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Roshan Jeffrin R

Roshan Jeffrin R

Cybersecurity Intern · Python Developer · Web Application Security

Chennai, Tamil Nadu, India

@roshan_jeffrin_r

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🎓 Computer Science and Engineering at Meenakshi Sundararajan Engineering College · Graduating 2026

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About

Cybersecurity-focused Python developer with hands-on experience in web application security testing and vulnerability research. Has identified real-world vulnerabilities, completed PortSwigger Web Security Academy labs, and built automation tools for threat analysis and security workflows.

Experience

  • Bug hunter
    None
    — – Present

    Identified two valid security vulnerabilities in real-world web applications through hands-on security testing. Practised vulnerability discovery, validation, impact assessment, and responsible reporting while documenting findings and technical evidence.

Education

  • Computer Science and Engineering
    Meenakshi Sundararajan Engineering College
    Computer Science · May 2030
  • Higher Secondary Certificate
    PCKG Government Higher Secondary School
    Computer Science · May 2026

Skills

2 to 5 years 2 to 5 years Several years of experience.
Blender 3D 3D Modeling
3 to 6 months 3 to 6 months A few months of practice with it.
Git Xss Python Debugging Kali Linux API Testing Bug Hunting Sql Injection Access Control Bash Scripting Authentication SAP ABAP programming Vulnerability Research Web Application Security Testing
<3 months <3 months Just getting started - under three months. This is also what shows when a level has not been set.
Regex Automation Network Security Monitoring Network security fundamentals

Tools / apps / platforms

<3 months <3 months Just getting started - under three months. This is also what shows when a level has not been set.
Git Nmap HTTPx Linux GitHub Ubuntu VS Code Subfinder Burp Suite Kali Linux

Languages

Native / Bilingual Native / Bilingual Their first language, or as strong as one.
Tamil Speak · Read
Conversational Conversational Can hold an everyday conversation.
English Speak · Read · Write

Projects

  • UPI QR Threat Analyzer ↗
    Python3, Regex, Data Parsing, Threat Detection

    Python tool that decodes UPI QR payloads and flags suspicious merchant patterns using configurable multi-rule regex detection.

  • File Organizer CLI Tool ↗
    Python3, os, shutil

    Systems-level Python scripting and file system interaction for automation workflows.

  • Archive Organizer & Extractor ↗
    Python3, zipfile, rarfile, py7zr

    Programmatically handles ZIP, RAR, and 7Z archives with robust error handling for corrupt or malformed archives.

  • Daily Wisdom Telegram Bot ↗
    Python3, REST API, python-telegram-bot

    End-to-end Python development with third-party API integration for automation and notifications.

Courses & certifications

🏆 Achievements & awards

  • Won 3rd prize in VulHunt at New prince college · 2013

    Secured **3rd Prize in VulnHunt** at SPARTANZ 3.0 2K26, a national-level technical symposium in Chennai. A great hands-on cybersecurity experience that strengthened my vulnerability-hunting skills and motivated me to explore more CTFs and bug bounty challenges.

⚽ Extracurricular activities

  • AI & Emerging Technology — Klizer AI Club Programme

    Participated in the Klizer AI Club programme at IIT Madras Research Park in June 2026.

  • Attended UiPath Agent Builders Day Chennai

    Gained insights into AI agents, intelligent automation, and emerging workflow technologies. Explored how AI is transforming businesses and strengthened my interest in AI, automation, and cybersecurity.

🤝 Volunteering

  • ISRO · Explainer · 2026

    Served as an explainer at the ISRO Exhibition at MSEC, presenting Solid Motor Production at SDSC SHAR. It was a valuable experience sharing space technology concepts with students and improving my technical communication skills as a first-year CSE student.

🎯 Hobbies & interests

  • BugHunting
  • OSINT investigation (beginner)
  • portswigger labs
  • OWASP Juice shop labs
  • Programming
  • automation
  • CTF Challenges
  • Exploring AI Technologies
  • Problem-Solving
  • Chess.

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