Content List

When building backend systems, the initial architecture is usually straightforward: * A request enters the system, the backend performs all required work, and then returns a...

Timezone Bugs in Production: Common Pitfalls and How to Avoid Them In the previous article, we built a basic mental model for handling timezones in global applications: That is a...

* When a system serves users within a single geographic region, time zones often do not appear to be a major concern. Developers, users, servers, and business operations may all...

When I first approached the problem of supporting multiple payment methods, I assumed it was mainly about splitting an amount across several sources. For example, suppose a service...

Once caching is introduced into a production system, a new question arises: > If data is already stored in the cache, how should applications read and write that data? At first...

* Have you ever fixed code in one place → only to trigger a chain of bugs somewhere else? * For example: you change the way data is stored, and suddenly all the logic in , , and...