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Software Engineer

Leonardo
Tonezi

8+ years delivering high-quality systems across healthtech, fintech, and SaaS. MBA in AI & Big Data. Designs and ships AI-driven, scalable systems — from LLM-powered backends and agentic workflows to Web3 integrations.

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About

Software Engineer with 8+ years delivering high-quality systems across healthtech, fintech, and SaaS. MBA in Artificial Intelligence & Big Data from Universidade de São Paulo (USP).

Designs and ships AI-driven, scalable systems — from LLM-powered backends and agentic workflows to Web3 integrations. Comfortable owning the full stack: architecture, implementation, DevOps, and UX.

Based in Florianópolis, Santa Catarina, Brazil. Available for remote work.

8+

Years
Experience

10+

Companies
& Projects

30+

Technologies
Shipped

5

Languages
Spoken

Skills

Languages

Python TypeScript JavaScript Go Rust C# PHP

Frontend

React Next.js React Native AngularJS React Flow

Backend

Node.js Django Flask FastAPI Laravel Symfony .NET Odoo/Frappe

DevOps & Cloud

Docker Terraform Ansible AWS GCP

Data & AI

PyTorch CNN / Computer Vision LSTM / RNNs Google Earth Engine LLM APIs Agentic Workflows Machine Learning Selenium BeautifulSoup

Databases & Tools

PostgreSQL Prisma Unity3D Smart Contracts

Career

2025 — NOW

Senior Software Engineer

StartupLandia / Scalafai

  • Led end-to-end build of WagePath — construction payroll platform automating prevailing wage compliance and certified payroll reporting
  • Led UX and frontend for an AI-driven OKR platform at Scalafai
  • Built interactive workflow visualizations with React Flow and TypeScript: custom nodes, edges, drag-and-drop editing
  • Translated LLM insights into clear UI — suggestions, summaries, chat

Next.js · TypeScript · React Flow · PostgreSQL · Prisma · GCP · AI Agents

LinkedIn ↗ Project ↗

2024 — 2025

MBA - AI & Big Data

Universidade de São Paulo (USP)

  • Thesis: Investigating the Relationship between Wildfires and Deforestation in Brazil Using CNNs and RNNs on INPE and Sentinel-2 Data
  • Built CNN (U-Net) for burned area segmentation from Sentinel-2 imagery — ~85% IoU
  • Built bidirectional LSTM with attention for temporal wildfire risk prediction — 0.12 RMSE
  • Developed hybrid CNN+LSTM model for comprehensive spatial-temporal risk assessment
  • Integrated Google Earth Engine for real-time satellite data access across Amazon and Cerrado biomes

Python · PyTorch · CNN · LSTM · Sentinel-2 · Google Earth Engine · FastAPI · INPE Data

LinkedIn ↗ Project ↗

2023 — 2025

Software Engineer

Jaycon Systems · Florida, USA — Remote

  • Led feature delivery and bug fixes for the ProductHubb platform
  • Enhanced a Go-based system, automating deployment with Terraform and Ansible on AWS
  • Improved ERP platform using Python and Frappe framework
  • Contributed to a Unity3D device testing project

Node.js · React · TypeScript · Go · Python · Terraform · Ansible · AWS

LinkedIn ↗ Project ↗

2022 — 2024

Mid-Level Software Engineer III

AdviceHealth · Florianópolis

  • Maintained and improved legacy PHP/Angular system — contributed to 3× company growth
  • Helped build a new platform from scratch using Python and React
  • Led code reviews and orchestrated production deployments with minimal downtime

Python · Flask · Django · ReactJS · AngularJS · PHP

LinkedIn ↗ Project ↗

2021 — 2022

Mid-Level Software Engineer

HandsOnYourDigitalTransformation · São Paulo

  • Built and maintained full-stack applications for multiple clients
  • Projects ranged from AR/VR apps to chatbots and management systems

React.js · Angular.js · React Native · Laravel · Symfony · Django · Flask

LinkedIn ↗

2020 — 2021

Junior Developer Analyst

LUZ Engenharia Financeira · São Carlos, SP

  • Web-scraping and data team feeding the MITRA financial platform
  • Enhanced data extraction processes with Python
  • Improved applications in Delphi and C# .NET; implemented Docker for containerization

Python · Django · Selenium · BeautifulSoup · Delphi · C# .NET · Docker

LinkedIn ↗

2019 — 2020

Chatbot + Unity3D Developer

UNIVEM · Marília, SP

  • Developed a chatbot for Nestlé machine maintenance using LUIS and QnA Maker
  • Engineered a VR training system for Nestlé's production line in Unity3D

React Native · LUIS · QnA Maker · Unity3D · C#

Project ↗

2019

Lead Unity3D Developer

OrçaPá · Marília, SP

  • Developed VR solutions for the construction and architecture market

Unity3D · C# · VR

LinkedIn ↗

2018 — 2019

Scholarship Researcher

Stratelli — FAPESP · Marília, SP

  • Research: Fusion of Data from Human Reports for Criminal Analysis
  • Applied Machine Learning, Data Mining, and Full-Stack Web Development

Python · Machine Learning · Data Mining

2018

Odoo Developer

Gigliotti Tech · Marília, SP

  • Developed Odoo projects based on Python

Python · Odoo

Contact

Open to senior and lead engineering roles, interesting consulting projects, and AI/Web3 collaborations.

EMAIL leoademir0@gmail.com LINKEDIN linkedin.com/in/leotonezi