00 / Web apps · SaaS · MVP
A web app, also called a web application, runs in the browser like a website. On top of that come accounts, roles and data that change every day. We develop SaaS products, MVPs and internal tools, from Duisburg for businesses all over Germany. We run three platforms of our own: Zularis, SnackUp and Bitwise.
01 / What we build
For each kind, a project where it runs today.
One piece of software, many customers, each with their own login. Vehicle registration services (Zulassungsdienste) work with Zularis this way, restaurants with SnackUp. We built both and run them ourselves.
View Zularis ↗The first version of your product idea that real users work with. What they report decides the next sprint. How we do this with our own products is further down.
MVP and SaaS ↓Software only your team sees. At BSB-Akademie the office enters callers itself, registers groups and sends out the certificates of attendance in one click.
View BSB-Akademie ↗In Zularis, owners and staff have different rights. The registration service’s customer needs no account: with a code and the license plate they see on a status page how far their case has got.
If there is an official API, we use it. Zularis sends text messages through Brevo and WhatsApp messages through Meta. SnackUp takes payments through Stripe, PayPal and Klarna.
In the evening Zularis creates the list for the registration office as a PDF, with the seven columns the office needs. Before, someone filled in a nine-column Excel template by hand.
02 / References
One client project and four in-house products. We run our own products ourselves, so we also know the time after go-live. Each case study shows what was built and what changed in day-to-day operations.
In-house product · Industry software
Zularis · Industry CRM / SaaS
CRM for vehicle registration services. The license plate leads to the case, and the customer gets a text, WhatsApp message or email when it’s ready for pickup.
Estimated by the owner of the vehicle registration service in Duisburg-Hamborn, where Zularis has been running since May 2026.
Result Eleven case types, from registration to change of owner. No outages since the start on May 10, 2026, as of October 7, 2026.
Client project · Professional training
BSB-Akademie · Seminar platform
For BSB-Akademie in Monheim: seminars, registration and the admin work that follows, in one system.
The academy’s own site has been online since October 2026. It manages registrations, participants and certificates in the same system.
Result At the end of a seminar day, participants rate it via QR code. Newsletters and group emails go out from the same system.
In-house product · Education
Bitwise · Learning platform / EdTech
Learning platform for IT specialist apprentices: quiz battles, an exam simulator with AI grading, flashcards.
An in-house product of Zeasy Software, built for the AP1 exam and developed further since.
Result Every question has a button for reports. 210 of them were fixed within 24 hours.
In-house product · Restaurants
SnackUp · Restaurant ordering system
Ordering system for restaurants: an ordering page with the menu, plus a device with a receipt printer in the kitchen.
A digital order flow for restaurants, built and run by Zeasy Software. Pictured: the ordering page of Rehana in Duisburg.
Result Every device in the kitchen checks in every 15 minutes. If the signal stops, we call the owner.
In-house product · Railway operations
Bremshelfer · Specialist app / offline-first
App for train drivers to calculate brake percentage under Ril 915, with a formula reference and multiple traction, fully usable offline.
Free on the Play Store. A train driver checked the results against his own calculations during development.
Result Deliberately not a web app: out on the track there is often no signal. The calculation and the formula collection live on the device.
03 / Structure
Every web app has three layers: the interface, the rules behind it and the data. Around them come the admin area, tests and operations. Which technology goes into which layer depends on who uses the app and who runs it later.
Zularis gets by without a large frontend framework, so it loads fast even on basic office computers. In Bitwise, everyone in the room sees the same question in the same second. That takes React and a live connection over Socket.IO.
The first question for the data model is: who may see what? In Zularis each registration service sees only its own cases. Next to the tenant isolation sits a test that checks exactly that.
Every case, every seminar, every order gets a fixed place, and an audit log records who changed what. The data from your current spreadsheet moves over with it.
What changes often, you maintain yourself. BSB-Akademie maintains seminars, dates and registrations in its own admin, with an illustrated guide right in the system.
The seminar management at BSB-Akademie comes with more than 1,600 automated tests and click-throughs in the browser, at desktop and phone size. At Bitwise, every change went live only after the tests had passed.
Every app we run is hooked up to monitoring with an alert that comes straight to us. Backups run daily, and before sign-off we restore one once as a test.
Maintenance and operations →04 / MVP and SaaS
Zularis, SnackUp and Bitwise are our own products. Each started small. What we learned along the way applies to your MVP too.
Bitwise began as a prototype for a single exam, tested by trainees in a training department. In the first week more than 200 users came, without advertising. We worked through what they reported while usage was at its peak.
View Bitwise ↗We first tested SnackUp with two restaurants. The last tests we ran ourselves, with real orders. It has been live since August 13, 2025.
View SnackUp ↗All restaurants run on the same system, which recognizes from the address which one is meant. That is why a new restaurant is usually online in two to three days.
New versions of SnackUp go to one device first, then to all. That way a bug shows up before it reaches every restaurant.
05 / Where you fit
Not every project needs accounts and roles, and some industries have their own page.
You want to be found and get inquiries, and nobody needs an account. Then a website is the right thing.
Web design →Whether off-the-shelf software is enough and when your own pays off is covered on the custom software page. It also lists the industries we have built for.
Custom software →For seminar providers and academies, a separate page shows what goes into a seminar management system.
Seminar management →Then take Zularis first. What we build for registration services beyond that is on its own page.
Software for registration services →Sorting emails, reading documents, routing tickets: that belongs to AI automation.
AI automation →If the software has to work without a signal, we build an app for the device. Bremshelfer does the calculation for train drivers on an Android device.
View Bremshelfer ↗06 / What it costs
We bill by the hour, and how many hours it takes depends on the scope. A platform the size of Zularis costs from €45k. For your project, the calculator on the contact page gives you a cost estimate: four questions, no contact details.
An MVP costs less because it does less. What goes into the first version we set down in the specification, and you see the price in the quote before anything is built. You pay in stages, 25% up front per stage.
What it’s about, how big, how demanding, how urgent. No obligation and no contact details. If you send an inquiry afterwards, you don’t type anything twice.
Get a cost estimateEvery payment comes after a sign-off. You can step out between any two milestones.
07 / How it works
We build in one-week sprints. The steps before that settle what the app has to do and what it costs.
Before we build, we spend two days with you and watch how the work gets done today. That shows us who needs which data and where it lives now.
Data model, roles, APIs and acceptance criteria go into it. You approve it, and only then do we build.
Every week ends with a demo. In between you see the current state on the test system.
Once the acceptance criteria are met, the app goes live, with domain and hosting.
Monitoring, daily backups, a reply within three hours. Changes of up to one hour of work are included in maintenance.
08 / Questions
09 / More
The intro call costs nothing, and neither does the cost estimate after it. If what you need can be bought off the shelf, we tell you its name and send no invoice.
Start a projectWe usually reply the same business day