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jbarretojr/README.md

Hi, I'm José Barreto! 👋

Software Engineer | 8+ years building products for Fintech, Edtech & Lawtech

Typing SVG

LinkedIn Gmail GitHub

🧭 About Me

Over the past eight years, I've had the opportunity to work on products that are part of many people's daily lives. I've developed solutions across various sectors, participating from architecture definition to the delivery of functionalities used by hundreds of thousands of users.

  • 🔭 Responsible for developing a Flutter application with over 700k+ active users
  • 🌱 Pursuing a Postgraduate degree in Artificial Intelligence (UTFPR)
  • 💳 Implemented full banking integrations: PIX, TED, Boleto, mPOS
  • ⚙️ Experienced in software architecture, microservices, and DDD best practices
  • 📫 Reach me at: jbarretosantosjr@gmail.com

🛠️ Stack & Tools

Languages
JavaScript TypeScript Java Kotlin PHP Python Dart C++



Frameworks & Libraries
React Flutter Angular Vue NestJS Laravel Go



Databases
PostgreSQL MySQL MongoDB Redis DynamoDB/AWS



DevOps, Cloud & Observability
Docker AWS Terraform Linux Git Grafana Kibana

💼 Work Experience

2022 — 2026       Senior Full Stack Developer @ GRAN (Edtech)
                  ↳ Educational app with 700k+ active users
                  ↳ Scalable architecture with Flutter, Node.js, and Laravel

2020 — 2021       Full Stack & Mobile Developer @ Serveloja (Fintech)
                  ↳ Digital account and payments app
                  ↳ Banking integrations: mPOS, PIX, TED, Boleto

2018 — 2021       Full Stack & Mobile Developer (Freelance)
                  ↳ Delbank (Fintech) — mobile banking app built from scratch
                  ↳ Calculaw (Lawtech) — automated legal calculation system
                  ↳ IOHCARE (Healthtech) — medical records management
                  ↳ ARAH (ERP) — business management modules
                  ↳ CI/CD pipelines and AWS infrastructure

2017 — 2018       Project Advisor @ Quark's Up
                  ↳ Technological innovation in Electronic Engineering

🎓 Education

  • 🎓 Postgraduate degree in Artificial Intelligence — UTFPR, Cornélio Procópio (2025)
  • 🎓 Associate Degree in Systems Analysis and Development — Estácio, Brasília (2022)
  • 🎓 Bachelor's Degree in Electronic Engineering — UTFPR, Campo Mourão (2015)

🚀 Core Skills

Area Highlights
Technical Leadership Software architecture, Microservices, Performance optimization
Full Stack React, Flutter, Angular, Vue, NestJS, Fastify, Go, Laravel
DevOps & Cloud AWS (Lambda, S3, EC2, RDS, SQS), Docker, IaC, CI/CD
Data PostgreSQL, MySQL, MongoDB, Redis, DynamoDB
Observability Datadog, Grafana, Kibana
Other Payment integrations, Security best practices, Agile/Scrum, DDD

📫 Let's connect

LinkedIn Gmail

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