I connect your systems, automate repetitive work, and turn your ideas into applications your team can rely on.
I’m Daniel, a senior software engineer based in Germany. I’ve been building production software since 2006. You’ll work directly with me, from the first idea to launch and ongoing support.
I build MCP servers that let your team ask Claude or ChatGPT questions about your business data. Search, analytics and reporting connect to your own systems through tools with clearly defined OAuth permissions.
I created this app for a sports club in Leipzig. Members can see who’s coming to training, check upcoming matchdays and find club information in one place. It’s my own product, which I’ve taken from planning and design through development, deployment and ongoing operation.
Today, businesses rely on different systems for payments, customer relationships, invoicing and communication. I built this demo to show what happens when a connection fails: deliveries are retried, duplicates prevented and unresolved requests kept visible. Try it yourself.
I built Fiona to pick up when I can’t. She answers project questions, helps new clients find their next step, and books an introductory call with me. Try a conversation in English or German.
I wanted a workspace you could step into. In Kepler, you can explore an orbital lounge, organize your week on a gigantic whiteboard, all in your browser, without an installation or account. Leave Earth behind for a moment and enter the station.
I take responsibility for what I build. That means thinking through the problem with you, explaining technical decisions clearly, and choosing an approach that makes the software useful, reliable and pleasant to use.
I’ve built and maintained enterprise applications for a regional branch of Europe’s largest automobile club.
My portfolio showcases a selection of my work, from a custom-built sports club app to interactive demos of AI integrations and reliable workflows between business systems.
You’ll work directly with me, in English or German, with the same person responsible for architecture, development and ongoing operation.
Feedback from an Upwork client
“Daniel is an excellent service provider. He is extremely diligent and will deliver on budget and before time.”
I connect Claude and ChatGPT to your business data, automate the handoffs between your systems, and build applications your team can rely on. I also create interactive 3D environments you can explore in your browser. We’ll start with what you want to achieve and choose the technology that gets you there.
| Does this sound familiar? | How I can help |
|---|---|
| “We know we could work smarter. We’re just not sure where to start with AI.” | AI Audit We’ll look at your workflows and decide what’s worth building first. |
| “Getting an answer means searching through several systems or asking a colleague.” | Ask Your Own Data Ask questions about your business in plain language, using data from your own systems. |
| “We keep copying data between tools and chasing updates by hand.” | Custom Software & Automation I connect your tools and automate the handoffs that slow your team down. |
| “We have an idea for an app and need someone to take it through to launch.” | Custom Software & Automation I work with you from the first useful version through launch and ongoing operation. |
Wondering where AI could make a real difference in your business? We’ll look at your workflows together and work out what’s worth building.
Give your team a way to ask Claude or ChatGPT about your own data, in plain language and with access controls in place.
Have a workflow to automate or an idea that needs its own software? Let’s work out what you need and build it together, with AI where it helps, without it where it doesn’t.
We’ll agree on the scope, milestones and price together before we start.
We’ll look at how you work, what’s getting in the way and what you want to achieve. Together, we’ll agree on a sensible first step and its scope.
freeWe’ll agree on the prototype’s scope and fee before I start. You can try a working version and get my honest assessment of the options and trade-offs before deciding how to move forward.
scope and fee agreed upfrontYou’ll see your software take shape through daily updates and weekly presentations. Try the working versions and tell me what you think. I’ll refine the details, flag problems early and keep you involved in decisions.
continuousI’ll deploy your software and walk you through the source code and documentation. Support after launch is included. You’ll have everything you need to keep building on it, with me or another developer.
support includedA rough idea is enough to start a conversation. Share a few details and pick a time that works for you. I’ll confirm within two hours, and we can work out whether I’m the right person to help.
Prefer talking? My voice agent takes the call right now, in English or German, qualifies the project and books the slot for you.
Send me a short message on Upwork about what you want to build or improve. A rough idea is enough. I’ll reply with questions or a suggested next step. Before a contract starts, we’ll keep project conversations and scheduling there.