The Data Stack Show - The PRQL: He’s Back! How typedef is Changing Data Workflows with Kostas Pardalis

Episode Date: August 27, 2025

In this bonus episode, Eric and John welcome back longtime co-host of the Data Stack Show Kostas Pardalis to talk through all things AI and his co-founding of typedef.The Data Stack Show is a weekly podcast powered by RudderStack, customer data infrastructure that enables you to deliver real-time customer event data everywhere it’s needed to power smarter decisions and better customer experiences. Each week, we’ll talk to data engineers, analysts, and data scientists about their experience around building and maintaining data infrastructure, delivering data and data products, and driving better outcomes across their businesses with data.RudderStack helps businesses make the most out of their customer data while ensuring data privacy and security. To learn more about RudderStack visit rudderstack.com.

Welcome to the Datastack Show prequel. This is a short bonus episode where we preview the upcoming show. You'll get to meet our guest and hear about the topics we're going to cover. If they're interesting to you, you can catch the full-length show when it drops on Wednesday. Welcome back to the Datastack show. We are here with an extremely special guest, Kastis Pardalis from TypeDev, formerly a co-host of the Datastack show, Kostas, welcome back as a guest. Happy to be back here, Eric.

It's always fun to be back at the Datastack show, which I have some great memories of, like, being the co-host here with you and working with Brooks. So I'm super happy to be here. Well, I know that longtime listeners are very familiar with you, but for the several million people that are new listeners since you left the show, give them just a brief background on yourself. Oh, are you saying you are not like, I'm not that popular yet. Like, so everyone already knows about me.

I thought they did. Oh, my goodness. Okay. All right. I'll do it, even if it's just a formality, but I'll say a few things about myself. So, yeah, I'm costless. I'll keep it brief because I'm sure, like, we'll talk more about that, like during the show. I've been building data infrastructure for, like, more than a decade now, especially, like,

startups. So I, what I really enjoyed like the intersection of business building and technology building. I do have like an engineering background. I can't escape that. But at the same time, I really enjoy like building products and companies. So naturally, I found something very technical to productize and commercialize and sell to like technical personas. I'm working on something new right now, and I'm looking forward to like to talk more about that and what is happening in the world in our industry today. Awesome. So KOSAS really excited to hear about what you're doing now. We'll definitely dig into some AI topics. And then I will save this for the show, but I want a response from you to some of the news the last couple weeks about return on

investment for AI. There's some stuff floating around where all these companies are saying, you know, they've invested X amount of money and not seen the return on AI. So we've got to talk about that topic. And what do you want to dig into? Oh, 100%. I think talking about what has happened so far with AI, where we are today and what's next. I think it's like very interesting. So definitely looking forward like to talking on that and like what's next. Because if anything, what we've seen so far is everything has been like extremely accelerated. Like things that like in other industries like probably take I don't know, like maybe years or even. like decades like to happen with AI right now in tech industry like things take like

literally weeks or months so what we are seeing is pretty normal natural and I think kind of gives us a hint of what is coming next to it's I think like super excited exciting awesome well let's dig in and chat let's do it all right that's a wrap for the prequel the full-length episode will drop Wednesday morning subscribe now so you don't miss it Thank you.