Real software, not mockups
If the real thing can be built, I build the real thing. A pretty demo wired to nothing is debt dressed up as delivery.
ABOUT ME
Andressa Cabral
Software Engineer · AI & Automation · AI Protocol
I build products end to end: Node and TypeScript APIs behind React and Next.js interfaces, AI agents that do real work, and automations that run on their own 24/7. I founded AI Protocol to ship that as product, not as slideware.
Today the focus is LeadIn — a WhatsApp CRM that sees Meta's 24-hour window before it closes — and AI Protocol's B2B prospecting product line. Before that, Web3: dApps, NFTs and contracts, which is where my taste for systems that must be right the first time comes from.
AI PROTOCOL
Andressa
Cabral
Software Engineer · AI & Automation
STACK
TypeScriptNext.jsNode.jsPythonPostgreSQL
github.com/0xdev3dl
How I work
The number has to show
Cost per conversation, response time, error rate. A system that hides its own numbers is a system nobody trusts.
Official APIs, always
WhatsApp, Meta, payments. Workarounds hold until the platform changes — and then the client pays for it.
Phased delivery, clear scope
Open scope becomes an eternal project. I'd rather ship a short phase and make the next decision with information.
How I got here.
01 · Web3
Web3 & dApps
Front-ends for decentralized applications, NFTs and tooling for Web3 project organization — including contributions to Web3Task, an open project for on-chain task management.
02 · AI Protocol
Founding AI Protocol
I started AI Protocol to deliver software, automation and AI as custom product — from database to deployment, without outsourcing the hard part.
03 · Protocolo SDR · Signal OS
AI-driven B2B prospecting
Two pieces of the same thesis: find the right company and reach it with the right message. Protocolo SDR attacks where the data comes from; Signal OS attacks the order of the queue.
04 · Sales Automation · Landing Pages
A funnel that runs itself
Closing the loop after first contact: page, PIX checkout, payment confirmation and follow-up that reacts to lead behavior.
05 · LeadIn
LeadIn — WhatsApp CRM
The most recent and the densest: a full CRM on top of Meta's official API, built around a number nobody was watching — the 24-hour window.
What I build with
TypeScriptNext.jsNode.jsPythonPostgreSQLClaude
AI & Agents
ClaudeGPTLangGraphMCPRAGPrompt engineeringEvals
Frontend
ReactNext.jsTypeScriptTailwind CSSMotionHTML5CSS3Flutter
Backend
Node.jsPythonREST APIsWebhooksAuth & permissõesPHP
Automation
n8nWhatsApp Cloud APIMeta Graph APIPIXFilas & retryCron
Data & Infra
PostgreSQLSupabaseMySQLDockerLinuxVercelGit
Web3
dAppsNFTsDeFiCarteirasContratos
Design & Product
FigmaDesign systemsUX de conversãoAcessibilidade