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5 slides12:43EN
JSJane Street· Dec 20, 2024How OCaml Represents Values in MemoryA practical tour of immediate integers, heap blocks, runtime tags and variant constructors, illustrated with OCaml's Obj module.Software engineering
3 slides9:25EN
JSJane Street· Oct 1, 2024Richard Eisenberg: Using OCaml’s Coercion OperatorRichard Eisenberg · Jane StreetA practical tour of subtyping, polymorphic variants and private type abbreviations, with no runtime conversion cost.Programming LanguagesSoftware engineering
4 slides8:06EN
JSJane Street· Aug 7, 2024How OCaml's Proposed Include Functor Syntax Reduces RepetitionA reverse-array example shows how to derive common module functions from a minimal implementation without an extra wrapper module.Programming LanguagesSoftware engineering
5 slides14:36EN
JSJane Street· Jun 24, 2024Programming with OCaml's Local ModeAn example shows how a local list can contain global values, why a non-escaping annotation alone does not ensure stack allocation, and where the experimental feature remains awkward.Software engineering
5 slides11:28EN
JSJane Street· Jun 13, 2024OCaml Local Types: Regional Parameters and Loop RegionsA demonstration explains why some local parameters can cross a function boundary and how loop regions reclaim allocations.Programming LanguagesSoftware engineering
4 slides9:14EN
JSJane Street· May 29, 2024OCaml Local Function Types: Why Partial Application Can EscapeRichard Eisenberg · Jane StreetRichard Eisenberg uses a list-append example to show how a local argument changes the mode of a partially applied function in Jane Street’s OCaml compiler branch.Programming LanguagesSoftware engineering
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JSJane Street· Mar 13, 2024Richard Eisenberg on Jane Street's OCaml ExperimentsRichard Eisenberg · Jane StreetJane Street's compiler team is exploring unboxed types, locality modes, and data-race-free parallelism to make OCaml's performance and memory management better suited to its needs.Programming LanguagesSoftware engineering
3 slides11:07EN
JSJane Street· Feb 29, 2024How OCaml Locals Use a Separate StackA list example shows how region-scoped local values can avoid repeated garbage-collected allocations.Programming LanguagesSoftware engineering
7 slides12:52EN
JSJane Street· Jan 23, 2024OCaml Local Variables, Return Values and RegionsA worked example shows how `local_` and `exclave_` let a function accept a local value and return a local structure in its caller's region.Programming LanguagesSoftware engineering
4 slides8:52EN
JSJane Street· Jan 5, 2024Introducing Local Parameters in OCamlA demonstration of how Jane Street's experimental local mode restricts escaping values and makes function interfaces easier to reason about.Programming LanguagesSoftware engineering
2:21EN
JSJane Street· Jun 30, 2023Varun on Software Engineering at Jane StreetVarun · Jane StreetA London-based developer describes useful technical foundations, OCaml training and team matching at Jane Street.Software engineeringCareersCompany Culture
5:49EN
JSJane Street· May 23, 2023Ian on Software Engineering at Jane StreetIan · Jane StreetA London desk developer explains code review, OCaml training, intern projects and the feedback that comes from sitting near users.Software engineeringCode review & verificationDeveloper productivity+1
3:48EN
JSJane Street· May 10, 2023Val on Software Engineering and Collaboration at Jane StreetVal · Jane StreetA London developer explains how colleagues teach new hires, review production code, and work across teams.Software engineeringCompany CultureCareers+1
3:30EN
JSJane Street· Mar 15, 2023Brittany on Software Engineering and Internships at Jane StreetBrittany · Jane StreetAn equities desk engineer explains how interns learn finance and OCaml, contribute meaningful projects and collaborate with traders.Software engineeringCareersOnboarding+1
3:09EN
JSJane Street· Mar 15, 2023Minjie on Cybersecurity Engineering at Jane StreetMinjie · Jane StreetA Hong Kong software engineer describes learning OCaml, working on an internal permissions system and collaborating across teams on security alerts.CybersecuritySoftware engineeringCompany Culture
4:11EN
JSJane Street· Nov 8, 2022Inside Production Engineering at Jane StreetMark, Liora, Joseph · Jane StreetThree engineers describe the balance between resolving live issues and building software that makes support more effective.Observability & reliabilitySoftware engineeringCareers