Software engineer · Fintech & AI agents
I build systems where real money moves — and AI agents that run real operations.
Sérgio Camillo Jr
15+ years of software engineering. Fintech, mission-critical systems and LLM agents in production.
15+
years of engineering
US$ 4M+
processed in the fintech I founded
40+
AI agents in production
100+
projects delivered as CTO
About
I am a software engineer focused on fintech and AI systems in production. I founded PayPix, a cross-border payments platform selected by Antler, where I architected the entire backend — transactional schema, PSP integrations, webhook security — and we processed more than US$ 4 million in the first year. Today I build LLM agents that automate real operations through WhatsApp, voice and integrations with CRMs, ERPs and payment APIs. No demos: production from day one.
Cases
- Fintech
PayPix — cross-border fintech
I founded and led the technology of an international payments platform using Pix and cards. Full backend, BCB compliance, US$ 4M+ processed in the first year.
- Critical systems
Bradesco Consórcios IVR migration
I led the complete migration of the telephony system of one of Brazil's largest banks within a 3-day window — real-time architecture with WebSockets, high availability, delivered on time.
- AI agents
AI agents in production
40+ LLM agents (LangChain, CrewAI, n8n) automating support, sales and scheduling over WhatsApp and voice — 6,000 conversations/month, 64% reduction in response time.
Want to learn how to build AI applications?
At Fábrica de Agentes I teach hands-on how to build AI agents and LLM applications — from zero to production. The same approach I use in real projects.
Explore the courses →Contact
Tell me about your project and I will reply personally.