Gelei Deng
AI Engineer at Quantstamp, Inc.
Singapore
Summary
🤩
Rockstar🎓
Top SchoolGelei Deng is an AI engineer and cybersecurity researcher with a Ph.D. from Nanyang Technological University, currently leading AI security work at Quantstamp and Common Defense. With about five years of experience spanning research roles at NTU and A*STAR to applied engineering and auditing, he blends academic rigor with hands-on product delivery. He created PentestGPT, an open-source, LLM-powered penetration testing tool that has attracted over 8,000 GitHub stars, demonstrating his ability to turn security research into widely used developer tooling. A member of the OpenAI Red Team network and an Anthropic Red Team Bug Bounty winner, he focuses on securing AI systems and automating defensive and offensive security workflows. Based in Singapore, he brings a rare combination of API integration, backend engineering, and vulnerability research expertise to AI security challenges.
5 years of coding experience
6 years of employment as a software developer
Singapore University of Technology and Design (SUTD)Doctor of Philosophy - PhD, Computer Science, Doctor of Philosophy - PhD, Computer Science at Nanyang Technological University Singapore
Github Skills (12)
lm10
penetration-testing10
large-language-models10
python10
command-execution10
llm10
api-design9
restful-api9
rest-api9
api-rest9
it-security8
security8
Programming languages (3)
Github contributions (5)
GreyDGL/PentestGPT
Feb 2023 - Mar 2023
A GPT-empowered penetration testing tool
Role in this project:
Back-end Developer & Security Engineer
Back-end Developer & Security EngineerContributions:10 releases, 28 reviews, 14 commits in 26 days
Contributions summary:Gelei contributed to the development of a penetration testing tool, primarily focused on integrating with the ChatGPT API. They implemented code to extract commands from the API responses and execute them, suggesting a focus on automating tasks. The user also refactored code to use a command execution function and added a custom exception class. Their work demonstrates an understanding of integrating with external APIs and basic security considerations.
large-language-modelsllmpenetration-testingpython
GeleiDeng/GeleiDeng.github.io
Jun 2023 - Feb 2025
Contributions:33 pushes, 1 branch in 1 year 8 months
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