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Latest Interviews

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  1. Jane Street1h 20m

    Building Tools for Traders with Ian Henry

    Ian Henry, Ron Minsky, Mark Mandelbaum, Mark Mirchandani, David Eastman, Brian Dorsey

    Ian Henry, a Jane Street engineer who transitioned from general web development to options trading tools, leverages the firm's custom OCaml ecosystem to build high-density interfaces that eliminate mouse usage and manage complex volatility surfaces. His recent work includes creating Bauble, a live 3D graphics environment in the Janet language that demonstrates how side projects using image-based state serialization and novel macro systems can rapidly inform internal production tooling. Through this process, Henry illustrates how Jane Street bridges the gap between low-latency exchange architecture and expert user needs by prioritizing type safety, extreme information density, and a parallel software universe free from standard web protocols.

  2. Y Combinator49 min

    Gmail Creator Paul Buchheit On AGI, Open Source Models, Freedom

    Paul Buchheit, Jared, Harj, Diana, Noam Shazier, Mark Mandelbaum, Mark Blyth, Paul Lewisohn, Zuck Meyer, Melanie Warrick, Gary Illyes, Lyn Alden

    Paul Buchheit and Noam Shazier trace Google's evolution from an AI-first innovator to a risk-averse monopoly that stifled tools like Lambda to protect search revenue, while OpenAI emerged as a non-profit counter-movement funded by figures like Elon Musk to keep research open. Buchheit champions open-source models as essential for preserving individual liberty against Big Tech centralization and authoritarian surveillance, predicting that algorithmic efficiency will soon lower barriers for small teams to build AGI. He warns that regulatory overreach like SB 1047 will force excessive censorship and that the future workforce will face displacement by autonomous AI agents capable of deep-faking knowledge work by 2033.

  3. Jane Street1h 1m

    What is an Operating System? with Anil Madhavapeddy

    Anil Madhavapeddy, Ron Minsky, Mark Mandelbaum, Mark Blyther

    Mirage OS is a pure OCaml unikernel framework that compiles applications into minimal, single-purpose binaries by linking only essential drivers and protocol stacks directly to the kernel. Since its origins as a Cambridge research project to verify high-level language performance, the system has achieved significant industrial adoption, powering Docker for Mac and Windows, Tezos blockchain nodes, and energy-efficient solar sensor networks. By utilizing a library operating system model and advanced features like the LDRF memory model, Mirage delivers enhanced security through a reduced attack surface while enabling scalable multi-core execution in upcoming language releases.

  4. Y Combinator1h 1m

    Advice on Organizing and Running Growth Teams from Dan Hockenmaier and Gustaf Alströmer

    Dan Hockenmaier, Gustaf Alströmer, Craig Cannon, Toni, Michael Savage, Justin LaRosa, Mark Mandelbaum, Francesc Campoy, Dan Galpin, Dan Gallup

    Dan Hockenmeyer of Basis One and Gustav Alströmer of Y Combinator discuss a growth strategy centered on prioritizing a single high-leverage channel and achieving product-market fit before scaling paid acquisition. They argue that early-stage teams must rely on analytical generalists who can model the entire business equation, using retention graphs to test high-impact hypotheses rather than chasing superficial metric tweaks. The discussion highlights critical lessons from Airbnb and Thumbtack, emphasizing that sustainable expansion requires building growth functions in-house, treating referrals as paid marketing with strict ROI calculations, and avoiding structural distractions like premature VP hires or reliance on saturated ad platforms.