Jason Kratzer
Staff Security Engineer (Fuzzing) at Mozilla
Asheville, North Carolina, United States
Summary
🤩
Rockstar🎓
Top SchoolJason Kratzer is a Staff Security Engineer specializing in fuzzing with 12 years of security engineering experience, currently advancing Firefox's fuzzing infrastructure at Mozilla from his base in Asheville, NC. He blends deep offensive security background—over a decade performing application, mobile, wireless, and network assessments at Verizon Business—with systems-level engineering to harden complex software. At Mozilla he has contributed to the gecko source tree by extending the Nyx snapshot fuzzing engine, adding JavaScript interfaces, UTF-8 handling, and logging hooks that improve automated vulnerability discovery. Known for turning practical attack techniques into scalable defenses, he pairs hands-on exploit experience with secure development and tooling work. Jason holds an associate degree in Network Security and Computer Forensics and has a track record of shipping durable security features that bridge research and production.
12 years of coding experience
11 years of employment as a software developer
Associate's degree, Network Security and Computer Forensics, Associate's degree, Network Security and Computer Forensics at Pittsburgh Technical Institute
Github Skills (7)
fuzzing10
c-language10
firefox10
cprogramming-language10
dom10
javascript9
webidl9
Programming languages (11)
Github contributions (5)
mozilla/gecko-dev
Mar 2017 - Nov 2022
Read-only Git mirror of the Mercurial gecko repositories at https://hg.mozilla.org. How to contribute: https://firefox-source-docs.mozilla.org/contributing/contribution_quickref.html
Role in this project:
Back-end Developer
Back-end DeveloperContributions:21 commits in 5 years 8 months
Contributions summary:Jason contributed to the Firefox source code by implementing and modifying features related to the Nyx snapshot fuzzing engine. Their work included adding a JavaScript interface for Nyx interaction, integrating UTF8Strings, and exposing a logging mechanism. They also fixed an issue regarding the release log message, demonstrating a focus on maintaining the functionality and logging aspects of the fuzzing framework. These changes are all geared towards enhancing the capabilities of Firefox's fuzzing infrastructure.
repositoriesfirefoxmercurialgit-mirrormozilla
MozillaSecurity/fuzzfetch
Jun 2017 - Dec 2022
Downloader for Firefox/jsshell builds for fuzzing.
Contributions:18 releases, 26 reviews, 112 commits in 5 years 6 months
firefoxdownloaderbuildssecurityfuzzing
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