Josenaldo Matos
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Hello, my name is

Josenaldo Matos

Senior Full Stack Engineer. 20+ years. Java, Spring Boot, React, TypeScript.
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Josenaldo Matos

About Me

Senior Full Stack Engineer. 20+ years. Java, Spring Boot, React, TypeScript.I've modernized legacy platforms, led migrations to microservices, and shipped multi-app ecosystems supporting 200k+ users — always remotely, always with ownership.I write, mentor, and make a very good farofa.

Core Stack

Java
Spring Boot
Node.js
React
TypeScript

Backend

Hibernate
REST
Spring Data JPA
Spring Security
JWT
BullMQ

Frontend

MUI (Material UI)
Next.js
Tan Stack Query
Zod
Mantine
React Hook Form

Databases

MySQL
Sequelize
PostgreSQL

Architecture

Clean Architecture
SOLID
Microservices
Domain-Driven Design
Hexagonal Architecture
Event-Driven Architecture

Testing

JUnit
Mockito
TDD
Jest
React Testing Library

AI & Productivity

Prompt Engineering
GitHub Copilot Agents

DevOps & Tooling

CI/CD
Git
Docker
GitHub Actions

Agile

Mentoring
Technical Leadership
Scrum
Kanban

Blog

AI Didn't Organize My Life. It Helped Me Get My House in Order
OPINION
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AI Didn't Organize My Life. It Helped Me Get My House in Order

I didn't build a cyberpunk workflow that reads my emails for me. I used AI to unlock real work: refactoring, tests, documentation, and projects I had been postponing for far too long.

16/03/2026
Josenaldo Matos
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A IA não organizou minha vida. Ela me ajudou a arrumar a casa

Não criei um workflow cyberpunk que lê meus e-mails por mim. Usei IA para destravar trabalho real: refatoração, testes, documentação e projetos que eu vinha adiando havia tempo demais.

16/03/2026
Josenaldo Matos

Escreva em português: o gargalo da IA não é o idioma, é a sua expressividade

Por que desenvolvedores brasileiros produzem instruções melhores para agentes de IA quando escrevem na língua em que pensam — e por que forçar inglês pode estar piorando seus resultados.

15/03/2026
Josenaldo Matos

A pastelização do desenvolvimento de software

A IA transformou parte do software em pastel de feira: rápido, barato e bom o suficiente. O ponto não é o fim dos restaurantes — é saber quando pastel resolve e quando precisa de camarão na moranga.

04/03/2026
Josenaldo Matos

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.

04/03/2026
Josenaldo Matos

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.

24/02/2026
Josenaldo Matos

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Experience

Portfolio

MedEspecialista Platform (API + Admin + Frontend)
MedEspecialista Platform (API + Admin + Frontend)

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.

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Workaround-Oriented Programming (Book)
Workaround-Oriented Programming (Book)

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.

Farofa Lampiao e Julieta
Farofa Lampiao e Julieta

A signature recipe turned into a memorable portfolio artifact: a repeatable culinary product with intentional humor and strong personal branding.

Learning Git and GitHub
Learning Git and GitHub

A curated learning roadmap for Git and GitHub, combining Portuguese and English resources to help developers build practical version-control skills.

Vite JavaScript React Minimal Template
Vite JavaScript React Minimal Template

A minimal React + Vite starter template with environment setup and standard scripts for fast project bootstrapping.

MapEFI Platform
MapEFI Platform

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

Bugada

Gata

Miau.

Leão Lascado

Leão Lascado

Leão empalhado

Não faço a mínima ideia de como vim parar aqui.

Lesada

Lesada

Gata

Miau miaaaaaau! Fsssssst!

Get in touch

I'm always open to discussing new projects, creative ideas or opportunities to be part of your visions.

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