Service-to-Service Communication in Microservices: What Every Developer Should Know
I still remember the first time a junior dev I was mentoring asked me, "why did the order service just... hang for 30 seconds and then crash the whole…
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Integrating Specmatic Contract Testing into Spring PetClinic REST: What a "Simple" DELETE Test Taught Me About Test Architecture
Introduction Hello, I am Kuruba Ramesh, a Full Stack Developer specialising in the MERN Stack and Java Spring Boot. As part of my ongoing work with th…
Kiponos Java SDK 5.0 What’s New — Developer Guide
Kiponos Java SDK 5.0 What’s New — Developer Guide This is the technical companion to the 5.0 milestone announcement: what changed, how modes behave, h…
NepalPay v1.2.0 — Metrics, Health Indicators, and Everything CodeRabbit Caught
My previous article ended with NepalPay being published to Maven Central. Khalti Refund API ✅ v0.5.0 Retry with Backoff ✅ v0.6.0 Maven Central ✅ v1.0.…
Building an AI Agent System with the ReACT Pattern in Java
From answering questions to solving problems — Phase 6 of the Jarvis AI Platform After Phase 5, Jarvis could hear, speak, remember conversations, retr…
Fixing “Port 8080 was already in use” in Spring Boot on Windows
If your Spring Boot application fails to restart even after stopping it in STS or your IDE, and you see this message: APPLICATION FAILED TO START Desc…
Adding Voice to a Java AI Assistant — Whisper, TTS, and the Voice Conversation Loop
How we gave Jarvis the ability to hear and speak — Phase 5 of the Jarvis AI Platform Where We Left Off After Phase 4 , Jarvis could answer questions u…
Stop Rebuilding Exception Handling in Every Spring Boot Project
After working on multiple Spring Boot projects over the years, I noticed an interesting pattern. Every application had different business requirements…
Why Java Is Still Important and Relevant in 2026
Java has been around for more than 30 years, and every few years someone asks the same question: "Is Java still relevant?" In 2026, the answer is stil…
I Built a Production-Ready Spring Boot 4.1.0 SaaS Boilerplate — Here Is What I Learned
Why I Built This Every Spring Boot project I started, I spent the first 2–3 weeks building the exact same things: JWT authentication Email verificatio…
MapStruct vs Immuto: Where the Records Gap Actually Is
A follow-up to Java Records deserve a mapper My earlier post introduced Immuto and made the general case for a mapper designed around Records from day…
Stop calling a service that's already down: circuit breakers with Resilience4j
Day 14 of building OrderHub in the open. So far we have a monolith with real persistence, validation, exception handling, OpenAPI docs, a Redis cache,…
How does Spring Boot simplify the development of Java applications?
Introduction Imagine you're assembling a new piece of furniture. One option is to buy every screw, bolt, plank, and tool separately, then spend hours …
Stop Guessing Batch Sizes: High-Performance Bulk Inserts in Spring Boot with PostgreSQL COPY
When you can't afford to guess the right batch size and don't want to pay for that lesson in production When I designed the persistence layer of a rea…
RAG with Spring Boot — Embeddings and Vector Search Step by Step (2026)
Canonical URL: Republished from munonye.com . Full code on GitHub . Learn how to build a RAG Spring Boot tutorial pipeline that answers questions from…
Deploying Spring Petclinic Microservices with Docker Compose: An End-to-End DevOps Deployment Experience
As part of my DevOps Micro Internship (DMI), I completed the deployment of the Spring Petclinic Microservices application using Docker Compose. This p…
Passwords are not necessary, a Oauth/OIDC approach
Intro It is possible to skip the burden of password management, security, encryption and password rotations. When using OAuth 2.0 with OIDC (OpenID Co…
Show Dev: Self-reinforcing K-pop data pipeline using Spring Boot and pgvector (Built on OCI Free Tier)
Hi everyone, I'm a backend developer based in Seoul. I built k-cosmos, an interactive web-based 3D music space that maps K-pop tracks based on 768-dim…
Angular CRUD Tutorial (2026 Edition) — Part 1: Setup with Spring Boot
Canonical URL: This article is republished from the original on munonye.com . Read the full six-part series and updated Angular 19 code there. Introdu…
Spring Boot 3.5 EOL Is Coming June 30: 115 Breaking Changes and Why Solon 4.0 Won't Care
The June 30 Java Wake-Up Call: What Spring Boot 3.5 EOL Means for Your Architecture 账号 : @solonjava (Solon Framework) 用途 : dev.to 第3篇文章（待发布） 定位 : 中立 J…
Spring Boot MCP Server in 2026: The Transport Trap That Wastes Your Weekend
I spent an afternoon staring at "connection refused" on my first MCP server. The fix was one config line. Here's what no README tells you upfront. Wha…
Building Distributed Data Processing with Spring Batch 6 + Spring Boot 4
When people first use Spring Batch, they usually start with a simple single-threaded job. That works for small datasets, but once data volume grows, t…
Your @EventListener Fires Before the Transaction Commits⚙️
Your domain event fires. Your notification service queries the DB for the entity that just got saved. It finds nothing. You add a log line. It starts …
Sprout: a Spring-style, Spring-compatible framework for building AI tooling in Java
Your backend already exists. It runs on the JVM, it has services, configuration and tests, and increasingly it needs to do AI things — call a model, e…
EC2 vs ECS for Spring Boot Deployment — When Should You Use Which?
Building a Spring Boot application is only half the journey. At some point, every backend project reaches the next question: Where should this applica…
Beyond the Cache Miss: Designing Resilient Caching Layers with Redis Degradation Strategies
1. The Anatomy of a Cache Disaster To design a solution, we must first analyze how cache failures manifest as systemic outages. Consider a standard re…
From TLEs to Real-Time Satellite Tracking: Building an Orbital Backend with Spring Boot and Orekit
I've worked on projects where getting the right data was the bottleneck. You can't build features without data, and sometimes the data just doesn't ex…
Spring Boot 3.2 + Testcontainers: Reliable Integration Testing with Real Dependencies
Spring Boot 3.2 + Testcontainers: Reliable Integration Testing with Real Dependencies Without Testcontainers, your integration tests might pass locall…
Spring Security 7: MFA, Modular Config, and What Breaks
Spring Security 7 dropped at Spring I/O 2026. Daniel Erno from the Spring Security team gave a talk covering the biggest changes. Here's what matters …
Spring Security 7: MFA, Modular Config, and What Breaks
Spring Security 7 dropped at Spring I/O 2026. Daniel Erno from the Spring Security team gave a talk covering the biggest changes. Here's what matters …