What's New?

December 2025

• Nested Comment Service

  New

  Low-Level Design · 10 Dec 2025

  Eoin

• Moving Average Without Top-K

  New

  Low-Level Design · 10 Dec 2025

  Eoin

• Number of Recent Calls

  New

  Low-Level Design · 10 Dec 2025

  Eoin

• Payment Wallet System

  New

  Low-Level Design · 10 Dec 2025

  Eoin

• Payment Ledger

  New

  Low-Level Design · 10 Dec 2025

  Eoin

• Prioritized Job Queue with Retries

  New

  Low-Level Design · 9 Dec 2025

  Eoin

• Predictive Battery Management System

  New

  Low-Level Design · 9 Dec 2025

  Eoin

• Print in Order

  New

  Low-Level Design · 9 Dec 2025

  Eoin

• Request Replaying / Idempotency

  New

  Low-Level Design · 9 Dec 2025

  Eoin

• Real-Time Event Ingestion and Statistics

  New

  Low-Level Design · 9 Dec 2025

  Eoin

• Server Load Balancer

  New

  Low-Level Design · 8 Dec 2025

  Eoin

• Self-Balancing BST

  New

  Low-Level Design · 8 Dec 2025

  Eoin

• Sales Tax Calculator

  New

  Low-Level Design · 8 Dec 2025

  Eoin

• Ring Buffer for Producer-Consumer

  New

  Low-Level Design · 8 Dec 2025

  Eoin

• Resource Loader

  New

  Low-Level Design · 8 Dec 2025

  Eoin

• Snapshot Set with Iterator

  New

  Low-Level Design · 5 Dec 2025

  Eoin

• Song Playlist

  New

  Low-Level Design · 5 Dec 2025

  Eoin

• Surge Pricing Validator

  New

  Low-Level Design · 5 Dec 2025

  Eoin

• Stock Price Tracker (Observer Pattern)

  New

  Low-Level Design · 5 Dec 2025

  Eoin

• Sparse Matrix Multiplication

  New

  Low-Level Design · 5 Dec 2025

  Eoin