What's Left? Dutch Salary-to-Reality Estimator

It's a web-app hosted on Streamlit, aiming to help expats moving to the Netherlands have a clearer vision of their income and expenses.

The app includes a list of job positions and their related salary equivalent (provided per seniority level), including specific calculation features such as the 30% ruling (if applicable), mandatory expenses, and charts to visualize how the expenses are distributed, and how the disposable income can vary over the years.
Users can also interact with the AI assistant called Harvey to ask more specific questions, for example, about taxation or the housing market.

How the app is built:
• Python – data processing and calculations (incl. libraries such as Pandas)
• SQL – structured data management and querying
• Plotly – interactive dashboards and visualization
• LangChain – LLM integration framework and RAG system
• Google Gemini 2.5 Flash API – chatbot reasoning and natural explanations
• Streamlit – app deployment and cloud