Hello, my name is
Josenaldo Matos
Senior Full Stack Engineer. 20+ years. Java, Spring Boot, React, TypeScript.
About Me
Core Stack
Backend
Frontend
Databases
Architecture
Testing
AI & Productivity
DevOps & Tooling
Agile
Blog
Context Engineering: como transformar agentes de IA em desenvolvedores confiáveis
Guia completo do Estágio 1 ao Estágio 3 para transformar uso de agentes de IA em um sistema previsível, com contexto estruturado, skills e memória de projeto.
Como escrever o seu currículo como desenvolvedor
Um guia completo para estagiários, juniores e plenos com pouca experiência que querem montar um currículo que passa pelo ATS e chama a atenção do recrutador.
AI and Developers: Another Brick or Another Floor?
AI will shake the market — that much is certain. Whether it walls developers in or elevates them depends on a timescale most people forget to consider.
The first draft of Programação Orientada a Gambiarra
A short update on my first complete draft, and what this book is really about.
Interfaces aren't villains
A technical and architectural analysis on the value of defining explicit contracts even when there's only one concrete implementation.
Why am I still invisible?
Why, despite being qualified, am I still invisible to the job market?
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Portfolio
A multi-repository medical education platform I led from July 2024 to February 2026, modernizing architecture, delivery flow, and product capabilities across API, admin panel, and student-facing frontend.
A full editorial platform for a living technical book — built with Next.js, Contentlayer, and a Git-based publishing pipeline to write, version, and ship content continuously.
A signature recipe turned into a memorable portfolio artifact: a repeatable culinary product with intentional humor and strong personal branding.
A curated learning roadmap for Git and GitHub, combining Portuguese and English resources to help developers build practical version-control skills.
A minimal React + Vite starter template with environment setup and standard scripts for fast project bootstrapping.
A full-stack platform with Java/Spring backend and Next.js 15 frontend, supported by ADRs, architecture standards, and product documentation for sustainable evolution.
Services
Web Development
Modern, accessible, and performant web apps with React and Next.js — from MVPs to production hardening.
Backend & APIs
Reliable APIs, integrations, and data flows (Java/Node.js), with pragmatic testing and observability.
Architecture & Tech Leadership
System design, tradeoff analysis, technical roadmaps, and helping teams ship consistently with good engineering practices.
Mentoring & Code Reviews
Pairing sessions, reviews, and coaching focused on clarity, maintainability, and building a strong developer mindset.
Testimonials
Bugada
Gata
“Miau.”
Leão Lascado
Leão empalhado
“Não faço a mínima ideia de como vim parar aqui.”
Lesada
Gata
“Miau miaaaaaau! Fsssssst!”