I'm looking for a developer to create a web app for a financial calculator. The primary function of this calculator will be investment return calculations. Key Functions: - Investment return calculations - Include: - Compound interest - Simple interest - ROI (Return on Investment) Ideal Skills and Experience: - Proficiency in web app development - Strong background in financial modeling - Experience with user-friendly UI/UX design - Knowledge of secure data handling and calculations Please provide examples of similar work done.