Sebastien Kaul
Founding Engineer at Security Discovery
Hamburg, Germany
Summary
🤩
Rockstar🎓
Top SchoolSebastien Kaul is a founding engineer and technical team lead based in Hamburg with seven years of hands-on experience blending back-end development, DevSecOps, and vulnerability research. As a partner at Security Discovery and founder at autotradelab, he couples leadership with day-to-day engineering, shipping robust server-side features and automation. An active bug bounty hunter on HackerOne and Bugcrowd, he has reported high-impact vulnerabilities to organizations including the U.S. Department of Defense, Mastercard and Epic Games, which informs his secure-by-design approach. His open-source contributions include improving JSON extraction in the widely used ProjectDiscovery/nuclei scanner and hardening filter logic and tests for a Laravel Livewire tables component, demonstrating attention to edge cases and test-driven fixes. Comfortable moving between production code, test automation and security tooling, he brings an operator’s mentality to building reliable systems that anticipate real-world misuse.
7 years of coding experience
Abitur, Abitur at Gymnasium Ohlstedt
German, English, French
Github Skills (16)
json-parser10
json10
jsonp10
php10
go10
vulnerability-detection10
parsing10
laravel10
laravel-mix10
security-scanner10
testing10
datatables4
databases4
yaml4
database4
Programming languages (8)
Github contributions (5)
projectdiscovery/nuclei
Jul 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:
Back-end Developer
Back-end DeveloperContributions:3 reviews, 9 commits, 1 PR in 2 days
Contributions summary:Sebastien primarily contributed to the development of the `nuclei` vulnerability scanner by adding and improving the JSON extractor functionality. This involved modifying code related to extracting data from JSON responses, including adding new features and fixing tests. The user's work demonstrates a focus on enhancing the capabilities of the tool to parse and utilize JSON data within the security scanning process. This involved modifying existing code, adding new tests, and making code tidy.
scannersecurity-toolsnuclei-engineattack-surfacesecurity
rappasoft/laravel-livewire-tables
Dec 2022 - Dec 2022
A dynamic table component for Laravel Livewire
Role in this project:Back-end Developer & QA Engineer / Test Automation Engineer
Back-end Developer & QA Engineer / Test Automation EngineerContributions:7 commits, 4 PRs, 6 comments in 1 day
Contributions summary:Sebastien primarily focused on improving the robustness and reliability of the Laravel Livewire Tables component. They addressed potential null pointer exceptions in filter logic and added tests to prevent errors when invalid filter keys are used. Their contributions involved modifying existing code to handle edge cases and writing new tests to ensure the stability of the filtering functionality. The user demonstrated a strong understanding of the codebase by making targeted fixes and adding related tests.
datatableslivewirephplaravel-livewirelivewire-tables
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.