Thoughts, notes, and explanations on Python, Data Structures, Algorithms, Machine Learning, and learning how to learn effectively.
This section will grow over time with structured posts and practical insights.
LLD Deep Dive #5: Designing Splitwise (Expense Sharing) What this document is. This is a complete, step by step walkthrough of how to design an expense sharing system of the kind popularised by the Splitwise application. It reasons from first principles, states the alternatives at every decision point, and justifies the option that is chosen. The design developed here is implemented as a small, runnable, modular Python project that accompanies this document, so that every concept discussed in prose can be examined and executed as real code. ...