Spring Boot made simple 🍃
When you’re working with AWS as a backend engineer — especially with Java and Spring Boot stacks — there will inevitably come a moment when you need to run commands against your AWS resources using the AWS Command Line Interface (CLI) or AWS SDKs.
And that moment comes with a crucial question: “How do I locally authenticate securely?”
Continue reading “AWS Local Authentication: Understanding Your Options and Using IAM User Long-Term Credentials Responsibly”Hardcoding database credentials is a practice we all want to avoid — yet it still happens.
With Spring Boot and AWS Secrets Manager, you can eliminate plain-text secrets in your application.properties while keeping your configuration simple and flexible.
PostgreSQL is a production-grade relational database system widely used across modern enterprise and microservice architectures. If you’re building a Spring Boot application, connecting it to PostgreSQL isn’t just a matter of adding a dependency—it’s about configuring it the right way from day one.
This guide walks you through how to connect a Spring Boot application to PostgreSQL using Spring Data JPA, initialize the schema reliably and understand the pros and cons of using ddl-auto.
In a perfect world, your REST API always works flawlessly. But in the real world? Things break.
How your application handles those failures can define the difference between a developer’s dream and a support team’s nightmare.
In this post, you’ll learn how to implement robust, consistent, and professional-grade exception handling in Spring Boot. We’ll go beyond catching errors—we’ll turn exceptions into structured, debuggable, and meaningful responses.
Continue reading “Exception Handling Like a Pro in Spring Boot REST APIs”When building APIs, the hardest bugs often come from the easiest oversight: trusting user input. If your controller accepts data as-is and only relies on business logic to catch errors, you’re putting too much responsibility on the wrong layer.
Validation isn’t a nice-to-have. It’s a contract.
Continue reading “Building Robust APIs with Spring Boot and Validation Annotations”Dependency Injection (DI) is at the heart of the Spring Framework. It promotes loose coupling and easier unit testing by decoupling object creation from object usage. In Spring, there are three main ways to inject dependencies into a class: field injection, setter injection, and constructor injection. While all three are supported, each has its own implications for code readability, testability, and maintainability.
Continue reading “Understanding Dependency Injection in Spring: Field vs Constructor vs Setter”When building REST APIs with Spring Boot, it’s common to see beginners return entities directly from their controllers. At first glance, this seems fine—the data flows, the response looks right, and everything “just works.”
But what happens when your entity evolves? When sensitive fields accidentally get exposed? Or when lazy-loaded relationships break your JSON?
Continue reading “What Is a DTO? (And Why You Shouldn’t Return Your Entities in Spring Boot)”Spring Boot is the industry-standard framework for building modern Java applications. It dramatically reduces boilerplate code, accelerates development, and is battle-tested for microservices and monoliths alike. If you’re new to the Spring ecosystem, this post will walk you through everything you need to start building.
Continue reading “Getting Started with Spring Boot: Build a Task Manager App from Scratch”Learn how to manage multiple environments in Spring Boot using profiles, properties, and YAML configurations
When developing enterprise applications with Spring Boot, managing multiple environments is a necessity. You need different configurations for development, testing, staging, and production, but hardcoding settings or maintaining separate codebases is a disaster waiting to happen.
Continue reading “Spring Boot Profiles: Managing Multiple Environments Like a Pro”Secure your Spring Boot API with OAuth2 Resource Server and Auth0, using JWT authentication for protection
Security is non-negotiable in modern application development. As APIs become the backbone of digital services, protecting them with robust authentication and authorization mechanisms is critical. OAuth2 has become the de facto standard for securing APIs, and when combined with an identity provider like Auth0, it provides a scalable and secure solution for managing access.
Continue reading “Protecting Your Spring Boot Application with OAuth2 Resource Server and Auth0”
