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Built with people.

Security is a team sport. The teams I co-founded, the club I led, the events I organized and the rooms I learn in.

01

Flaggers United

Co-Founder · since Apr 2024

A CTF team and learning community from Jerusalem College of Engineering, Chennai. I co-founded it to give students a place to learn security by competing: we design challenges, play international CTFs together and help beginners get started.

  • Teach CTF and security concepts through workshops, videos and posts
  • Design and host CTF challenges and events
  • Guide beginners with roadmaps, mentorship and Q&A
  • Partner with colleges to grow participation
Team profile on CTFtime (opens in a new tab)
Founded
Apr 2024
Public members
13
CTFtime events
38
India rank (2026)
#32

Recent team results

  • ISACA Trivandrum Chapter CTF 2026Sep 20261st
  • Hack With Jolu 202620261st
  • CyberHaunt CTFNov 20251st
  • CipherCase 24-hour CTF20262nd
  • KingSlayers CTF16 Apr 20262nd
  • TEXUS'26 CTFFeb 20262nd
  • TEXUS'26 Bug BountyFeb 20262nd
  • RAGNAROK QUEST CTF · ZYVERSE 2K2513 Sep 20252nd
  • ARCADIA 4th State-Level CTF8 Aug 20252nd
  • Loyola College CTF20263rd
  • DEF CON Chennai CTFApr 2026#12
  • Kaalchakra 2026 CTF FinalsApr 2026Top 15
  • HackathonX Semi-FinalsJul 20255th
  • Pathom CTFNov 20255th
  • Final Trace CTFNov 20256th

02

CyberNexus Club

The goal was more than a club: a launchpad where members learn real skills, get mentored by alumni and seniors, and run professional-level CTFs. It grew from Linux and networking basics to internal CTFs to inter-college events.

  • PresidentAug 2025 – Aug 2026
  • Club BuilderOct 2024 – Aug 2025

10+

events organized

Organized12 Aug 2026Jerusalem College of Engineering, Chennai

DOOMS CTF 2026

My last inter-college CTF as President. The juniors ran the execution on limited infrastructure, and Flaggers United helped it reach students across Tamil Nadu.

  • 75+ participants
  • 10 colleges
  • Teams of 3
  • ₹10,000 prize pool
  • Sponsored by IEI
Organising team at Jerusalem College of Engineering for DOOMS CTF 2026
Participants at DOOMS CTF 2026
Guests and faculty at DOOMS CTF 2026

Organized24 Jan 2026JCE Auditorium, Chennai

SPYIREX CTF 2026

An inter-college CTF by the Cyber Nexus Club with the Department of Cyber Security and IE(I), across cryptography, web security, reverse engineering, pwn and forensics. Challenges were built by Flaggers United juniors.

  • Teams of 1–3
  • ₹10,000 prize pool
  • 4-hour CTF
Cyber Nexus Club organising team at SPYIREX CTF 2026
Participants and faculty at SPYIREX CTF in the JCE auditorium

OrganizedOct 2025Jerusalem College of Engineering

Escape Room 2.0

A technical quiz filtered the field to the top 40 teams, who then worked through forensics, steganography, cryptography and web challenges. This time I stepped back and handed the website and challenges to the juniors.

  • 110+ participants
  • Top 40 teams
  • Juniors ran the build
Escape Room 2.0 participants with the organising team

Organized24 Sep 2025Cyber Nexus Club, JCE

Spark: The Origin

Phase one of the Cyber Nexus programme. I gave the talk “How to find your cybersecurity role from your CTF role”, mapping CTF domains to real jobs: reversing to malware analysis, web to pentesting, forensics and OSINT to specialist tracks.

Subadevan presenting at Spark: The Origin, Cyber Nexus Club
Poster for Spark: The Origin seminar, 24 September 2025

OrganizedSep 2025Jerusalem College of Engineering

Playful HnH & Red HnH

Cyber Nexus Club's first event of the year: a phone-based flag hunt in the auditorium, then a real Hack-n-Hunt across web, forensics and steganography the next day.

OrganizedJun 2025Jerusalem College of Engineering

Flaggers United Showcase

A Saturday showcase where students present the tools and projects they build, to break the gap between seniors and juniors and show that building things isn't rocket science.

OrganizedMay 2025

Cybersecurity workshop for school leavers

A 4-hour hands-on workshop for students who had just finished 12th grade: Linux basics, cryptography and password cracking.

Running a cybersecurity workshop for students who just finished 12th grade

03

Rooms I learn in

Conferences, meet-ups and workshops I've attended.

  1. Sep 2026

    Secure AI Summit · ISACA Trivandrum Chapter

    Thiruvananthapuram

    Attended alongside the ISACA CTF, where Flaggers United took first prize.

  2. 26 Sep 2026

    CSA Tamil Nadu Chapter workshop

    Chennai

    Sessions on AI in cybersecurity, agentic AI SOCs and AI-driven SIEM.

  3. Apr 2026

    DEF CON Chennai

    Zoho, Chennai

    Two days of talks and conversations, then the CTF by TamilCTF, where Flaggers United placed #12.

  4. Jul 2025

    DEF CON Chennai meet-up

    Zoho, Chennai

    Talks on V8 internals, sandboxing and 0-days, plus a blue-team session on process injection and threat hunting.

  5. May 2025

    CSEC 2025 · Cybersecurity Expo and Conference

    Chennai

    Panels on AI in cybersecurity and compliance-as-a-service, and meeting people from the Chennai security scene.

  6. May 2025

    null Chennai × OWASP Chennai meet-up

    YuniQ, Chennai

    Talks on blockchain security, then a CTF where Flaggers United finished in the top three.

Other communities

  • Campus Ambassador, RootecstakNov 2023 – present

    Community development and outreach.

  • Co-Founder, MTS CommunityOct 2019 – present

    A computer science community started in school.

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