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Software Engineer
Leonardo Tonezi

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

8y xp AI / ML Python | JS | Rust DevOps
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About

Leonardo Tonezi

I build systems that hold up when it matters — across healthtech, fintech, and SaaS, for the past 8 years. I hold an MBA in AI & Big Data from USP, where I trained satellite-imagery models to predict wildfires across the Brazilian Amazon.

What drives me is the idea that a product can genuinely solve a problem that matters, something that improves lives and makes the next generation's work a little easier. I care about the architectural choices that make that possible, and about the kind of environment where ideas are welcomed and built on. That's the real upside of working on a great team

Based in Florianópolis, Brazil. Open to remote roles, consulting, and worthwhile collaborations.

8+

Years
Experience

10+

Companies
& Projects

30+

Technologies
Shipped

5

Languages
Spoken

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 Live Demo

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

Projects

Wildfire Risk Prediction — Brazil

Personal

Hybrid CNN+LSTM model for spatial-temporal wildfire risk assessment across the Amazon and Cerrado biomes using Sentinel-2 satellite imagery and INPE data.

~85% IoU on burned area segmentation · 0.12 RMSE on temporal prediction

Python PyTorch U-Net CNN LSTM Google Earth Engine FastAPI
GitHub

Safia — AI OKR Platform

Professional

AI-powered OKR & work acceleration platform (Austin, TX — pre-seed). Built interactive objective/workflow graphs with React Flow and TypeScript — custom nodes, edges, drag-and-drop editing. Owned the design system and accessibility. Implemented AI-driven UI features surfacing LLM suggestions, summaries, and chat. Optimized via virtualization, memoization, and code-splitting.

Led UX + frontend end-to-end · shipped full product at pre-seed Scalafai

React TypeScript React Flow LLM Prompt Engineering Ruby on Rails

WagePath — Payroll Compliance

Professional
Private

Construction payroll platform automating prevailing wage compliance and certified payroll reporting for general contractors and project managers.

Automated compliance workflows — eliminated manual payroll reconciliation

Next.js TypeScript PostgreSQL Prisma GCP

ProductHubb Platform

Professional

Full-stack product lifecycle management platform for hardware and IoT teams, with Go-based backend and IaC-automated infrastructure on AWS.

Led feature delivery + IaC migration — Terraform/Ansible pipeline on AWS

Node.js React TypeScript Go Terraform AWS

AdviceMed — Healthtech B2B SaaS

Professional
Private

Proprietary healthtech platform that digitizes and manages the full lifecycle of medical board proceedings (junta médica) for Brazil's supplemental health sector. Handles the complete dispute-resolution workflow between healthcare providers and insurers — documentation, process stages, and deadline tracking in compliance with ANS regulations.

Digitized a previously paper-heavy regulated process for the Brazilian supplemental health market

PHP PostgreSQL Python Django React

Amigo Agiota

Personal

Subscription payment tracker — owners create shared plans, invite participants, and participants upload proof of payment each month. Owner reviews and approves. No more chasing people on WhatsApp.

Eliminates the split-payment coordination problem — clear status for every participant, every cycle

React TypeScript Node.js PostgreSQL Prisma Zod Vercel Blob Playwright

Sonic Library

Personal

Full-stack digital library platform where users can browse books, track their reading, write reviews, and receive AI-powered recommendations based on their reading history.

End-to-end reading platform with personalized AI recommendations via LangChain + OpenAI

FastAPI Next.js TypeScript PostgreSQL LangChain Semantic Versioning
GitHub

Sandslash — SEO Audit CLI

Personal
Private

Async SEO auditing CLI built in Rust — crawls sites, runs structured checks, and emits scored JSON reports. Powered by Tokio for concurrency and Redis for caching.

Fast async crawler with structured scored audit reports — built in Rust for maximum throughput

Rust Tokio Redis CLI Async
GitHub

Pet Tamagotchi — Solana

Personal
Private

On-chain pet caring game built on Solana PDAs — tamagotchi-style interactions with game state stored entirely in program-derived accounts using the Anchor framework.

Fully on-chain game state via Solana PDAs — zero off-chain storage

Rust Solana Anchor Web3
GitHub

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 ★
Cloud Practitioner Certified
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

Contact

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

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