Stephan Seidt
Owner at Seidt Business
Berlin, Germany
Summary
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SeniorStephan Seidt is a Berlin-based software founder and owner with 16 years of experience building developer-focused tooling and scalable web platforms, including founding roles at Contentful and Copper. He combines hands-on backend engineering—demonstrated by impactful commits to widely-used projects like contentful.js and ShareJS—with product-driven entrepreneurship through his ventures Seidt Business and Horama. Known for improving SDK flexibility and collaborative-editing reliability, he brings pragmatic attention to API ergonomics and document lifecycle correctness. Equally at home shipping production-grade libraries and launching startups, Stephan pairs a deep technical craft with an operator’s instinct for real-world developer needs.
16 years of coding experience
Github Skills (7)
contentful10
collaborative-editing10
javascript10
sdk10
coffeescript10
document-management10
testing9
Programming languages (17)
Github contributions (5)
contentful/contentful.js
Jun 2013 - Jun 2014
JavaScript library for Contentful's Delivery API (node & browser)
Role in this project:
Back-end Developer
Back-end DeveloperContributions:118 commits, 4 comments, 1 issue in 1 year
Contributions summary:Stephan made several commits focused on enhancing the Contentful JavaScript SDK's core functionality. They added the ability to specify a default hostname, set the Content-Type header, and allow for query options when retrieving content types. The user also improved query object handling and explicitly set ports in URLs. These changes directly improved the library's delivery API and overall flexibility for developers using Contentful.
contentfulapijavascript-librarybrowserjavascript
josephg/ShareJS
Nov 2012 - Feb 2013
Collaborative editing in any app
Role in this project:Back-end Developer
Back-end DeveloperContributions:5 commits in 2 months
Contributions summary:Stephan focused on improving the stability and functionality of the ShareJS collaborative editing application. Their commits primarily addressed issues related to document lifecycle management, specifically handling the opening and closing of documents within the connection. The user added tests to ensure correct behavior and fixed bugs related to reopening documents. The contributions improved the reliability of document state transitions.
reactelectroncollaborative-editingcollaborativetypescript
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