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3:13ENHow Jane Street’s Strategy and Product Team Works Across the FirmTeam members describe rotations, cross-functional projects and the skills they use to tackle ambiguous problems.
12:43ENHow OCaml Represents Values in MemoryA practical tour of immediate integers, heap blocks, runtime tags and variant constructors, illustrated with OCaml's Obj module.
2:50ENInside Jane Street’s 2024 Internship ProgramInterns and staff describe an 11-week program built around learning, collaboration and hands-on projects across several disciplines.
9:25ENRichard Eisenberg: Using OCaml’s Coercion OperatorRichard Eisenberg · Jane StreetA practical tour of subtyping, polymorphic variants and private type abbreviations, with no runtime conversion cost.
8:06ENHow 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.
3:18ENRory on Production Engineering and Incident Support at Jane StreetRory · Jane StreetA production engineer describes monitoring order engines, responding to outages and building a supportive team.
3:16ENJP on Machine Learning and Trading at Jane StreetJP · Jane StreetA Hong Kong equities trader describes his changing workday, the growth of research infrastructure, and the distinctive challenges of machine learning in finance.
2:46ENMatt on Machine Learning and Trading at Jane StreetMatt · Jane StreetA Hong Kong equities trader describes the challenges of financial data, the firm’s ML roles and its collaborative culture.
14:36ENProgramming 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.
11:28ENOCaml Local Types: Regional Parameters and Loop RegionsA demonstration explains why some local parameters can cross a function boundary and how loop regions reclaim allocations.
3:11ENAlok on Quantitative Research at Jane StreetAlok · Jane StreetA researcher describes projects, useful mathematical background and how candidates can prepare for interviews.
9:14ENOCaml 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.
3:30ENRichard 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.
11:07ENHow OCaml Locals Use a Separate StackA list example shows how region-scoped local values can avoid repeated garbage-collected allocations.
12:52ENOCaml 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.
8:52ENIntroducing Local Parameters in OCamlA demonstration of how Jane Street's experimental local mode restricts escaping values and makes function interfaces easier to reason about.
2:20ENSean on Hospitality and Office Life at Jane StreetSean · Jane StreetA member of Jane Street's London hospitality team describes fresh food, teamwork and the office events that bring colleagues together.
2:09ENDan on Trading Desk Operations at Jane StreetDan · Jane StreetA London trading desk operations team member explains the variety of the role, what interviews seek, and why asking questions matters.
2:21ENVarun on Software Engineering at Jane StreetVarun · Jane StreetA London-based developer describes useful technical foundations, OCaml training and team matching at Jane Street.
2:48ENKristen Answers Questions About Applying to Jane StreetKristen · Jane StreetA recruiter discusses application timing, campus roles, interview preparation and when to consider reapplying.
5:29ENJason on Operations and Learning at Jane StreetJason · Jane StreetAn ETF operations manager describes the team’s responsibilities, how it handles mistakes and why new colleagues should ask why.
3:26ENJorge on Hospitality and Making the Office Work at Jane StreetJorge · Jane StreetA New York hospitality team member describes preparing spaces, responding to daily needs and turning staff ideas into services.
3:23ENNitya on Training and Working as a Quantitative Trader at Jane StreetNitya · Jane StreetA trader on the New York international ETF desk describes the skills, training and collaboration involved in her work.
5:49ENIan 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.
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