Engineer with 6+ years building production systems that scale — from React and Flutter frontends to distributed backends on AWS and cloud-native platforms.
Currently at Olly Olly, designing and shipping AI-powered features for a platform serving ~4,500 business clients across ~20k monthly sessions. My work spans LLM pipeline engineering, event-driven architecture, and full-stack product development.
I like systems that are built to last: well-abstracted, observable, and ready to grow.
const joão = {
role: "Senior Full-Stack Engineer → targeting Staff",
location: "Belo Horizonte, Brazil 🇧🇷",
focus: ["AI Integration", "Distributed Systems", "System Design"],
building: "AI-powered workflows, scalable backends, cross-platform apps",
learning: "RAG / GraphRAG · AI Gateways · Advanced System Design",
};Languages
Frontend & Mobile
Backend & Infrastructure
AI & LLMs
Tooling
| ⚡ | Brought page Speed Index from ~27s → 2.8s via Cloudflare routing + cold-start warm-up strategy |
| 💸 | Cut LLM inference costs by ~75% through strategic model migration in production |
| 🤖 | Built end-to-end AI pipelines connecting content generation, app flows, and CRM ticketing |
| 🏗️ | Designed distributed integrations with Pub/Sub queues, parallel execution, and retry logic |
| 🧠 | Selected as 1 of 4 engineers to pioneer AI-assisted development (Claude Code) across the team |
| 📐 | Consistently author design docs before implementation — schema, permissions, orchestration |
