Aarushi Koolwal

Aarushi Koolwal

Security Engineer, PhonePe | BlackHat Speaker | AppSec, Vulnerability Management | BFSI Security

PhonePe

About Me

I’m an Application Security Engineer at PhonePe, where I assess web, mobile, and API systems, lead threat modelling and security design reviews, and run secure code reviews across Java, Python, and JavaScript codebases. A big part of my work is triage — figuring out which findings are genuinely exploitable and helping engineering teams fix those first.

I started in cyber threat intelligence at CloudSEK, tracking ransomware groups, phishing campaigns, and criminal underground forums for 40+ clients, then moved into third-party risk and attack surface management before transitioning into application security. That path gives me an unusual vantage point: I’ve seen how attackers actually operate, so I test applications the way they would.

Beyond my day-to-day work, I’m an active speaker and panel moderator at conferences like Black Hat MEA, BSides, and c0c0n, and I contribute to security communities including Null, WiCyS, CSA, InfoSec Girls, and The Hackers Meetup.

Interests
  • Application Security
  • Threat Modeling
  • Penetration Testing
  • Vulnerability Management
  • Payment & Third-Party Security
  • Cyber Threat Intelligence
  • AI Security
Education
  • B.Tech. in CSE — Specialisation in Cyber Security & Digital Forensics, 2023

    VIT Bhopal

  • High School, PCM, 2019

    St. Raphael's School, Indore

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