CRUD—Create, Read, Update, Delete—represents the four fundamental operations that form the backbone of virtually every business application you’ll ever work on.

The principle that guides the Mastering Backend community is simple: You can only ever really make progress by building real-world applications which help to solve real-world problems. If you’re looking to build an impressive portfolio, it is crucial that you do not underestimate any APIs that are well-built.

Picture this: you're building a smart building management system for a high-rise office complex. Temperature sensors, smoke detectors, and CO2 monitors are scattered throughout every floor, constantly feeding data to your central Rust application. 

Welcome to the age of AI-assisted development, where the question isn't whether machines can write code (they can), but whether they can write code that won't bite you later. Spoiler alert: in Rust, even mediocre AI-generated code tends to be remarkably robust.

If you've been wrestling with Rust's ownership system and wondering why sometimes you can't just point things at each other, you're in the right place.

In this article, we will go over the mostly used once and basic knowledge on their usage. You would learn the basics of collections. 

In this article, we’ll explore the differences, why Rust does it the way it does, and the correct way to get a true modulo in Rust while preserving signs.

Security is one of the most important parts of any web application. Whether you are building a small blog or a large e-commerce platform, you need to make sure that only authorized people can access the system. In this article, we will learn the basics of Spring Security in simple words.

Writing SQL queries can sometimes feel tricky, especially for people who are not very familiar with databases. This article will address exactly that.

Building secure APIs is essential. Whether you're protecting user data, securing business logic, or managing access to premium features. In this guide, we’ll walk through three core ways to authenticate users.

Java 8 was one of the most important releases in the history of Java. It introduced a lot of new features that completely changed the way we write code. The main aim of Java 8 is?

Spring Boot is a popular Java framework that makes it easy to build and run applications quickly. It provides ready-to-use features so you can focus on writing code instead of setting up everything from scratch. With Spring Boot, you can create web apps, APIs, and services in less time.

You don’t get hired for your LinkedIn; you get hired through it. For backend developers, LinkedIn is both an SEO surface and a trust ledger. This guide gives you an end-to-end system to turn your profile, activity, and outreach into a predictable interview engine.

Hiring backend developers in 2025 is a big deal for any business wanting to build or improve its apps, websites, or tech systems. This guide breaks down everything you need to know about hiring backend developers in 2025.

What is a slice? Let’s delve deeper into what a slice type is according to the official Rust documentation and cookbook.

In this guide, we will learn how to return a response in JSON format from a Spring Boot REST API. By default, Spring Boot returns responses in JSON, making it the standard format for most RESTful services.

As a developer you kind of feel-in-the-dark in a situation where you’re forced to deal with a codebase that is the product of bad error handling practices. To avoid that frustration, you need a solid approach to managing errors in your Node applications.

The right framework depends on several factors: job opportunities, ease of learning, community support, and long-term career growth. Laravel is one of the best frameworks for beginners in 2025 because it excels in all these areas.

If you're coming from a language like Python or JavaScript, you're used to not worrying about memory. When you're done with a value, the garbage collector quietly comes in and frees that memory for you. It’s automatic, and most of the time, it just works.

Java multithreading becomes more powerful and efficient when you start using thread pools, Callable, Future, and built-in concurrency utilities. These features help manage multiple threads better, especially in large applications.

In part one, we explored the basics of Java multithreading, including threads, processes, and how to create threads using Thread and Runnable. In this second part, we’ll go deeper and cover essential concepts like thread control methods, synchronization, inter-thread communication, daemon threads, and Java concurrency utilities.