The Haskell Interlude

Hosted by Haskell Podcast

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Latest episode

Oct 2026

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EN-US

About the show

This is the Haskell Interlude, where the five co-hosts (Wouter Swierstra, Andres Löh, Alejandro Serrano, Niki Vazou, and Joachim Breitner) chat with Haskell guests!

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60 recent

October 2, 2026Episode 871 hr 2 min

87: Edward Kmett

For the new Haskell Interlude, we sat down with Edward Kmett. Ed is the Founder and Chief Scientist of Positron AI. More importantly, he's a legend in the Haskell community for authoring many, many popular Haskell packages, first and foremost lens - and generally turning up the abstraction level to 11. We talk about design principles for Haskell libraries, category theory, cache-oblivious algorithms and his current work involving Haskell, C++, and FPGAs. Ed talks fast, so strap in!

September 11, 2026Episode 8653 min

86: Michael Hanus

In this episode, we sat down with Michael Hanus. Michael is a professor at the University of Kiel and is one of the founders of functional logic programming, the combination of logic and functional programming in a single formalism. Michael is also the creator of Curry, a functional-logic language that resembles Haskell, so you can dive right in if you're familiar with Haskell. Naturally, we talked about what functional logic programming is, how it improves over plain functional programming, and the challenges of semantics and implementation. We learned a lot - enjoy! Episode links and transcript

August 26, 2026Episode 8559 min

85: Brent Yorgey

In today’s episode, we’re joined by Brent Yorgey, Associate Professor of Computer Science at Hendrix College and the creator, among other things, of the Diagrams vector graphics library and Swarm, a 2D programming and resource gathering game. We talk about teaching, domain specific languages, and competitive coding. Episode links and transcript

June 29, 2026Episode 8451 min

84: Sylvain Henry

In this episode of the Haskell Interlude, we are joined by Sylvain Henry, one of the all-time top contributors to GHC. He tells us about his work on GHC, the bignum library, modularization, and the secret to becoming a top contributor!

June 14, 2026Episode 8344 min

83: POPL 2026 - Part 2

This is the first part of a miniseries on this year’s Symposium on Principles of Programming Languages, a.k.a. POPL 2026, hosted by Jessica Foster. In this episode we talk about: symbolic execution monads, what a lazy linear core in Haskell might have in common with Rust, hyperfunctions, the hallway track, and how to deal with rejection.

May 19, 2026Episode 8248 min

82: Fraser Tweedale

We talked to Fraser Tweedale. Fraser works at Red Hat, and is on the Haskell Security Response Team. We talked about security in the context of Haskell, both technical and organizational issues, and also the political issues involved. Fraser's work is both really important and not well-known in the Haskell ecosystem, so it was high time for him to come on the show.

April 27, 2026Episode 811 hr 10 min

81: Torsten Grust

Mike and Andres sat down with Torsten Grust, who is a professor of DB systems at the University of Tübingen. Even though Torsten loves SQL, he's used functional programming and Haskell to inform his work on query language design and compilation. We talked about the best way to program databases, how to bridge the gap between regular programming languages and databases, and compiling just about everything to SQL.

April 13, 2026Episode 8042 min

80: POPL 2026 - Part 1

This is the first part of a miniseries on this year’s Symposium on Principles of Programming Languages, a.k.a. POPL 2026, hosted by Jessica Foster. In this episode, we talk about: undergrad funding and participation, the behind the scenes of AV, choreographic programming, quantum languages, conference catering, and the joy of theory. And at one point, you’ll even hear us get kicked out the venue mid interview. Enjoy!

March 22, 2026Episode 791 hr 6 min

79: Peter Thiemann

Peter is a professor at the University of Freiburg, and he was doing functional programming right when Haskell got started. So naturally we asked him about the early days of Haskell, and how from the start Peter pushed the envelope on what you could do with the type system and specifically with the type classes, from early web programming to program generation to session types. Come with us on a trip down memory lane!

March 8, 2026Episode 7843 min

78: Jamie Willis

In this episode, we focus on a particular part of Haskell: teaching it. To help us, we are joined by Jamie Willis who is a Teaching Fellow at Imperial College London. The episode explores the benefits of live coding, and why Haskell is the best language for teaching programming.