Personal notes on software
Hi, I’m Grzegorz.
Learning as I go.
I build software and write about what I learn along the way. Mostly C# / .NET, distributed systems, testing, and the occasional rabbit hole.
Giving AI the night shift
A .NET repair harness for a blocked Kafka consumer
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Cache readiness and rehydration models
Compare Kafka replay and database snapshot recovery for rebuilding service cache without missing concurrent events.
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Complete Guide to Functional Tests
Why functional tests are the most durable investment you can make — from AI-proof guardrails and living documentation to debugging superpowers and QA collaboration.
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The Infrastructure Configuration Nightmare: When Separation Creates Slowdown
Explore how centralized infrastructure repositories create bottlenecks in large organizations and discover a better approach using in-codebase manifests that maintains security while dramatically improving deployment speed.
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From Chaos to Control: Relationship-Based Access Control (ReBAC) with OpenFG
Dive into into the world of Relationship-Based Access Control (ReBAC) and how to implement and maintain authorization system using OpenFGA.
Read articleSnapshot Testing with C# and WireMock:
Learn how to simplify API testing in C# using snapshot recording and WireMock. No more manual mocks – just magic!
Read articleWhat did I learn during 2024 advent of code
Way to deliver message to each replica of deployment on the example of cache invalidation
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Broadcast request across replicas in k8s
Way to deliver message to each replica of deployment on the example of cache invalidation
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Few stories about breaking changes
Examples of changes that are not obvious breaking changes in libraries code
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Context propagation in distributed systems and cooperation with OpenTelemetry
How to propagate context between distributed systems and take advantage of it using OpenTelemetry
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HttpContext BodyReader and incremental json parser
Other light way to read http request body using PipeReader and use it to incremental parse json content
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