About
Efadul Islam is an Application Security Engineer specializing in web and application penetration testing, vulnerability assessment, and offensive security. As a long-time CTF competitor with Red_Rebels, he has earned numerous national and international accolades, including Champion of MIST Leetcon 2023 and National Champion at NSDA 2022. Efadul has extensive hands-on experience across red teaming, blue teaming, digital forensics, and exploit development. With a strong foundation in computer science from Daffodil International University and certifications such as CAP, he is committed to advancing secure software development and contributing to innovative cybersecurity solutions.
Experience
Junior Application Security Engineer
Kerberos, Dhaka
CTF Player
Red_Rebels
Security Researcher
Yogosha
Achievements
Champion
MIST Leetcon 2023
National Champion
Cyber Security (NSDA) 2022
Cyber Security Competitor
WorldSkills 2022 Special Edition | Goyang, Korea 2022 SE
1st Runner-up
The World Telecommunication and Information Society Hackathon 2025 (National Final), organized by the Telecommunication Division & BTRC at MIST
1st Runner-up
IUT CTF 2024
Finalist
Phoenix Summit 2024
Divisional Champion & National Finalist
Cyber Security (NSDA) 2024
2nd Runner-up
BUET CTF Fest 2023
4th Runner-up
SUST SWE CTF 2023
1st Runner-up
DIU CSE_FEST CTF 2023
3rd Runner-up
IEEE CTF Bootcamp 2021
3rd Runner-up
Flag Hunt on-site CTF 2022
Finalist
Hackerone Bughunt 2023
9th position
Phoenix CTF 2025
14th Postition
DawgCTF 2023 (Among 408 International Teams)
27th Postition
CyberGon CTF (Among 900 International Teams)
Skills
Penetration Testing & Vulnerability Assessment
Web, Networking, API
CTF
Cryptography, Steganography, Web, OSINT, Networking, Digital Forensics and Boot to Root Machines
Blue Teaming
Log file analyzing, PCAP analyzing Wireshark, Volatility, Autopsy, Wazuh
Red Teaming
Exploitation, Privilege escalation, Pivoting, Persistence, and Defense evasion techniques
Web & Scripting Language
HTML, CSS, JavaScript, and Shell Scripting
Programming Language
C, Java and Python
Operating System
Microsoft Windows, Kali Linux and Different Linux distros
Education
Bachelor of Science
Computer Science and Engineering
Daffodil International University
Certification
CCEP
Certified Cybersecuirty Educator Professional
CAP
Certified AppSec Practitioner
eJPT
Certified Junior Penetration Tester
Courses & Training
TCM Security
Practical Ethical Hacking, Linux Privilege Escalation, Windows Privilege Escalation
TryHackMe
CompTIA Pentest+, Jr Penetration Tester Path
Nahamcon
Nahamsec Bug Bounty Course
Udemy
Intro to Bug Bounty Hunting and Web Application Hacking, Linux Bash Scripting
