Cooper Quintin
Senior Staff Technologist at Electronic Frontier Foundation
San Francisco, California, United States
Summary
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RockstarCooper Quintin is a senior public interest technologist and security researcher with 17 years of experience, serving as Senior Staff Technologist at the Electronic Frontier Foundation and a Research Fellow at Citizen Lab. He builds pragmatic tooling and investigations that blend full‑stack engineering with threat analysis—contributing UI and functionality improvements to Privacy Badger and architecting backend systems for cellular network analysis in projects like crocodilehunter. Cooper is a seasoned presenter and trainer, having spoken at Black Hat, DEFCON and other conferences and delivered security trainings for activists and vulnerable communities worldwide. His research has uncovered state‑level APT activity (e.g., Dark Caracal) and informed mainstream reporting in outlets such as The New York Times and Reuters. Based in San Francisco, he pairs deep technical craftsmanship with public-interest impact, often surfacing privacy harms that are easy to miss until actively probed.
17 years of coding experience
4 years of employment as a software developer
Github Skills (19)
apim10
javascript10
python10
browser-extension10
user-interface10
chrome-extension10
api10
database-design10
opera-extension10
webextension10
cookie10
lte9
css9
raspberry-pi9
html9
Programming languages (12)
Github contributions (5)
EFForg/crocodilehunter
Sep 2018 - Dec 2022
Taking one back for Steve Irwin (๑•̀ㅂ•́)و
Role in this project:
Back-end & System Architect
Back-end & System ArchitectContributions:13 reviews, 215 commits, 18 PRs in 4 years 3 months
Contributions summary:Cooper primarily worked on developing the backend infrastructure for a cellular network analysis tool. They implemented an interface to the wigle.net API, enabling the collection of cell tower data. The user also created a system for the integration of srsLTE to find and track stingrays. Further, they added a database for storing cell tower data. They also worked on a web UI.
lteraspberry-pibladerfwiglesteve
EFForg/privacybadger
Dec 2013 - May 2017
Privacy Badger is a browser extension that automatically learns to block invisible trackers.
Role in this project:Full-stack Developer
Full-stack DeveloperContributions:940 commits, 331 PRs, 426 pushes in 3 years 5 months
Contributions summary:Cooper primarily focused on improving the user interface and functionality of a browser extension designed to block online trackers. They fixed bugs related to cookie handling and the display of trackers in the popup, and also added code for domain exception handling, as well as implementing features for blocking and unblocking domains. Additionally, the user contributed to the styling of the popup and other UI elements, improving the user experience.
firefoxbrowserprivacyjavascriptwebextension
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