The Dev World – Sergio Lema
Isolate Bugs Faster Using the Dichotomy Method
How I Ship Code When AI Writes 80% of It
Optimizing Frontend Autocomplete for Scalable Search Engines
Why Your Code Isn’t Broken, But Your Data Is
Optimizing Frontend Tables: Why Client-Side Processing Is Not a Strategy – Part 1
Optimizing Your Context Window: How to Stop Burning Tokens in Python Projects
How to Synchronize Read and Write Databases in a CQRS Architecture
Stop Being an AI Babysitter: How to Use LLMs Without Losing Code Ownership
Centralizing Pricing Logic: Stop Scattering Your Business Rules
Why AI Won’t Replace Developers Who Lead the Tool
Modern State Management in React: Stop Using Redux for Server Data
Structured Logging in Java Microservices: SLF4J, MDC, and Distributed Tracing in Practice
Why I Stopped Calling Myself a Full-Stack Developer
The Saga Pattern: Managing Distributed Transactions Without Losing Your Mind
Why AI is Replacing Junior Developers and How Mid-Level Engineers Can Survive
Choosing the Right AI Coding Agent: Claude Code vs. GitHub Copilot vs. Gemini Code Assist
Why You Should Never Use Floating Point for Money
Optimizing Search Performance with CQRS: Relational Writes and NoSQL Reads
Granular Authorization in Spring Boot: Beyond Role Checks
Making Testcontainers Work with Lima on macOS
Event-Driven Architecture with Spring Boot and AWS EventBridge: Escaping the Distributed Monolith
Google Cloud Run Limitations: When Serverless Complexity Outweighs the Cost Savings
The Command Pattern in Java: Eliminating Fat Service Classes with Commands and Handlers
Spring Security 6 OAuth 2.1: Replacing Implicit Grant and ROPC with PKCE
Why JavaScript Floating Point Math Breaks Your App (And How to Fix It)
Fullstack 2026: Building the Modern Spring Boot 3.4 and React 19 Architecture
The JVM Stack: A Developer’s Quick Guide
Choosing a Deployment Strategy: A Developer’s Guide to Canary, Blue-Green, and Rolling Updates
Google Sign-In for React Native: The Complete Setup Guide That Actually Works
Spring @Transactional is Not Magic: The Proxy Trap and Why Your Data Isn’t Safe
The Microservices Tax: Why Your Distributed Architecture is Failing You
The Singleton Delusion: Why Your Implementation is Probably Broken
How to Use System Design in Your React Project
“AWS EC2: Unable to Connect,” a Security Group Checklist for Developers
Why Your Team Needs a Leader, Not Just More Developers
SLF4J, Logback, and Log4j: A Straightforward Guide to Java Logging
Flyway vs. Liquibase: Which Database Migration Tool is Right for You?
VM or Container? The Developer’s Guide to Choosing the Right Isolation
A Three-Step Framework for Launching Your Project
Centralized Error Handling with React useContext
The Art of Prompting for a Developer
The No-Code Backend