Hi
Forget about Elixir (it’s just another programming language).
Forget about landing another job (it’s just another job, you won’t be happy).
Read everything and study 24/7, stay curious so you can create opportunities for yourself. Good luck!
As to the questions…
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The SQL vs NoSQL question makes absolutely no sense without context (traffic level, structure or structureless-ness of data, concurrency model, etc) and a proper architect would study the actual underlying problem closely before providing a solution.
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I’d probably use a bunch of processes and model each door and each carriage separately, as a starting point. Could model riders too.
