#Backend

An intuitive guide to understanding the three core message delivery guarantees in distributed systems—At-most-once, At-least-once, and Exactly-once—with real-world payment examples.

Learn how to build a high-performance Directed Acyclic Graph (DAG) task execution engine in Java from scratch using cycle detection algorithms and CompletableFuture.

In the digital world, where traffic over the services is very high, engineers often face problems with handling concurrency in a system. Deadlock plays an important role in the discussions whenever devs talk about concurrency issues.

Understand how MySQL transactions work internally — from buffer pools and redo logs to MVCC and crash recovery.