Freelancer profile translated to English.
Back to original languageAbout Kai
I have been developing websites, portals, and digital platforms for over 20 years – personally, technically sound, and with a genuine interest in long-term solutions.
Behind Lehmann Internet Services is me, Kai Lehmann, as a sole developer. This means for you: You speak directly with the person implementing your project – not with changing project teams or agency detours.
My focus is on individual web applications, CMS projects (Contao, django CMS), portals with customer areas, interfaces, and platforms for SMEs, NPOs, and agencies.
I think not only in code, but in structures: maintainable, performant, secure, and built in such a way that you can still develop your project further in 5 years.
I use modern AI tools specifically to plan projects more efficiently, prototype faster, and test better – the responsibility for architecture and quality remains in human hands.
Web development since 2005 · 100+ projects ·
Partner of nord.digital
German
Native or bilingual
Remote only
Primarily works remotely
Experience
- schweizerspiegelschweizerspiegel.chJanuary 2024 - Today (2 years and 5 months)Digital archive for 564 historical magazine issuesFor the project schweizerspiegel.ch, I developed a complete digital archive of the Swiss culture magazine "Schweizer Spiegel" – all 564 issues from 1925 to 1972 are fully searchable and accessible online.Technically implemented with Contao CMS, complemented by a custom-developed PDF crawler that automatically indexes and makes historical documents searchable. The platform combines classic CMS strengths with a tailor-made archive solution – including full-text search, monthly navigation, and a modern reading interface.The result: A publicly accessible cultural archive that makes 50 years of forgotten Swiss history experienceable again – just in time for the magazine's 100th anniversary.
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