Real-World Engineering Notes - Posts List - Nguyễn Hoàng Lâm's Blog

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Multiple payment methods: the hardest part is not splitting the amount, but rolling it back

Programming & engineeringPayment

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...

Real-world engineering notes07/23/202616 min read80

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Managing time zones in global applications: utc, local time, and business context

Programming & engineeringTime ZoneUTC+1

* 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...

Real-world engineering notes08/13/202615 min read160

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Common time zone bugs in production: dst, scheduling, reporting, and hidden assumptions

Programming & engineeringTime Zone

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...

Real-world engineering notes08/13/202620 min read60