Mobile applications for small and medium-sized companies. Development for iOS and Android from a shared codebase, plus backend, system integration and operation from a single source.
Write to me and tell me what it is about. You will have a reply within one working day.
In many companies the commercially relevant data is created outside the office: during installation, on the road, at the customer's site. It is recorded there on forms or photos, and someone else transfers it hours later.
This break in the chain costs twice over. Once in working time for re-entering the data, once in currency: scheduling, invoicing and analysis all work with yesterday's figures.
A mobile application closes the gap where it appears. Not as a new overall system, but as an addition to what is already in use.
Development from a shared codebase, from an internal tool to an application for end customers. Where the use case demands it, also under difficult conditions: operation without a mobile connection, deferred synchronisation, barcode and QR capture, usable while wearing work gloves.
The application is one half, where the data ends up is the other. I develop the backend, set up the interfaces to existing systems and take over operation on request. One contact for app, backend and infrastructure.
When a project has stalled, the original developer is no longer available or store compliance is running out: I take over existing Flutter applications, bring them up to date and continue to develop them.
I also take over existing native projects: Java for Android, Swift and SwiftUI for iOS. New applications are built with Flutter.
Pick a technology to see what it is used for in your projects.
As soon as personal data is processed, and that is regularly the case with employee, customer or health data, the question of where it is stored comes before the first line of code.
I clarify the requirements in advance and choose the infrastructure accordingly. Operation exclusively in European data centres is possible, and where needed also on dedicated infrastructure without any of the large cloud providers.
You will know before the project starts which services are used and where they are operated. This rules out unpleasant surprises during a data protection review.
I develop software, meaning mobile applications and the systems behind them. This does not include hardware, embedded systems or system administration, nor pure design work or websites.
If an enquiry does not fit this profile, I say so in the first conversation and recommend someone more suitable where I can.
A non-profit organisation in the USA supplies food to people in need. Distribution was documented manually, which made neither reliable traceability nor effective misuse control possible. The administrative effort tied up staff who were missing from distribution.
The result is an application suite of three components: an app for the staff at the distribution points, one for the recipients, and a tool for generating the registration codes. In productive use for 18 months.
The organisation has not yet approved being named.
Recording the workflow as it stands today. The result is a decision on which functions the application covers and which it deliberately does not.
Development in short intervals with working intermediate versions. You receive a first version to test after two weeks, not only at the end of the project.
Publication on the App Store and Google Play, setup of the backend, handover of the documentation. Store accounts and credentials stay with the client.
Operating systems and store policies change continuously. I remain available for maintenance and further development, without any obligation on your side.
I am a freelance software developer in Herne, Germany. What keeps me in this work are systems that are actually used in daily operations and change something there. Since 2022 I have been building mobile applications with Flutter, along with the backends and the operation behind them.
My projects usually have an operational core. The largest of them has been running for three years at a relief organisation in the USA and is used daily by their staff.
Clients work with me directly. Concept, development, delivery and operation are in one pair of hands, with no project layer in between.
That depends on the scope. An application for one clearly defined workflow starts in the low five figures, systems made up of several applications go beyond that. More reliable than any estimate over the phone is going through the workflow together. On that basis you receive a binding fixed-price offer.
For a clearly defined workflow, four to twelve weeks is usual. You receive a first working version to test after about two weeks, not only at the end. Publication in the stores then takes a few days.
No. You do not need someone who understands software, you need someone who knows the workflow the app is meant to represent. I take care of the technology, the stores, the backend and the operation.
Operating systems and store policies change continuously. An app that nobody maintains for two years will eventually be removed from the store. On request I take over maintenance and further development under a monthly agreement. It is not obligatory.
A fair question with a sole trader, which is why my approach is built around it. Store accounts, credentials and source code belong to you and live in your repository. I work with Flutter, a widely used standard, and document in a way that lets another developer take over.
30 to 60 minutes, without obligation and free of charge. We look at the workflow you want to digitise, clarify the possible scope and what a realistic timeframe would be. Any commission comes afterwards.
Write me a short note about the workflow in question. A time can then be found in one or two messages.