Web Apps
Web apps that grow with you: clear structure and reusable parts make every new feature a routine job.
Built to fit.
Easy to reshape.
I'm Andreas Schlender, full-stack developer in Mannheim. I build, fix, and speed up the software your business runs on, from database to deployment. It fits how your team already works, and the next developer can pick it up without a map.
Services
For teams that need working software: fast, easy to change, and close to how the work gets done.
AI Integration
AI where it saves your team time, like summarizing documents, sorting incoming requests, or drafting replies. You decide what it's allowed to do, and it can run on your own hardware so your data stays in-house.
Automation
Reports, imports, and hand-offs between tools run on their own, and your team gets those hours back.
Legacy Migration
I move your software to a modern stack step by step, and production keeps running the whole time.
Code Cleanup
When small changes take weeks: I untangle the code, put structure back in place, and development moves at a normal pace again.
Linux Integration
Moving your computers or servers to Linux: I set up the tools your team relies on so daily work keeps running.
Projects
Side projects
Built on my own time, from embedded hardware to game mods.
Buschfunk
Buschfunk brings chats, events, polls, tasks, and knowledge management together in one productivity app for clubs and groups.
- Changes appear instantly for every member, on every device.
- A calm, paper-like interface that's easy to find your way around.
- Works in the browser and as an app.
- Chat built on Matrix, the open messaging standard with end-to-end encryption.
Convex · React · TypeScript · Tailwind
Trident
A visual platform for combining data from multiple sources.
- Workflows that show exactly what happens to your data.
- Checks the data structure before a run, so errors show up early.
- AI that explains, checks, and automates workflows, locally or in the cloud.
C# · Postgres · React · TypeScript · Tailwind
Vantrol
A camper cockpit and control system for battery status, window sensors, lights, and more. All on an e-paper touchscreen.
- Runs things automatically by time or temperature.
- CO₂ monitoring.
- Dimmable lighting for every mood.
- Hardware buttons you can assign to any function.
- Control everything from your phone, through a website served by the device itself.
ESP32 · CAN · C++ · RippleTS
GameNG
A sandbox mod for BeamNG.drive that makes it easy to create multiplayer game modes: tag, penalty races, King of the Hill, or anything else you can imagine.
- Roles, plus triggers that switch a player's role.
- Timers and custom actions.
- Rules that allow or block player actions, such as resetting damage.
Lua · Vue
