this post was submitted on 29 Apr 2025
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For my bank the website works fast, but app does not. So an old backend is not always the issue.
Believe it or not but I’ve seen the mobile apps be required to use totally different abstraction layers than websites, usually due to different authentication and access management methods.
“Back-end” is often relative when talking about these old systems. There are sometimes multiple layers of abstraction with different business logic built into each layer.
It’s fixable of course, but it is costly to unwind 30-40 years of bad technical decisions made by business people who never understood the systems they were making decisions for.