What are some common challenges faced by developers working on Flask REST API projects?

Developers working on Flask REST API projects often encounter challenges such as managing application scalability, ensuring robust authentication and authorization, and handling complex data serialization. Since Flask is lightweight and unopinionated, setting up a well-structured project architecture and integrating features like error handling, input validation, and automated testing requires careful planning. Collaboration with frontend teams or other backend services also demands clear API documentation and consistent versioning to avoid miscommunication and integration issues.