Spring AI: The Senior Dev's Honest Take on Java's AI Moment
TL;DR Spring AI is an official Spring project that integrates AI models into Java using familiar patterns: auto-configuration, dependency injection, a…
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Stop Fixing Broken Architecture: Auto-Enforce Package Boundaries with Cursor Composer and ArchUnit
Stop Fixing Broken Architecture: Auto-Enforce Package Boundaries with Cursor Composer and ArchUnit In 2026, we aren't writing boilerplate anymore; we …
Building Resilient Multi-Agent Systems
Introduction AI agent systems are evolving rapidly. Today, we already see multi-agent architectures capable of solving complex problems by breaking th…
Securing Financial APIs in 2026: Implementing Global Request Interceptors and Automated Audit Trails in Spring Boot
With the recent surge in security vulnerabilities across the Spring ecosystem in the first half of 2026, relying on scattered security validation insi…
OAuth2 Login with JWT and Refresh Tokens in Spring Boot — The Setup You'll Rebuild Every Time
Most Spring Boot applications eventually need authentication. And many teams rebuild the same foundation every time. Add a login endpoint. Generate a …
System Prompt Leakage vs Prompt Injection in Spring Boot AI
System Prompt Leakage vs Prompt Injection Spring Boot AI You've wired up a Spring Boot service to an LLM, added a SystemMessage with confidential busi…
How I built a search engine
Hello all, I built a search engine from scratch in Java. In a previous course we were given it as a group project, but since I worked on just the docu…
Streaming 25 Million Excel Cells Through 7 MB of Memory
Streaming 25 Million Excel Cells Through 7 MB of Memory TL;DR: I built an export pipeline that streams 15M+ records as formatted Excel files inside ZI…
Low-Level System Design (LLD) in Java: A Beginner's Guide
Introduction When preparing for software engineering interviews, many developers focus heavily on Data Structures and Algorithms. However, as you move…
Securing Your Spring Boot Architecture: A Pragmatic Approach with Clprolf
Introduction Spring Boot is an incredible framework. It gives developers immense freedom to build and scale applications quickly. However, in large te…
Stop Hiding SQL Behind Your ORM: jOOQ, JPA, and JDBC Under Production Load
Most persistence debates in Java are framed incorrectly. The question is not: Should we use JPA, jOOQ, or JDBC? The real question is: Is this part of …
I built a Spring Boot + Angular + JWT Full Stack Starter Kit — here's what I learned
Why I built this Every time I started a new Java full stack project I was spending 2-3 days just on setup — JWT configuration, Spring Security, CORS, …
Deploying Spring Boot to AWS EC2 with Docker and GitHub Actions — The Repeatable Way
Deploying a Spring Boot application to AWS EC2 is straightforward once you've done it. Getting there the first time — and repeating the setup on your …
What is the Purpose of the @Autowired Annotation in Spring Boot?
Learn what the @Autowired annotation in Spring Boot is, how dependency injection works, practical examples, best practices, and common mistakes to avo…
OpenAPI, ORM, SVG and Lottie
This is the third follow-up to Friday's release post . Saturday's was about how you iterate; yesterday's was about new platform APIs in the core; toda…
Stop Stuffing Context Windows: Dynamic Tool Pruning with Spring AI Vector Routing
Stop Stuffing Context Windows: Dynamic Tool Pruning with Spring AI Vector Routing In 2026, building enterprise-grade Java agents means managing thousa…
Google Authenticator integration with Spring Boot
Google Authenticator Integration with Spring Boot Passwords alone just don't cut it anymore. We've all seen the headlines — data breaches, credential …
Building an ML-Powered Notification Routing Engine on AWS
Most applications send notifications using static schedules. The problem is that users have different engagement patterns. A notification sent at the …
From Monolith to Microservices: Why I Redesigned Finovara's Architecture - Finovara
At some point, a monolith starts working against you. In my case, Finovara was a single Spring Boot application handling everything (authentication, t…
From Monolith to Microservices: Why I Redesigned Finovara's Architecture - Finovara
At some point, a monolith starts working against you. In my case, Finovara was a single Spring Boot application handling everything (authentication, t…
Java for Beginners: Why Learn Java Instead of C, C++, C#, Python, or JavaScript?
Hey Folks! 👋 Good Day... I started learning Java one week ago. Every day I hear the word Java . If somebody asks me, "What are you studying in your cr…
How I Learned Unit Testing in Spring Boot by Building One Simple Project
When I first started learning Spring Boot, I constantly heard senior developers talking about unit testing, JUnit, Mockito, and Test-Driven Developmen…
Почему я перестал передавать Spring Pageable в контракты слоя приложения
Контракт use case должен описывать потребность приложения, а не API выбранного persistence фреймворка. Spring Data пагинация хорошо работает в CRUD пр…
Beyond Inheritance in Java: A Practical Guide to Composition
Introduction In Java, inheritance is commonly used to reuse code using the extends keyword. However, inheritance is not always the best solution. In m…
What Really Happens When You Create an Object in Java? Understanding Constructors and Packages
1.Introduction Have you ever created an object in Java and wondered what happens behind the scenes the moment that object comes to life? When you writ…
AI Gateway для микросервисов: гайд по интеграции LLM в 2026
В микросервисной архитектуре LLM быстро превращаются из удобного инструмента в отдельный источник рисков: растут счета за ток…
Java on Raspberry Pi: Rediscovering Java Beyond the Enterprise
When most people think about Java, they immediately picture enterprise applications, banking systems, massive backend services, or decades-old corpora…
«Весомый» рефакторинг, или как мы перестали беспокоиться и полюбили работу с весами
Представьте, что вы работаете над кодом магазина, который живёт уже много лет. Бизнес доволен, продажи растут, но есть одна проблема — модуль обращени…
Introducing the ArchUnit Checker for the Clprolf Framework
One of the most interesting aspects of architectural frameworks is not the rules themselves, but the ability to verify that those rules are actually b…
Understanding Jenkins CI/CD Using a Tiny Java Project (A Beginner-Friendly Walkthrough)
Understanding Jenkins CI/CD Using a Tiny Java Project Most Jenkins tutorials immediately jump into Docker, Kubernetes, Maven, cloud deployments, and e…