Custom applications
Desktop applications for Windows and Linux, of essentially any kind and scope. From a single-purpose tool to a system that operations rely on.
- WPF and .NET desktop
- Deployment and maintenance
- Migration from older technologies
Freelance full-stack .NET developer
I write custom software. From desktop to web to ERP.
I’ve been building custom applications for over twenty years — desktop, web, and mobile. Preferably in .NET, most often where systems that originally couldn’t talk to each other need connecting.
20+
years freelancing
3
long-term partners
.NET
home turf since 2004
What I can do for you
Web and intranet
Intranet and public-facing applications in ASP.NET Core, Blazor, or MVC. Including Web APIs and connections to anything you already have.
- Blazor (server and WebAssembly)
- REST APIs and integrations
- Running in Docker
ABRA ERP
Custom modifications, add-ons, and integrations for ABRA, a Czech ERP system. For five years I did it from the inside; now I do it for you.
- Modifications and extensions
- Connections to surrounding systems
- Reports and automation
Mobile and the rest
Mobile apps, mostly for Android. And when there’s time to spare, something in Unity too — because programming should be fun as well.
- Android apps
- .NET MAUI
- Unity 2D for the fun of it
Selected projects
Migrating an operations application to .NET 10
Moving an operations application on top of an ERP from .NET Framework 4.8 to .NET 10 with golden-master tests — the new version is checked against the recorded behavior of the old one. Writing data is hybrid: ERP entities go through its API, the application’s own data straight into the database.
- .NET 10
- .NET Framework 4.8
- Dapper
- MS SQL
- xUnit
Parametric price quotes
An application for a manufacturer’s parametric price quotes, in service from 2019 to this day — in that time it has been through three generations of .NET. It has its own evaluator for mathematical formulas, because parametric calculations follow what the salesperson enters, not the programmer.
- .NET 10
- Blazor Server
- MongoDB
- EF Core
- EPPlus
Fotbalkan
A personal project in .NET 10 and Blazor for organizing amateur soccer matches, with a schedule that took players’ time zones into account and push notifications that needed no account with a third-party service. It no longer runs, because the soccer group it was made for has ended.
- .NET 10
- Blazor
- .NET Aspire
- PostgreSQL
- EF Core
radekmazar.eu
This site. A personal website in .NET 10 with its content in Markdown, maintained by agents and deployed with a single push.
- .NET 10
- Blazor SSR
- Markdig
- Docker
- nginx
From the blog
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Software doesn’t age by being used
Running a program doesn’t wear it out. It ages by being left alone — and whoever lets that go far enough ends up buying not maintenance, but the application all over again.
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A machine will read the invoice. Telling who it’s from is harder.
A document can be read entirely correctly and still nobody can tell who it belongs to. That’s where the expensive part begins — and you can tell a good system by what it does when it isn’t sure.
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When a machine retypes the invoices
With incoming invoices, the easy part is reading them, not deciding what can be trusted. So when the owner asks why artificial intelligence isn’t retyping them from PDFs instead of the bookkeeper, the short answer is that it can.