Gia Bui
Security Engineer at Calif.IO
Ho Chi Minh City, Vietnam
Summary
👤
Senior🎓
Top SchoolGia Bui is a Security Engineer based in Ho Chi Minh City with nine years of hands-on experience in offensive and defensive security across startups and enterprise teams. She has focused on red teaming, vulnerability scanning, and backend tooling—contributing bug fixes and performance improvements to well-known open-source projects like ProjectDiscovery’s nuclei and dnsx. At VNG she progressed from collaborator to Red Team engineer, and now helps defend critical digital infrastructure at Calif.IO. Beyond scanning logic and DNS optimizations, she brings practical mobile development experience from building high-usage consumer apps, which gives her a pragmatic perspective on securing real-world products.
9 years of coding experience
5 years of employment as a software developer
Bachelor of Engineering (Honor Program), Information Security, 3.32 / 4, Bachelor of Engineering (Honor Program), Information Security, 3.32 / 4 at University of Information Technology
Stackoverflow
21reputation
64reached
0answers
1question
Github Skills (13)
go10
security-scanner10
cli9
vulnerability-detection9
debug8
debugging8
data-structure7
data-structures7
algorithm7
algorithms7
wcf6
php6
dns5
Programming languages (11)
Github contributions (5)
projectdiscovery/nuclei
Apr 2021 - Aug 2021
Nuclei is a fast, customizable vulnerability scanner powered by the global security community and built on a simple YAML-based DSL, enabling collaboration to tackle trending vulnerabilities on the internet. It helps you find vulnerabilities in your applications, APIs, networks, DNS, and cloud configurations.
Role in this project:
Security Engineer
Security EngineerContributions:2 reviews, 5 commits, 2 PRs in 4 months
Contributions summary:Gia contributed to the project by fixing issues related to setting user agents in HTTP templates and correcting typos, indicating involvement in improving the functionality and stability of the vulnerability scanner. The user added a debug function for output, and later renamed it, which suggests a focus on testing and debugging the application. This work aligns with the project's goal of vulnerability detection and security scanning.
scannersecurity-toolsnuclei-engineattack-surfacesecurity
projectdiscovery/dnsx
Sep 2021 - Sep 2021
dnsx is a fast and multi-purpose DNS toolkit allow to run multiple DNS queries of your choice with a list of user-supplied resolvers.
Role in this project:Backend Developer
Backend DeveloperContributions:3 reviews, 10 commits, 1 PR in 4 days
Contributions summary:Gia primarily focused on improving the performance and fixing bugs within the `dnsx` project's core logic. They addressed issues related to filtering wildcard subdomains, including fixing false positives and optimizing the related code. Furthermore, the user contributed to resolving issues in printing results and reducing DNS requests by caching. The user's contributions centered around refining the DNS resolution and wildcard filtering functionalities.
dns-clientdnsdns-resolutiondns-bruteforcerwildcard-filtering
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