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I will build a secure python rest API with fastapi
Matheus
About this gig
Need a reliable back-end for your app, website or internal tool? I'll build a Python REST API with FastAPI that's secure, tested and easy to maintain.
What I can build:
- REST APIs with FastAPI and SQLAlchemy
- User login with email or Google sign-in, JWT and role-based permissions
- Database modeling with versioned migrations (Alembic)
- Integration with third-party APIs
- Automated tests with pytest and Docker setup
Proof of work: my main project is a live web platform with a FastAPI back-end, email or Google sign-in, Argon2id password hashing, role-based permissions and 580+ automated tests, deployed with Docker, HTTPS and daily backups.
You get: clean source code, automatic API docs (Swagger) and instructions to run it.
Send me a message about your project before ordering. I'll tell you honestly whether I'm the right fit.
Get to know Matheus
Matheus
Python Backend Developer, APIs and Automation
- FromBrazil
- Member sinceNov 2026
- Avg. response time1 hour
Languages
Portuguese, English
Hi! I'm Matheus, a Python developer focused on back-end, automation and data.
I build REST APIs (FastAPI) with login, permissions and databases, automate repetitive tasks, integrate third-party APIs, analyze spreadsheet and survey data with Excel reports, and fix bugs or add tests to existing Python projects.
My work includes a live web platform with 580+ automated tests and a survey analysis tool built for a psychologist (1,400 responses).
After almost 4 years working with clients as a designer, I value clear communication and realistic deadlines. Based in Brazil (UTC-3).
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FAQ
What do you need from me to start?
A short description of what the API should do, the main data it handles (users, products, orders...), who can access what, and any API or database you already use. If you don't have a spec, we can define it together before I start.
Can you deploy the API for me?
Yes, in the Premium package I set it up with Docker and help you deploy it to your server or cloud provider. In the other packages you get the code and instructions to run it.
