Patrick Teichmann
Software Developer at LimeSurvey
Hamburg, Germany
Summary
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RockstarPatrick Teichmann is a software developer based in Hamburg, Germany with seven years of hands-on experience building and hardening web applications. He contributes to the prominent open-source LimeSurvey project, focusing on PHP back-end work that fixes security issues like persistent XSS, restores compatibility (e.g., IE11 file uploads), and improves token management and data entry flows. At LimeSurvey he combines steady bug triage with feature implementation, showing a pragmatic approach to balancing user-facing reliability and backend maintainability. Patrick’s work reveals attention to security and legacy compatibility—traits that help sustain long-running open-source platforms.
7 years of coding experience
Github Skills (6)
php10
security9
mysql7
html6
javascript6
phpunit6
Programming languages (2)
Github contributions (5)
LimeSurvey/LimeSurvey
Apr 2019 - Jan 2023
🔥 LimeSurvey – A powerful, open-source survey platform. A free alternative to SurveyMonkey, Typeform, Qualtrics, and Google Forms, making it simple to create online surveys and forms with unmatched flexibility.
Role in this project:
Back-end Developer
Back-end DeveloperContributions:102 reviews, 536 commits, 123 PRs in 3 years 9 months
Contributions summary:Patrick primarily focused on bug fixes and feature implementations within the LimeSurvey project's PHP codebase. They addressed issues related to persistent XSS vulnerabilities in menu entries and file upload functionality in Internet Explorer 11. Moreover, the user made improvements to the token management system, including resending functionality, and resolved issues with the data entry system, improving the overall user experience.
reactmysqlresponsive-designjavascriptphp
LimeSurvey/bootstrap-slider
Dec 2022 - Dec 2022
A slider control adapted for Bootstrap 5
Contributions:1 push in 1 day
bootstrap4adaptedpjaxslidersslider
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