The Currency Converter API is an advanced Python project that solves a real-world problem using Rate limiting and FastAPI application, orchestrated with JWT / OAuth2. It is architected as a modular system where data handling, processing logic, and presentation layers stay cleanly separated, so each part can be developed, tested, and reused independently. The result is a production-grade application that is easy to explain, extend, and present as a final year capstone.
Most existing approaches to this problem rely on manual effort or fragile scripts that are slow, hard to maintain, and unable to scale with growing data. Without an automated, well-structured solution built on FastAPI application, organizations and students alike struggle to get consistent, reliable results, and there is no easy way to monitor, audit, or improve the process over time.
This project builds an automated, modular system that ingests inputs through Rate limiting, processes them with JWT / OAuth2, and exposes results through CRUD endpoints. The design emphasizes maintainability, testability, and reusability, so the same architecture can be adapted to related problems with minimal changes. It delivers consistent results, keeps a clear audit trail, and drastically reduces the manual effort involved.
JWT / OAuth2
pytest + httpx
Object-oriented Python architecture
Typing, logging, and error handling
Config-driven settings
Unit tests with pytest
Python 3.11+
FastAPI
Pydantic validation
Modular pipeline built around Rate limiting and FastAPI application
Configurable thresholds and parameters via settings files
Comprehensive logging and error handling
Well-documented public interface for reuse
Automated tests covering critical paths
Clean separation of data, logic, and presentation
The system follows a layered architecture. The data layer handles acquisition and cleaning through Rate limiting; the logic layer implements the core processing with JWT / OAuth2 and FastAPI application; and the presentation layer exposes results through CRUD endpoints. A shared configuration module and a logging module support all layers, while the whole system is wrapped with automated tests. This separation makes the project easy to debug, benchmark, and extend.
Set up the Python virtual environment, project structure, and configuration files.
Build the data layer: implement acquisition and cleaning for Rate limiting.
Implement the core logic using JWT / OAuth2 and integrate FastAPI application.
Add the presentation layer via CRUD endpoints and wire up end-to-end flows.
Write automated tests and validate behaviour on real input data.
Optimize performance, add logging, and refine error handling.
Package the project, write documentation, and prepare the demo and viva report.
Architect maintainable, production-grade Python applications
Master data pipelines and integration with JWT / OAuth2
Gain hands-on experience with Schema validation with Pydantic and Async database operations
Write clean, tested, and documented code
Present and defend a complete software project in viva
Expose the system as a REST API for third-party integration
Add a web dashboard with real-time charts and monitoring
Containerize with Docker and deploy to the cloud
Integrate scheduling and notifications for fully automated operation
The Currency Converter API is a complete, advanced Python project that demonstrates professional software engineering — from architecture and data pipelines to testing and documentation. It is practical, scalable, and easy to present, making it an excellent choice for a final year Python project that stands out.
