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Mert Özen — articles and videos on backend, software architecture, and developer productivity

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What Is Angular and Why Does It Exist? The Reason Behind the Framework
Frontend

What Is Angular and Why Does It Exist? The Reason Behind the Framework

What exactly is Angular, why does it exist, and what problem does it solve? We explain the framework vs library distinction, the TypeScript requirement, and when Angular is the right choice from scratch.

Read more → Aug 23, 2026 · 9 min
Introduction to Web APIs with .NET 9: REST principles and why .NET?
Backend

Introduction to Web APIs with .NET 9: REST principles and why .NET?

The first article of the .NET 9 Web API series. We cover REST principles, resource-oriented thinking, HTTP methods, and why we chose .NET 9, in a plain, example-driven style.

Read more → Jul 5, 2026 · 9 min
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Introduction to Web APIs with .NET 9: REST principles and why .NET?
Backend PART 01

Introduction to Web APIs with .NET 9: REST principles and why .NET?

The first article of the .NET 9 Web API series. We cover REST principles, resource-oriented thinking, HTTP methods, and why we chose .NET 9, in a plain, example-driven style.

5 Jul 2026 9 min 204
Setting up the initial project: project structure, Program.cs, and a minimal hosting model.
Backend PART 02

Setting up the initial project: project structure, Program.cs, and a minimal hosting model.

We set up our first .NET 9 Web API project. We break down Program.cs line by line, and understand the minimal hosting model, the builder-versus-app split, and why middleware order matters.

5 Jul 2026 11 min 148
Controllers or Minimal APIs? When to Choose Which
Backend PART 03

Controllers or Minimal APIs? When to Choose Which

We compare two ways of writing endpoints in .NET 9: controller-based structure and Minimal APIs. When each makes sense and what the real difference is, made clear with examples.

25 Jul 2026 10 min 129
API Versioning: Evolving Your API Without Breaking Old Clients
Backend PART 18

API Versioning: Evolving Your API Without Breaking Old Clients

We cover how not to break old clients while evolving the API over time: what a breaking change is, why versioning is needed, the URL/header/query methods, and setting up versioning in .NET.

15 Aug 2026 12 min 119
Introduction to Entity Framework Core: DbContext and Your First Migration
Backend PART 09

Introduction to Entity Framework Core: DbContext and Your First Migration

We start storing our data in a real database. What EF Core is, what DbContext represents, how tables are defined with DbSet, and how the database is created with the first migration, step by step.

2 Aug 2026 13 min 112
Dependency Injection in Depth: Singleton, Scoped and Transient Lifetimes
Backend PART 12

Dependency Injection in Depth: Singleton, Scoped and Transient Lifetimes

We cover the lifetime concept at the heart of dependency injection. The difference between singleton, scoped and transient, when to use each, and the subtle bugs a wrong choice causes.

8 Aug 2026 13 min 107
Logging: ILogger, Serilog and Structured Logging
Backend PART 14

Logging: ILogger, Serilog and Structured Logging

We cover logging: the basics of ILogger, log levels, the difference between plain-text and structured logging, and why Serilog makes this job much more powerful in serious projects.

8 Aug 2026 12 min 100
What Is a DTO and Why Shouldn't We Return the Entity Directly?
Backend PART 07

What Is a DTO and Why Shouldn't We Return the Entity Directly?

We cover what DTOs are and why you shouldn't return database objects directly: the concrete benefits of using DTOs for security, privacy, flexibility, and contract stability.

2 Aug 2026 11 min 100
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Angular Setup and Your First Project: Preparing the Environment from Scratch
Frontend PART 02

Angular Setup and Your First Project: Preparing the Environment from Scratch

We install Node.js and the Angular CLI step by step, create our first project, then walk through the folder structure to learn what every file does before writing a single line of app code.

23 Aug 2026 10 min 21
What Is Angular and Why Does It Exist? The Reason Behind the Framework
Frontend PART 01

What Is Angular and Why Does It Exist? The Reason Behind the Framework

What exactly is Angular, why does it exist, and what problem does it solve? We explain the framework vs library distinction, the TypeScript requirement, and when Angular is the right choice from scratch.

23 Aug 2026 9 min 24
Performance, Optimization and Closing the Series: Where to Go From Here?
Backend PART 30

Performance, Optimization and Closing the Series: Where to Go From Here?

We close the series: the basic principles of performance, the most common bottlenecks (like the N+1 query), not optimizing without measuring, a recap of what we learned, and where to go next.

23 Aug 2026 13 min 24
Deploying with CI/CD: Automating Test, Build and Deployment with GitHub Actions
Backend PART 29

Deploying with CI/CD: Automating Test, Build and Deployment with GitHub Actions

We cover CI/CD: what continuous integration and continuous deployment mean, why an automated pipeline is needed, setting up a workflow with GitHub Actions, and automating test-build-deploy on every change.

23 Aug 2026 13 min 23
Containerizing with Docker: Putting the Application into a Package That Runs the Same Everywhere
Backend PART 28

Containerizing with Docker: Putting the Application into a Package That Runs the Same Everywhere

We cover containerizing the application with Docker: what a container is, how it solves the "it worked on my machine" problem, packaging a .NET app with a Dockerfile and multi-stage build.

23 Aug 2026 13 min 20
Health Checks and Monitoring: Observing That the API Is Up and Healthy
Backend PART 27

Health Checks and Monitoring: Observing That the API Is Up and Healthy

We cover health checks and monitoring: automatically checking whether the application is healthy in production, observing dependencies like the database, the liveness/readiness distinction, and the basics of monitoring.

23 Aug 2026 12 min 25
Caching: In-Memory and Distributed Cache with Redis
Backend PART 26

Caching: In-Memory and Distributed Cache with Redis

We cover caching: improving performance by temporarily storing frequently requested but rarely changing data, the difference between in-memory and Redis-based distributed cache, and cache consistency.

23 Aug 2026 13 min 26
Integration Testing: Testing the API End to End with WebApplicationFactory
Backend PART 25

Integration Testing: Testing the API End to End with WebApplicationFactory

We cover integration testing: its difference from unit testing, what testing pieces together means, flowing a real request end to end with WebApplicationFactory, and using a separate test database.

21 Aug 2026 13 min 31
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