Samuel Nunes — Desenvolvedor Full Stack | Node.js, React, TypeScript, IA

// about

Beyond the code

I've been coding since I was 15, and professionally for over a year — but the complexity of what I build doesn't reflect a typical timeline. I work on AI agent ecosystems, multi-tenant SaaS platforms, and automation pipelines that run 24/7 in production.

My background spans the full lifecycle: API design, real-time systems, LLM integrations, workflow automation with n8n, infrastructure on AWS, and shipping products that real users pay for.

I'm also the founder of CVEngine — a SaaS product I designed, built, and launched independently. Open to remote opportunities with teams building ambitious things.

Node.js

TypeScript

NestJS

React

LangChain

AIAI Agents

MongoDB

PostgreSQL

Redis

Docker

AWSAWS

n8n

APIREST APIs

WSWebSockets

Stripe

WhatsApp API

// experience

Where I've worked

Jun 2025 — Present

Clínica Rigatti

Full Stack Developer

Designed and deployed 8 AI agents in production using function calling and LangChain — handling lead qualification, appointment confirmation, and patient triage autonomously via WhatsApp.
Architected 30+ n8n automation workflows running 24/7, including a multi-source lead qualification engine processing 7+ input channels with scoring, tagging, and intelligent routing.
Built a multi-channel lead recovery system with an intelligent follow-up queue (1h, 6h, 24h, 72h windows), anti-duplication logic, and automatic handoff to AI agent on response — across WhatsApp and SMS.
Implemented automated test suites covering critical platform modules including trigger flows, automated actions, and cross-module integration.
Implemented Meta Conversions API server-side with advanced parameters across all lead capture flows, enabling precise campaign attribution for paid traffic.

Node.js TypeScript React LangChain MongoDB n8n Docker AWS WhatsApp API

Jan 2026 — Present

CVEngine

Founder & Developer

Designed, built, and launched a SaaS product independently — from architecture decisions to payment integration and production deploy.
Engineered an AI pipeline that extracts structured data from job descriptions, scores profile compatibility (0–100), and generates ATS-optimized resumes tailored to each role.
Implemented real-time notifications via SSE, subscription plans with usage limits, Stripe checkout and webhook handling, and on-demand PDF generation with Puppeteer.

Node.js TypeScript LangChain OpenAI Stripe MongoDB SSE Puppeteer

// projects

Selected work

05 projects

Live product

CVEngine

AI-powered SaaS that analyzes job descriptions, scores your profile compatibility (0–100), and generates ATS-optimized resumes tailored to each specific role. Shipped as a full product with subscriptions, admin panel, and real-time notifications.

Node.js TypeScript LangChain OpenAI Stripe MongoDB SSE Puppeteer

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