Cyber Security Researcher

Rahul Rajendran

Cyber Security Researcher Penetration Tester Bug Bounty Hunter CTF Team Lead
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Cyber Security Researcher and Team Lead with a deep passion for vulnerability research, penetration testing, bug bounty hunting, and cybersecurity education.

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About

Highly skilled Cyber Security Researcher and Team Lead with a deep passion for vulnerability research and penetration testing. Proven expertise in Bug Bounty hunting, with official recognition from NASA. Extensive experience in leading and managing high-performing CTF teams. Currently pursuing advanced certifications to bridge the gap between academic knowledge and industry-standard security practices.

  • Cyber Security
  • Vulnerability Research
  • Penetration Testing
  • Bug Bounty
  • CTF
Open Source

Tools I Built.

01
↗
HackEregin
Universal encoding and cipher detection tool built for CTF players, bug bounty hunters, and cybersecurity researchers. Automatically detects and decodes multiple encoding formats and ciphers.
Python Base64 / Hex / ROT Hash Detection Morse Code CTF Bug Bounty
r4huL-cyber/HackEregin Python
02
↗
Spectator
Advanced in-browser API & endpoint intelligence tool. Passive traffic monitoring, automated endpoint discovery, security scanning, request replaying, WebSocket monitoring, and OpenAPI 3.0 export — all in a Chrome Side Panel.
Chrome Extension React + TypeScript API Recon Security Scanner WebSocket Monitor OpenAPI Export
r4huL-cyber/Spectator TypeScript
03
↗
Jsrecon
CLI tool that automates JS attack-surface recon for bug bounty targets. Collects first-party JavaScript, downloads it, and extracts endpoints, IDOR candidates, auth patterns, DOM XSS sinks, GraphQL operations, hardcoded secrets, and more.
Python CLI JS Recon IDOR Detection XSS Sinks Bug Bounty
r4huL-cyber/Jsrecon Python
Experience

Field
Record.

CTF & Bug Bounty

CTF & Bug Bounty Team Lead

Team Leadership & Security Education
  • Led and directed the CTF and Bug Bounty team, setting strategic direction and objectives.
  • Educated and trained students on cybersecurity fundamentals, fostering next-generation talent.
  • Developed training programs around Bug Bounty concepts and CTF strategies.
  • Managed and executed multiple CTF events from planning through completion.
  • Architected and deployed secure backend environments for CTF events using Google Cloud Platform and Docker.
Bug Bounty

NASA Responsible Disclosure

NASA — Official Recognition
  • Successfully identified and reported two P5 (Informational / Low) vulnerabilities through NASA's Responsible Disclosure Program.
  • Recognized officially by NASA for contribution to their security disclosure program.
Achievements

Recognition.

NASA Responsible Disclosure

Official
NASA
Recognition

Successfully identified and reported two P5 (Informational / Low) vulnerabilities through NASA's Responsible Disclosure Program. Recognized officially by NASA for responsible and ethical security research.

NASA
Competition Results
1st
↗
Place
Carnival CTF
1st
↗
Place
Count Flagula CTF
1st
↗
Place
RDR-based CTF
2nd
↗
Place
Offenso Hackers Academy Trivandrum CTF
3rd
Place
CET Kallooppara College CTF
6th
Place
XORION CTF — Redteam Hackers Academy
1st
Place
Bug Hunting — HGEMA EXPLOIT
Event Management

CTF Events
Deployed.

Successfully managed backend infrastructure and challenge creation for multiple CTF events, deploying secure environments on Google Cloud Platform using Docker.

Event 01
BELOVED
CTF Challenge Design & Infrastructure
Event 02
Alice in Borderland
OSINT Themed CTF
Event 03
Invento
CTF Challenge Design & Infrastructure
Event 04
Monopoly
CTF Challenge Design & Infrastructure
Certifications

Credentials.

CompTIA PenTest+
CompTIA
Certified
Advanced Diploma in Information Security
Offenso Hackers Academy
Certified
Certified Penetration Tester
Redteam Hacker Academy
Certified
Certified Cybersecurity Educator Professional
CCEP
Certified

Let's Secure
the Future.

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