Hi, I'm Leoni Frazão
BST Student at UFABC | Focused on Backend Engineering and Systems Automation.
I build systems that solve real-world problems: from public education tools to geopolitical OSINT pipelines. I prioritize Hexagonal Architecture, Clean Code, and Defensive Programming.
🚀 Featured Projects
MoraNode
A multi-tenant real estate management system.
Tech Stack: Spring Boot 3.4+, Java 21, Apache Kafka, PostgreSQL, React 19.
Key Engineering: Implemented Hexagonal Architecture (Ports & Adapters) for strict domain isolation.
Event-Driven: Uses Kafka for real-time property availability invalidation when contracts are finalized.
Reliability: 45+ unit tests, green CI/CD pipeline, and synchronized TypeScript types via OpenAPI.
Argos
Visual compliance and PPE detection with multi-tenant RAG.
Tech Stack: Python 3.12, YOLOv8, ChromaDB, Gemini 1.5 Flash.
Privacy-First: Implements where=company filtering in vector retrieval to prevent cross-tenant hallucinations.
Resilience: Structured with Pydantic outputs and exponential backoff retries via Tenacity.
Parallax
OSINT pipeline for geopolitical narrative analysis.
Tech Stack: FastAPI Microservices, Ollama (Local LLM), RapidFuzz.
Innovation: Performs wire story deduplication using token set ratios to map narrative drift.
Security: Local-first LLM processing ensuring zero cloud data egress.