Context
RendeCerto was created to help users evaluate investment scenarios with practical and understandable outputs.
Problem
Financial calculations can become inconsistent when handling multiple scenarios and edge cases, reducing trust in the product.
Role & Ownership
I implemented core simulation logic and frontend behavior, focusing on calculation consistency and user-facing clarity.
Technical Decisions
- Built the app with Next.js and TypeScript.
- Implemented complex calculation rules with test coverage for key scenarios.
- Structured outputs for readable simulation comparisons and interpretation.
- Prioritized deterministic behavior across repeated calculations.
Outcome
- The app delivered stable financial simulations across different usage contexts.
- Users received clearer outputs for scenario-based decision support.
Notes / Lessons
In fintech experiences, trust comes from both numerical reliability and transparent presentation of results.