Raf
Bielec
// Senior Software Engineer
20+ years in .NET — from .NET Framework 1.1 to whatever comes next. Senior engineer, occasional team lead or IT manager. These days the interesting question is figuring out where AI actually belongs in real software development teams and businesses. Polish by origin, British by choice.
// xenium_2025
At Xenium 2025 in Łódź — a demoscene demoparty where coders compete in real-time demos, graphics, and music.
Some things still run on the Amiga.
20+
years in .NET
C# 14
.NET 10 LTS
BPMN
business process modelling
AI
assisted workflows
// areas of focus
20+ yrs .NET
C#, ASP.NET, Azure, MS SQL. Started with .NET Framework 1.1 and followed the platform as it became genuinely cross-platform and excellent.
BPMN & Processes
Business process modelling. Translating how organisations work into clear, structured models that can actually be improved.
AI-Assisted Dev
LLMs, Claude, Grok, AI-driven workflows. Finding where AI genuinely accelerates engineering and where it doesn't.
Game Dev
Grew up on Quake and Duke Nukem 3D. Now building instead of just playing — game loops, rendering, and performance-critical code.
// latest writing
Recent Posts
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Website v2.0 — a dark redesign with Tailwind 4
04/04/2025#website#astro#frontend#tailwind#projectI redesigned my personal site from scratch with a dark terminal aesthetic, Tailwind CSS v4, and self-hosted fonts — then kept improving it.
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One Microsoft Way
02/02/2025#dotnet#nostalgia#microsoftThere used to be one Microsoft way of doing things. We were isolated and Microsoft led the way. Nothing else mattered and we lived in a cosy bubble. Everything has changed now and .NET developers face new challenges in a world which seems foreign and unnecessary.
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Feature switches / feature flags in .NET
15/12/2024#dotnet#featureflags#featureswitches#openfeature#repositoryMicrosoft introduced some new functionalities to support feature switches / feature flags in .NET. I took some time to check it out and I also looked at the OpenFeature library.