated with the latest technologies and best practices in web development and cybersecurity.

<CONTACT/>

Let's connect and discuss how we can work together on your next project

Ready to Start a Project?

I'm always open to discussing new projects, creative ideas, or opportunities to be part of your vision.

Get In Touch