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Notes

What you only learn
after it ships

What goes here is the detail you only learn after something has been built and run in production: the places the spec left vague, the calls we got wrong, and the failures that never occur in a test environment and only ever happen in a live one.

Every note comes out of a project we actually delivered. Client names and commercial data are never included.

All Notes / 01

  1. 012026-07-31

    ECPay and PayUni: what actually differs when you integrate

    We have shipped both. Not a feature comparison: how the encryption is actually assembled, how you get a sandbox, which response must never be treated as a failed payment, and one call we got wrong that cost us a server we did not need.

    Read this · 15 min
    Payments · ECPay · PayUni · E-commerce

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