Pennywise

Pennywise is a micro-investing platform designed to help users build long-term investing habits through automated round-up investments. The system tracks everyday transactions, rounds them up to the nearest dollar, and invests the spare change into diversified portfolios. The project focuses on building a secure, reliable financial application with clear separation between user experience, business logic, and infrastructure. Key areas of work include transaction processing, asynchronous background workflows for round-up execution, user settings management, and robust logging and observability for financial operations. Pennywise emphasizes correctness, transparency, and scalability, exploring how modern fintech systems handle sensitive data, financial workflows, and user trust. The project serves as a practical deep dive into backend system design, infrastructure reliability, and production-grade application architecture in a regulated domain.