System design, AI engineering, databases, networking, concurrency and more, written for engineers building real trading and fintech systems — part of the Algomi Suite.
Back-to-school season at an online stationery shop: why on-hand stock isn't available stock, how atomic reservations stop two orders claiming the same calculator, and how shipments, cancellations and warehouse transfers stay honest.
Created 2026-09-16 · Updated 2026-10-15 · System Design
An inter-school blitz final between Chennai and Delhi tests everything: why the server must be the referee, why a board picture isn't the full state, and how one game stays correct through double taps, a ticking clock and a server failover.
Created 2026-09-16 · Updated 2026-10-15 · System Design
9:00 on a Friday, first-day-first-show bookings open for a superstar's film, and 100,000 fans want 400 seats. How a ticketing system holds seats for a few minutes, keeps payment uncertainty away from inventory, and stays fair when the crowd arrives.
Created 2026-09-26 · Updated 2026-10-15 · System Design
One busy restaurant kitchen explains race conditions, locks, deadlock, producer-consumer, thread pools, and thread-safe class design, with runnable Java 17 code and the Java-specific facts (memory model, volatile, ReentrantLock, ConcurrentHashMap, virtual threads) interviewers probe.
Created 2026-09-29 · Updated 2026-10-15 · System Design
