I spent the last few months building an ISO 20022 parser in Elixir after dealing with banking integrations professionally and repeatedly running into the same problems:
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gigantic XML schemas
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painful tooling
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inconsistent message variants
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weak library support outside Java ecosystems
Ended up exporting some of that work and cleaning it up to start a full elixir library as a good excuse to learn more about elixir. Would be interested in what people think and if anyone else (god forbid) has use for this