Hello, I'm

Judson Cairo

Senior Fullstack Engineer

Remote-first and aligned with US business hours. 10+ years and 40+ products shipped end-to-end with React, Next.js, Node.js and TypeScript - I own features from UI to database and ship without hand-holding.

Brazil (UTC-3)
Real-time overlap with US & EU
English B2
Async-first

Let's Talk See What I've Built

portfolio.ts

const developer = {

name: "Judson Cairo",

role: "Senior Fullstack Engineer",

experience: "10+ years",

location: "Brazil (UTC-3)",

availability: "Remote · US overlap",

english: "B2",

stack: [

"React", "Next.js",

"Node.js", "TypeScript"

shipsWithoutHandHolding: true

};

Years Shipping Code

Projects Shipped

Technologies

Happy Clients

FeaturedProjects

Real problems solved with real code

★ Featured

+2 photos

Route Orchestrator

Route optimization (TSP) · 70+ daily stops · real driving distances

Logistics tool that geocodes raw addresses and solves the TSP to turn 70+ daily delivery stops into the shortest real-world driving route. Next.js 15 PWA with an interactive map, plus a Python geocoding/optimization engine. Private, login-gated internal app used in daily operations.

Next.js React TypeScript MapLibre GL +5

View Project →

★ Featured

+2 photos

Arauto — Pastoral AI Assistant

Custom RAG (LangGraph + pgvector) · live SaaS with subscription tiers

AI sermon-prep assistant for pastors and ministry leaders (formerly KeryxAI). Turns sermon audio into study guides, weekly WhatsApp reflections and a source-citing church chatbot; custom RAG (LangGraph + pgvector) with credit-based billing. Live at arautoai.com.br.

TypeScript Node.js Python React +2

View Project →

★ Featured

+4 photos

Louvando

Offline-first PWA · semantic search · in production since 2019

Worship resources platform built to serve church communities. Provides a comprehensive song database with search by title, number, or lyrics, chord sheets with real-time transposition, display modes, and a projection module for live services. Evolved from a simple React app in 2019 to a full ecosystem.

React Next.js Node.js TypeScript +1

View Project →

See all projects →

Tools IShip With

Battle-tested in production. Not just tutorials.

🖥️

Frontend

React Next.js TypeScript TailwindCSS HTML/CSS Astro

⚙️

Backend

Node.js Fastify PostgreSQL MongoDB Redis REST APIs GraphQL

🚀

DevOps & Tools

Docker CI/CD AWS Vercel Git Linux GitHub Actions

How IWork

A clear process so you always know what's happening

🔍

Discovery

We define what success looks like - your goals, your users, your constraints - before writing a single line of code

🎨

Design

Wireframes and visual direction - we align on the experience before building it

💻

Development

Working software every 1-2 weeks. You review, I adjust. No big reveals at the end

🚀

Delivery

Performance-tested, deployed, and documented - ready for your team to run with

Frequently AskedQuestions

Are you available for remote work?

Yes - remote-first is how I work. I'm open to full-time roles, staff augmentation and contract projects. I own features end-to-end across the stack (UI, frontend, backend, APIs, databases, deployment), so I plug into a team and ship without constant hand-holding.

What's your core tech stack?

React, Next.js, TypeScript, Node.js, and PostgreSQL. I also work with Tailwind CSS, Prisma/Drizzle, Fastify, Docker, and Python. Lately a lot of my work is AI-powered SaaS - RAG pipelines and LLM agents. I pick the right tool for the job, not the trendiest one.

What time zone are you in, and how much overlap do we get?

I'm in Brazil (UTC-3) - real-time overlap with US East Coast business hours and European mornings, with no 12-hour handoff gap. I work async-first: clear written updates, shared boards, and live calls during overlap when needed.

How's your English?

Professional working proficiency (B2). I'm strongest in written, async communication - clear PRs, docs, and updates - and comfortable on calls during overlap hours.

Do you support what you build after launch?

Yes. I stay accountable for what I ship - bug fixes, performance monitoring, security updates, and new features. I treat the product like my own and care about it past the first deploy.

Blog

What I'm learning, building, and thinking about

March 10, 2026

Building Scalable APIs with Node.js and Fastify

Learn how to build fast, scalable REST APIs using Node.js with the Fastify framework and TypeScript.

Node.js TypeScript Tutorial