Luis Fonseca

Full Stack Developer

Software developer with a degree in Systems Analysis and Development. I work with Python, integrations and internal systems — from the database to deployment.

Have a project in mind? Send me the details and I'll come back with a timeline and a price. If you're hiring, the full resume is below.

Stack

Python · FastAPI · PostgreSQL · React · Next.js · TypeScript · Docker · Linux · LLM

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What I do

Services

Process automation

Your team stops losing hours to repetitive work. Spreadsheets, reports, data entry and checks run on their own, faster and without mistakes.

See examples10 solutions

Websites and custom systems

Websites that bring in customers and systems that keep the operation organised, built the way your company works. For when the spreadsheet can't keep up and off-the-shelf software doesn't fit.

See examples15 solutions

Applied artificial intelligence

AI working for your business: it answers customers, reads documents and replies based on what the company already knows, at any hour.

See examples12 solutions

Dashboards and BI

Your company's numbers in one dashboard, always up to date. Track sales, costs and targets without building spreadsheets, and everyone sees only what they need.

See examples12 solutions

Open source systems

Professional tools with no licence fees, installed and maintained for you. The company saves on every user and the data stays yours.

See examples16 solutions

Portfolio

Delivered projects

Client work (7)

Liftam Saúde e Estética

Company website

Company website with an admin panel, results gallery and blog.

Next.js · FastAPI · MySQL · VPS

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Grupo Salus

Internal platform

Ticket portal, audience segmentation, embedded BI and a document hub with AI classification.

FastAPI · React · MySQL · LLM

Private system

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Sorridents

Landing pages on demand

Campaign and service pages, published on demand across the network.

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GIO Estética Avançada

Voucher e-commerce

Procedure voucher store for a 193-unit network, with transparent checkout and redemption at the franchise.

Next.js · FastAPI · PostgreSQL · Redis

Coming soon

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Lais Rodriguez Yoga

Company website

Company website and lead capture page.

Next.js · TypeScript

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Refrigeração Fidelis

The 106 exercises from Worlds 1, 2 and 3 of Curso em Vídeo in a desktop interface, graded automatically through the OpenAI API.

Python · customtkinter · OpenAI API

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Open source

claudecode-usage-widget

A desktop widget with Claude Code usage limits in real time, with no external dependencies.

Python · PowerShell · Windows

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Projects under contract appear without a link when the code is private.

Who has hired me

Contact

Let's talk about your project

Tell me what you need. I reply with a timeline and a price, no strings attached.

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