Sorry have to ask these days. Is this carefully written down information from years of experience in the field or AI slop?

Appears that the author got some help organizing the document, but wrote it all themselves.

Hey, author here :)

Its at least 80% organic artisanal writing and maybe 20% AI when I needed help with grammar, completeness, broader perspective and everything around.

It may be a good idea to start the book with a really short "About the author" to state exactly this and your work experience. Otherwise looks well written to me, good job! :)

Native English speaker. I scanned it and IMO there's a slight overuse/misuse of hyphens. Maybe the AI tool could be asked to identify and correct? (The hyphens might be triggering people to think it's AI, too).

They mostly need replacing with a full stop or a colon.

E.g.

"In practice this means storing the amount as an integer in its smallest unit - €12.34 becomes 1234"

->

"In practice, this means storing the amount as an integer in its smallest unit: €12.34 becomes 1234."

or

"In practice, this means storing the amount as an integer in its smallest unit (e.g., €12.34 becomes 1234)"

Hyphens here are meant to be formatting. You would be correct if this was a literary piece, but handbooks and sheets don't need to use these rules.

Whilst I wouldn't say anything in it requires years of experience to know, this would be helpful for someone who hasn't considered anything about monetary systems. It doesn't read like slop, but I could be wrong but even so it all seems fairly reasonable (I've only fully read about 50% before realising there's nothing new here for me, and then skimmed to rest).

Skimmed it and based on my experience in fintech, it looks good, accurately represents the real world. I guess there’s still a chance it is AI generated but it doesn’t seem like vacuous slop, it has substance!

from the author's mastodon post [0]

    I just published Fintech Engineering Handbook distilled from 6 years of tears, sweat and swears. 
    It’s a free ~25-page resource with various hints and patterns around handling money. 
    Tell me what you think!
other than that, peruse the commits on the source [1], or wait for the author to respond.

[0]: https://mas.to/@krever/116814803588993437

[1]: https://github.com/Krever/fintech-engineering-handbook/commi...