While implementing real-time communication between the client and server, I discovered that the provided SDK lacked proper type definitions, and calling unsubscribe in one place stopped listeners from receiving updates in other parts of the application. To address this, I created a more type-safe abstraction and only triggers unsubscribe when the final listener has been removed.

When ordering packages from abroad, I often faced situations where the courier couldn’t reach me or I didn’t have enough cash on hand. I didn’t want to manually check the shipment status every day, and the official app provided only three vague statuses — with the last one always being “in transit.”

Using the public SOAP API provided by the Poland Post, I automated the entire shipment tracking process and added email notifications for status updates.

Frustrated by duplicate book orders and missing entries in platforms like Goodreads (especially for books in non-English languages), I am developing a personal library management system. This will allow me to track my entire collection, including multilingual titles, and efficiently manage my reading history.