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Fiverr Pro
English
$
USD
I will develop a fastapi backend with database and data processing
Rodrigo Mendes
About this gig
I build production-ready FastAPI backends that are fast, reliable, and maintainable.
What you get:
RESTful API with FastAPI (one of the fastest Python frameworks)
Database design and integration (PostgreSQL, SQLite, or MySQL)
Data processing pipelines with Pandas
Type-safe models with Pydantic validation
Automatic API documentation
JWT authentication and authorization
Error handling with proper HTTP status codes
Database migrations with Alembic
Async/await support for high performance
Background tasks with Celery (Premium)
My approach:
I don't just write code that works I build systems designed for production. Every API includes proper validation, error handling, logging, and documentation. Your codebase will be clean, typed, and ready to scale.
Experience:
I've developed automated data pipelines and backend systems for infrastructure projects, handling multi-source data integration at scale. I understand database design, API architecture, and building systems that perform under load.
Tech stack:
FastAPI, SQLAlchemy, Alembic, Pydantic, PostgreSQL, Redis, Pandas, Pytest
Perfect for: SaaS backends, mobile app APIs, data-heavy applications, MVPs, and legacy system moder
Get to know Rodrigo Mendes
Rodrigo Mendes
Data Engineer and Python Automation Specialist
- FromPortugal
- Member sinceNov 2025
Languages
English, Portuguese, Spanish, French
I'm a Data Engineer and Python Automation Specialist building
production-grade solutions for real business problems.
What I do:
• ETL pipelines and data processing systems
• Web scraping with error handling and scheduling
• Backend automation and API integrations
• Database design and optimization
My experience includes developing 6 automated data pipelines
for municipal infrastructure, processing geospatial data at scale
from AWS S3. I write clean, maintainable code focused on solving
your specific needs efficiently.
WebSite: https://rodrigomendes-port.netlify.app
FAQ
What's included in the source code delivery?
You receive the complete FastAPI application with all dependencies listed (requirements.txt), database models, API routes, Pydantic schemas, and Alembic migrations. The code includes type hints, docstrings, and is ready to run locally or deploy to any platform.
What counts as 'one endpoint'?
One endpoint = one HTTP method + path combination (e.g., GET /users/{id}). CRUD operations on one resource typically need 4-5 endpoints (create, read, update, delete, list). I'll confirm the exact count during our initial discussion before starting.
Which databases do you support?
I work with PostgreSQL (recommended for production), MySQL, and SQLite (good for MVPs/testing). All packages include SQLAlchemy ORM with proper migrations via Alembic. Premium package can include Redis for caching.
Do you provide deployment assistance?
Basic and Standard packages include deployment documentation. Premium package includes hands-on deployment assistance to your chosen platform (AWS, DigitalOcean, Heroku, Railway, etc.) and basic DevOps setup.
Does the API include authentication?
All packages include JWT-based authentication. Standard+ includes role-based access control (RBAC). I implement industry-standard security practices: password hashing with bcrypt, secure token handling, and proper CORS configuration.
What if I need changes after delivery?
Each package includes revisions during development. After delivery, minor bug fixes within 14 days are free. Feature additions or significant changes are handled as new orders. I'm available for ongoing maintenance contracts.
Do you include tests?
Basic package includes manual testing and validation. Standard includes unit tests for business logic. Premium includes comprehensive test suite (unit + integration tests) with pytest, achieving 80%+ code coverage.
