I need a developer to build a simple SaaS web application. Users should be able to create an account, upload CSV or Excel files, and view processed results in a clean dashboard. The system should apply predefined logic to the uploaded data and allow users to download the results. The app should include user authentication, secure data storage, and basic analytics display. It should be easy to use, scalable, and built with common web technologies such as Python, Streamlit or FastAPI, and a simple database like PostgreSQL or Supabase. This is an MVP, not a complex platform. The focus is on clean functionality, reliability, and future scalability.