São João da Boa Vista · SP · Brazil
I'm Hamilton Tumenas Borges — chef, lawyer and software developer. Not out of indecision, but genuine curiosity. Each field left marks that, seen from a distance, form a path that makes perfect sense.
I worked in the kitchen of the InterContinental São Paulo, opened my own restaurant, earned a law degree and practiced as a lawyer. When technology crossed my path, I found the language that ties it all together: solving problems with precision and creativity.
Today I build systems with Ruby on Rails, working on complex integrations, automation and applied AI. I still believe that growing and helping others grow is what gives meaning to anything you do.
Centro Universitário Senac · Águas de São Pedro, Brazil
Kitchen and food & beverage at an international-standard hotel.
Garde manger. High demand, technical rigor and precision.
Full restaurant management: menus, staff and day-to-day operations.
UNIFEOB · São João da Boa Vista, Brazil
Civil, criminal and child protection law. Partner counsel to the Public Defender's Office of the State of São Paulo.
The law is the expression of the general will.
— Declaration of the Rights of Man and of the Citizen, 1789UNIFEOB · São João da Boa Vista, Brazil
Systems Analysis and Computer Science programs.
Anhanguera Educacional
Internal systems, ERP and marketplace integrations, ETL, data analysis and e-commerce.
Health management platform built with Rails 8, AI integrations (OpenAI), Hotwire/Turbo and a multi-user system with multi-factor authentication.
A selection of systems built along the way — from kitchens to APIs.
Health management platform: medical exams, biomarkers and communication between patients, doctors and laboratories. Multi-user system with MFA.
▸ in production since 2025, connecting patients, doctors and labs
zumisaude.com.br →Full e-commerce for a brick-and-mortar store. Catalog, orders, marketplace integration, admin panel and reporting.
▸ in production — store and marketplace orders in a single panel
lojagrings.com.br →E-commerce with product catalog, order management and admin panel.
▸ in production, with order operations running through the panel
mimoprati.com.br →E-commerce with inventory management, orders, POS, payment methods and Bling ERP integration.
▸ in production — physical-store POS and e-commerce sharing one inventory
bulloleo.com.br →ETL pipeline consolidating data from multiple ERPs and marketplaces. Extraction, normalization and load for analysis with DuckDB and Apache Superset.
▸ data from multiple sources consolidated into Superset dashboards
Family finance tracker with AI-powered automatic transaction categorization, monthly reports and bank statement imports.
▸ in daily use — statements categorized automatically by AI
Internal technical support system with ticket creation, triage and real-time tracking via ActionCable broadcast.
▸ in internal use, with tickets updating in real time
Internal inventory control for retail operations: inbound, outbound, transfers between branches, stock counts and label printing.
▸ in daily use across a multi-branch retail operation
A collection of handy developer tools: Brazilian NF-e access key parser, fake data generator and other utilities.
dev-utils.h6n.com.br → github →Study project: scraping listing data from Mercado Livre with a microservices architecture — JWT authentication, async scraper, e-mail notifications and CI/CD with GitHub Actions.
github →— plus a few others that live only in production.
São João da Boa Vista, Brazil
To whom it may concern,
If you'd like to talk about a project, a partnership, a position or simply trade ideas — feel free to write, no formalities needed.
Sincerely,
Hamilton Tumenas Borges
Chef · Lawyer · Developer