João Ferreira
Freelance Full Stack Engineer AI Consultant at several companies
Santos, São Paulo, Brazil
Summary
👤
Senior🎓
Top SchoolJoão Ferreira is a seasoned Mobile Application Developer and Lead Engineer with over a decade of hands-on experience building large-scale, product-driven web and mobile platforms used by millions. He blends deep front-end expertise in React, React Native and TypeScript with full-stack experience across Node, Go, Java and .NET, and a strong emphasis on performance, scalability and developer experience. João has led engineering teams, owned frontend architecture for nationwide public platforms and ad-tech systems, and recently focused on shipping AI platforms that integrate LLMs into real products and embeddable agent widgets. He excels at defining technical standards, structuring monorepos and improving delivery through CI/CD and high-volume end-to-end testing. Based in Santos, Brazil, he combines pragmatic mentorship with hands-on coding and a track record of turning complex UX, data and automation requirements into reliable production systems. An uncommon strength is his experience migrating legacy frontends to modern component-driven architectures while keeping high availability for millions of users.
11 years of coding experience
12 years of employment as a software developer
Ensino Médio com Magistério High school. Child development, pedagogy, didactics, philosophy of education, related legislation., Ensino Médio com Magistério High school. Child development, pedagogy, didactics, philosophy of education, related legislation. at CEFAM (Specific Center for Teacher Training and Improvement)Human Resources Associate Degree Human Resources Management/Personnel Administration, General, Human Resources Associate Degree Human Resources Management/Personnel Administration, General at Universidade Paulista
English, Portuguese, French, Russian
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (42)
mod-manager9
bootstrap9
css9
sass9
html9
dos8
jekyll8
javascript8
ruby7
servicenow7
jekyll-theme7
gatsbyjs6
vscode6
github-pages6
npm-package6
Programming languages (8)
Github contributions (5)
johnylab/johnylab.github.io
Oct 2016 - Nov 2025
Site Johnylab
Contributions:10 reviews, 9 PRs, 251 pushes in 9 years 2 months
jekyll
WCAComex/wcacomex.github.io
Oct 2017 - Aug 2023
Inteligência em comércio exterior
Contributions:581 pushes, 1 branch, 5 comments in 5 years 11 months
php
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