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I will build a tested fastapi backend feature or rest API
Mary
About this gig
I will build a clearly scoped FastAPI feature or REST API for your web application, internal tool, or AI-powered product. Depending on the package, I can add endpoints, Pydantic validation, SQLAlchemy models, an Alembic migration, PostgreSQL or SQLite persistence, authentication and permissions, an external API integration, and automated pytest coverage.
You receive:
- readable Python source code;
- defined request and response schemas;
- validation and explicit error handling;
- Swagger/OpenAPI documentation;
- automated tests included in the selected package;
- setup and handoff instructions.
Please message me before ordering if your project has an existing codebase, deployment requirements, payment processing, or more than one external integration. I will review the scope and tell you honestly whether it fits.
Get to know Mary
Mary
Python Backend, Automation Developer
- FromRussia
- Member sinceJun 2025
- Avg. response time1 hour
Languages
English, Russian, Chinese
Hi, I'm Mary and I’m a Python backend developer focused on tested FastAPI APIs and reliable backend features. I work with databases, authentication and roles, Redis/RQ background jobs, file processing, and AI API integrations.
My projects include a support-ticket platform, an async transcription service, and a bilingual AI FAQ app. I deliver clean code with validation, error handling, automated tests, API documentation, and setup instructions.
GitHub: github.com/snikmas
My Portfolio
FAQ
Can you build an entire application?
This Gig covers one contained backend feature or module. A larger application should be divided into milestones and quoted separately.
Do you provide a frontend?
The primary delivery is backend code and API documentation. I can provide a minimal Streamlit or React demo only when agreed before ordering.
Can you work with an existing FastAPI repository?
Yes. Please share the repository structure, setup instructions, current tests, and the exact requested behavior before ordering.
Do you deploy to production?
Local Docker setup can be included. Cloud deployment, infrastructure ownership, domains, and production monitoring require a separate scope.
Do you build payment integrations?
Not through the standard packages. Payment and other security-sensitive integrations require prior review and explicit acceptance.
What counts as a revision?
A revision corrects the agreed behavior within the original requirements. A new endpoint, workflow, integration, or changed business rule is additional scope.
