#nestjs Development Tutorials & Tips | Roast Dev

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How to test NestJS Guards

There are plenty of articles out there discussing different testing strategies for NestJS, and even the official documentation has a section dedicated to it, so why should you care about yet another o...

23.04.2025 0 Read More

Null Object Design Pattern

📖 What is the Null Object Pattern? The Null Object Pattern is a behavioral design pattern where: Instead of returning null (which can cause errors if used without checking), You return a s...

04.05.2025 0 Read More

Blocking vs Non-Blocking I/O in Microservices with NestJS

When developing microservices with NestJS, one of the most important concepts to master is the input/output (I/O) model, especially how to handle blocking and non-blocking operations. This decision di...

23.04.2025 0 Read More

Event-Driven Architecture in NestJS

Event-Driven Architecture (EDA) is an increasingly popular approach in modern systems that require high scalability, low coupling, and asynchronous processing. We'll explore how to implement this arch...

23.04.2025 0 Read More

Comparação prática entre NestJS e Express: Quando usar cada um?

Introdução Como desenvolvedor fullstack TypeScript, uma das decisões mais importantes que enfrentamos ao iniciar um novo projeto backend é: qual framework escolher? No universo Node.js, E...

24.04.2025 0 Read More

Error Handling in NestJS: Best Practices and Examples

In any real-world backend application, proper error handling is essential. It ensures that your system doesn't crash unexpectedly, responds clearly to clients, and makes debugging easier for developer...

26.04.2025 0 Read More

Input Data Validation in NestJS

When building an API, one of the first lines of defense you must establish is strong input validation. This not only improves the user experience by providing clear error messages, but also protects y...

26.04.2025 0 Read More

Evitando Erros de Índice Único (E11000) ao Usar findOneAndUpdate com upsert no Mongoose

Como garantir unicidade de remessas em sistemas multi-tenant no MongoDB? Entenda por que erros E11000 acontecem, como alinhar filtros de upsert com índices únicos e evite armadilhas clássicas em mo...

26.04.2025 0 Read More

How to Profile a NestJS Application

When building a NestJS application, it’s not enough for it to just work, it needs to be fast, efficient, and stable. To achieve that, we must go through profiling, the process of understanding how o...

26.04.2025 0 Read More

Integrating KC Authorization Services into NestJS API

In this article, we are going to connect between Keycloak Authorization Services and a real NestJS API. After setting up all the resources, scopes, policies, and permissions in Keycloak, it's time to ...

30.04.2025 0 Read More

How to test NestJS Guards

Null Object Design Pattern

Blocking vs Non-Blocking I/O in Microservices with NestJS

Event-Driven Architecture in NestJS

Comparação prática entre NestJS e Express: Quando usar cada um?

Error Handling in NestJS: Best Practices and Examples

Input Data Validation in NestJS

Evitando Erros de Índice Único (E11000) ao Usar findOneAndUpdate com upsert no Mongoose

How to Profile a NestJS Application

Integrating KC Authorization Services into NestJS API

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