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Using OxCaml to implement type-safe reference counting between OCaml and Python

Jane Street is known for being an OCaml shop, but for years now Python has been our second major programming language, acting as the primary tool for data an...

15 Jun 2026

Jane Street Tech Blog

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OCaml JTRT

This time of the year is, just like Christmas time, a time for laughs and magic... although the magic we are talking about, in the OCaml community, is not exactly nice, nor beautiful. Let's say that we are somehow akin to many religions: we know magic does exist , but that it is satanic and shouldn'...

01 Apr 2018

OCamlPro

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