Freelance Software & Web
I build reliable software and websites that work.
Independent software developer and web designer. I help companies and founders turn ideas into well-engineered applications, custom integrations, and fast, modern websites — end to end.
What I do
Services built around what your project actually needs
From a single feature to a complete product or website — clear scope, honest estimates, and code you can keep building on.
Software Development
Custom applications, APIs and integrations engineered to fit your processes — not the other way around.
- Web apps & backends (.NET / C#)
- REST APIs & system integrations
- Automation & internal tooling
Website Design
Fast, modern, accessible websites — designed and built bespoke, with a CMS your team can actually use.
- Design & front-end development
- Umbraco CMS builds
- Performance, SEO & accessibility
Technical Consulting
A second pair of eyes on architecture, delivery and the tricky decisions — so you build the right thing once.
- Architecture & code review
- Cloud & deployment (Docker / CI)
- Technical guidance for founders
Tools I work with
Website design · live demos
Full website concepts you can click through
Four complete, editable website templates I designed and built on Umbraco — each with its own distinct design language, from a light SaaS look to a heavy industrial one. Open any of them live.
View live demo
Helios IT
Managed IT & Cloud
View live demo
Lena Hartmann
Brand & Web Designer
View live demo
Nordfracht Logistik
Freight · Warehousing · Customs
View live demo
Meridian Industrieanlagen
Plant Engineering & Automation
View live demo
Summit Roofing
Roofing · Cladding · Flat Roofs
Each demo is a fictional company, built to showcase design & Umbraco development.
Selected work
A few things I've built
Open source, client work and side projects — happy to walk you through the details and the results on a call.
OpenTrafficDB
A self-hosted platform for ingesting, storing and serving live traffic data — the data backbone behind a full routing and navigation stack.
View project
SharpAI
A .NET 9 inference server that runs LLMs and speech-to-text locally behind an OpenAI-compatible API — a drop-in replacement you fully control.
View project
ZeroVDI
A lightweight ASP.NET RDP Gateway that exposes Remote Desktop services safely, with a workspace feed the native Windows Remote Desktop app can subscribe to.
View project
Evora — AI Health Companion
A native iOS health app that understands meals from a photo, reads Apple Health data, and turns it into clear, personal guidance — backed by a .NET API.
View project
Paperless-AI
An AI extension for Paperless-ngx that adds automatic classification, smart tagging and RAG-powered semantic search and chat over your whole document archive.
View project
Tudora
A full-stack productivity app: a native iOS client paired with a .NET 10 API, wired end to end with Apple and Azure services.
View projectAbout
Hi, I'm Maximilian Kenfenheuer
I’m a freelance software developer and web designer. I like problems that sit between good engineering and good design — where the code has to be solid and the result has to feel effortless to use.
I work directly with the people I build for: no layers, no hand-offs, just clear communication and steady delivery. Whether it’s a full application, an integration, or a website, you get something maintainable that you own.
Have a project in mind?
Tell me what you're trying to build. I'll come back with honest thoughts on scope, approach and what it would take.