Custom Web Apps
Built to grow: clean structure and reusable parts mean new features take days, not weeks.
One developer
for your entire stack
I'm Andreas Schlender, a full-stack developer in Mannheim. New features when the business asks, fixes when something breaks, and more speed where things crawl. From the interface to the database, changes stay routine.
Services
For teams that need software that works today and can change tomorrow.
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
Your current software keeps running while I migrate it piece by piece. New features ship along the way, so nothing stops while the work happens.
Code Cleanup
When small changes take weeks, I untangle the code, restore structure, and get development back to a normal pace.
Linux Integration
I move your team's computers or servers to Linux and set up the tools they rely 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
