About Me
I develop custom apps and software solutions – with particular attention to security and privacy. Instead of off-the-shelf software, every solution is built to fit the specific requirements.
Custom App Development
I build native apps for iOS and Android – from the initial idea through concept to release on the App Store or Play Store. Instead of ready-made building blocks, every app is developed specifically for its use case: whether that's a small everyday app for personal use or a solution for teams and companies, such as the time tracking app with mileage log, multi-tenant separation and a live overview.
Focus on Security
For me, security is part of the concept from the very beginning, not a feature bolted on afterwards. That includes well thought-out permission and role concepts, clean tenant separation in multi-tenant solutions, protected logins, and a deliberate, minimal approach to personal data.
Self-Hosted Instead of Cloud Lock-In
Not every solution needs to run in someone else's cloud. For businesses and individuals who want to keep their data in their own hands, I also develop and maintain self-hosted solutions, where the backend and data live on your own or a chosen infrastructure – without depending on a large cloud provider.
No Tracking, No Advertising
My own apps deliberately do without tracking, analytics tools and advertising – data stays, wherever possible, exclusively on the device or on infrastructure controlled by the client. I bring this same principle into client projects: as much data minimization as possible, as much cloud as necessary.
Tailored Customization
Whether it's extending an existing app, connecting to existing systems, or building entirely new software: I develop client-specific solutions precisely tailored to the requirements at hand – including individual adjustments during ongoing operation as requirements change.
Services at a Glance
- Concept & consulting for custom app and software projects
- Native app development for iOS (Swift / SwiftUI) and Android (Kotlin)
- Backend development for app-specific or self-hosted solutions
- Self-hosted operation instead of dependence on third-party clouds
- Privacy and security concepts, GDPR-compliant implementation
- Client-specific customizations, extensions and ongoing support
Contact
Interested in a custom app or solution? Just write to me at christoph@kainzner.net. Legal information can be found in the Imprint.