Facundo Dominguez is interviewed by Niki Vazou and Joachim Breitner. Facundo Dominguez tells us the difference between STM and SMT. We also talk about Liquid Haskell and its relation to dependent types and the `QualifiedDo` extension -- which is one of the most highly discussed GHC proposals -- and the general GHC proposals. And, finally, Facundo lets have Haskell peacefully coexist with other languages thanks to his work in the build system Bazel.

Ryan Trinkle is interviewed by Joachim Breitner and Niki Vazou. Ryan Trinkle has co-founded Obsidian Systems, a company that not just uses Haskell but even more exotic tech that as Functional Reactive Programming (FRP) and Nix. Ryan shed some light on the business side of Haskell and we get to hear that hiring for Haskell is actually excellent.

David Christiansen is interviewed by Alejandro Serrano  and Wouter Swierstra.  They talk about many functional programming things, from Idris to Racket and of course Haskell and David's new role as the executive director of Haskell Foundation. 

Gergő Érdi is interviewed by Wouter Swierstra and  Andres Löh. Gergő has an interesting path into Haskell taking many twists and turns. This episode discusses about these twists and Gergő's recent book on implementing retro computers using Haskell.

Simon Peyton Jones is interviewed by Andres Löh and Joachim Breitner.  Simon is the creator of Haskell and in this episode he talks about his new position at Epic, the origins of Haskell and why "it feels right", and the (extra)ordinary Haskell programmers.

Nadia Polikarpova is interviewed by Alejandro Serrano and Niki Vazou. Nadia is an assistant professor at UCSD, where she works on improving how we write programs. They talk about some of her projects, like Hoogle+ and Synquid, and how she approaches teaching about these topics.

Sebastian Graf is interviewed by Joachim Breitner and Alejandro Serrano.  Sebastian is one of the most active contributors to GHC, and tells of this experience, from his very first commit to GHC to his current work on the pattern coverage checker and demand analyzer. He also gives us hints on how to reason about the strictness of Haskell programs.

Niki Vazou and Andres Löh are joined by guest Théophile Choutri (they/them), who also goes by Hécate. Théophile coordinates multiple projects and volunteer groups within the Haskell Foundation, notably the Haskell School project (intending to provide a free online open source library for teaching Haskell), and works on improving GHC core documentation and developing an alternative to Hackage. Together they discuss Théophile's introduction to Haskell and their ongoing projects with the Foundation and the broader community, with a focus on the challenges facing Haskell non-experts and how they hope to tackle them.

José Calderón  is interviewed by Niki Vazou and Wouter Swierstra .  José has been working on functional programming at Galois and University of Maryland.  He tells us about his research background in many different continents, his experience with teaching compilers, the relation between music and functional programming and the "Recursive Programming Techniques" book that in the  1970s captured the essence of functional programming. 

Graham Hutton is interviewed by Wouter Swierstra and Andres Löh. Graham is known for his work on Haskell both in research and teaching Haskell, and in particular his Haskell book. Graham will tell us a little bit about how his book came about and give us advice for how to write a book ourselves, but also look back on his experience using Haskell and teaching Haskell in the last thirty years, and tell us a little bit about how bad the compile times were for the very first versions of GHC.