const ewerton = {
role: "Software Engineer · AI & Full-Stack",
experience: "4.5 yrs shipping production ERP & fiscal software",
education: "Information Systems · UFRN",
building: ["AI-powered SaaS", "multi-agent systems", "MCP servers"],
stack: ["Python", "TypeScript", "FastAPI", "React/Next.js", "PostgreSQL"],
openTo: "Remote roles · US / EU timezones",
reach: "ewertoncom297@gmail.com"
};Software Engineer (Delphi) · Viggo Sistemas · 2022 – Present (~4.5 years)
Viggo Sistemas is a GPTW-certified Brazilian software company whose commercial-automation ERP serves 1,200+ businesses across 13 states.
Part of a 3-engineer team, building and operating the ERP end-to-end:
- 🧾 Brazilian fiscal engine — e-invoicing (NF-e, NFC-e, MDF-e) and SPED / tax-reform logic. Software where a bug means a client legally can't sell.
- 🛠️ Backend & APIs — features, integrations and REST APIs in Delphi, on top of a large legacy codebase I maintain, refactor and improve.
- 🗄️ PostgreSQL — owning the production database for 4+ years: schema, queries, performance and data integrity.
- 🤖 AI-first workflow — today I ship with Claude + modern engineering practices, keeping Delphi for legacy / manual operations.
Coming from software where mistakes are expensive — money and tax compliance — shaped how I build: carefully, and tested where it counts.
| Project | Stack | What it does |
|---|---|---|
| 🦷 recepia | FastAPI · PostgreSQL · Groq LLM · WhatsApp | Multi-tenant SaaS: an AI WhatsApp receptionist for clinics — live demo ↗ |
| 🔌 evolution-whatsapp-mcp | TypeScript · MCP SDK | MCP server exposing WhatsApp (Evolution API) as tools for Claude & any MCP client — on npm ↗ |
| 🤖 Monarch-IA | Python · FastAPI · Claude API · Docker | Multi-agent orchestration on the Claude API, with human-in-the-loop approval gates |
| 🎓 Liveaula | Next.js · Fastify · Prisma · React Native | Full-stack EdTech monorepo (web + mobile + API) |