Carsten Schmitz
Founder & CTO at LimeSurvey
Hamburg, Germany
Summary
🤩
Rockstar🎓
Top SchoolCarsten Schmitz is a seasoned founder and CTO with 22 years in software engineering, currently leading LimeSurvey GmbH from Hamburg. He combines hands-on expertise in PHP, jQuery and databases with deep open-source experience, notably contributing database fixes and compatibility improvements to the widely used Yii PHP framework. Previously serving as CEO, he pairs technical leadership with business development skills honed at Hamburg University of Applied Sciences. Carsten is especially strong at solving cross-database issues and maintaining reliable data interactions across MSSQL, PostgreSQL and Active Record patterns. His career blends product vision with pragmatic engineering, keeping LimeSurvey robust and extensible for diverse survey workloads.
21 years of coding experience
12 years of employment as a software developer
Computer Software Engineering, Computer Software Engineering at Hamburg University of Applied Sciences
German, English
Github Skills (12)
yii10
activerecord10
php-framework10
php10
postgresql10
sql10
mssql10
db-schema9
database-schema9
schema9
database-design9
schema-design9
Programming languages (15)
Github contributions (5)
yiisoft/yii
Jun 2012 - Sep 2021
Yii PHP Framework 1.1.x
Role in this project:
Back-end Developer / Database Engineer
Back-end Developer / Database EngineerContributions:1 review, 8 commits, 2 PRs in 9 years 4 months
Contributions summary:Carsten primarily contributed to fixing bugs and improving the compatibility of the Yii PHP Framework, focusing specifically on database interactions. Their work involved correcting issues related to retrieving identity values in Microsoft SQL Server (MSSQL) and addressing problems with Active Record inserts when default values were present. Additionally, the user resolved database session issues with PostgreSQL, demonstrating an understanding of different database systems and their specific implementations.
yiiyii1phpframeworkyii-php-framework
LimeSurvey/LimeSurvey
Jun 2004 - 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.
Contributions:1 release, 192 reviews, 9002 commits in 18 years 10 months
reactmysqlresponsive-designjavascriptphp
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