Milan Jovanović (@mjovanovictech) / X

Milan Jovanović

18.4K posts

Milan Jovanović

@mjovanovictech

I make .NET content

Joined June 2022

Pinned
Milan Jovanović
@mjovanovictech
17h
I just launched Katabench, a practice platform for .NET developers. Most coding practice stops when the output is correct. Katabench grades the engineering qualities a green checkmark misses.
Milan Jovanović
@mjovanovictech
Jun 18, 2024
𝗦𝗵𝗼𝘂𝗹𝗱 𝘆𝗼𝘂 𝘀𝘁𝗼𝗽 𝘂𝘀𝗶𝗻𝗴 𝗨𝗨𝗜𝗗𝘀? UUIDs (Guid in C#) are widely used as unique identifiers in databases. UUIDs are random, which makes them popular in distributed systems. However, UUIDs have some drawbacks: 1. UUIDs slow down database inserts. Each
Milan Jovanović
@mjovanovictech
Aug 27, 2023
Do you want to learn Clean Architecture and DDD? I prepared 45 lessons for you 🔥 𝗖𝗹𝗲𝗮𝗻 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗙𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀 - Project setup - youtu.be/tLk4pZZtiDY - Minimal APIs - youtu.be/GCuVC_qDOV4 - Dependency injection - youtu.be/tKEF6xaeoig -
Milan Jovanović
@mjovanovictech
Jun 24, 2024
I've been using Clean Architecture for 5+ years. Here's why I think it's amazing. 👇 The biggest pain point with enterprise applications is a lack of structure. Every project uses a different approach, making it difficult to transfer technical knowledge from one system to
Milan Jovanović
@mjovanovictech
Feb 19, 2023
I worked on a system that has 10 API instances running in parallel and handles millions of requests per day. And I wondered for the longest time what makes an API horizontally scalable. I want to share my thoughts on this since I had a chance to work on a system like that.
Milan Jovanović
@mjovanovictech
Nov 9, 2023
Do you want to learn Clean Architecture and DDD? I have prepared 45 lessons for you 🔥 𝗖𝗹𝗲𝗮𝗻 𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗲 𝗙𝘂𝗻𝗱𝗮𝗺𝗲𝗻𝘁𝗮𝗹𝘀 - Project setup - youtu.be/tLk4pZZtiDY - Minimal APIs - youtu.be/GCuVC_qDOV4 - Dependency injection -
Milan Jovanović
@mjovanovictech
Jul 11, 2023
Here are 12 excellent libraries I use in my projects: 1. MediatR 2. FluentValidation 3. Serilog 4. Refit 5. Polly 6. Entity Framework Core 7. MassTransit 8. Quartz 9. SignalR 10. YARP 11. xUnit 12. FluentAssertions What would you add to the list?
Milan Jovanović
@mjovanovictech
Jun 3, 2025
Scripting in C# is here and it's awesome
Milan Jovanović
@mjovanovictech
Sep 25, 2023
𝗧𝗵𝗲 𝗗𝗼𝗺𝗮𝗶𝗻 𝗹𝗮𝘆𝗲𝗿 𝗳𝗼𝗹𝗱𝗲𝗿 𝘀𝘁𝗿𝘂𝗰𝘁𝘂𝗿𝗲 𝘀𝗵𝗼𝘂𝗹𝗱 𝗲𝘅𝗽𝗿𝗲𝘀𝘀 𝗶𝗻𝘁𝗲𝗻𝘁. I didn't understand this a few years ago. The Domain sits at the core of Clean Architecture. It's where you define your entities and the most important business logic. So,
Milan Jovanović
@mjovanovictech
Oct 20, 2023
CQRS = Separate read/write databases? Not so fast! This isn't really what CQRS is about. First, there was the CQS - Command-Query Separation principle. Here's what CQS is: - Commands change state, don't return data - Queries don't change state, return data - Queries should
Milan Jovanović
@mjovanovictech
Sep 16, 2025
Why should you use Clean Architecture? Here's why I use it - and you can decide if that makes sense for you. It follows three simple ideas: - The direction of dependencies is toward the center - The core contains the domain entities and business rules - The core should be
Milan Jovanović
@mjovanovictech
Jun 17, 2024
𝗦𝗰𝗮𝗹𝗶𝗻𝗴 𝗪𝗲𝗯 𝗮𝗽𝗽𝘀 𝘁𝗼 𝟭,𝟬𝟬𝟬,𝟬𝟬𝟬 𝘂𝘀𝗲𝗿𝘀 I worked on a large system that had more than a million users. This is how we scaled the system to handle that amount of traffic. The application started as a humble monolith: one application server and one
Milan Jovanović
@mjovanovictech
Sep 26, 2025
How do you draw architectural diagrams? One of the most popular approaches is using UML diagrams. However, there's also the C4 model. C4 stands for: - (System) Context Diagram - Container Diagram - Component Diagram - Code Diagram It's a lightweight model to describe your
Milan Jovanović
@mjovanovictech
Sep 11, 2024
My second year Microsoft MVP disc finally arrived. 🔥