// Cause & Effect 🎙️
How companies ship with Effect
Engineering stories from OpenCode, OpenRouter, MasterClass, and more.
// Available on
// Episode #09
Foldkit: An Effect-First Frontend Framework
Devin Jameson joins Cause & Effect to talk about Foldkit, an Effect-first frontend framework inspired by Elm architecture. Devin and Johannes Schickling discuss why Foldkit takes a schema-first approach to frontend state, how it differs from React, how commands model side effects, and why this architecture may be especially useful in the age of AI-assisted coding.
// Episode #08
Effectifying OpenCode
Kit Langton joins the podcast to talk about Effect, OpenCode, and what it takes to migrate a large TypeScript codebase to Effect. Enjoy a very Kit episode, technical, funny, opinionated, and full of love for effect systems.
// Episode #07
Reliable Payroll Systems in TypeScript with Effect
In this episode we speak with Adam Rankin, CTO at Warp, about using Effect to bring structure and composability to a growing TypeScript codebase, enabling a small, fast-moving team to stay productive while shipping reliable payment & payroll systems.
// Episode #06
Inside OpenRouter's Tech Stack and Use of Effect
In this episode we speak with Louis Vichy, co-founder of OpenRouter, to discuss about OpenRouter's TypeScript stack, internal tooling powered by Effect, and the engineering challenges of scaling their AI platform.
// Episode #05
Event-Driven Systems in FinTech. How Spiko Leverages Effect
In this episode we speak with Samuel Briole, CTO of Spiko, a Paris-based FinTech startup building infrastructure for issuing regulated financial products on public blockchains, specifically risk-free products.
// Episode #04
From Skeptic to Advocate, Scaling Effect at Vercel
In this episode we speak with Dillon Mulroy, Domains Lead at Vercel, who shares his personal journey with Effect and how Vercel gradually adopted it across their Domains platform.
// Episode #03
Scaling Voice AI at MasterClass with Effect & TypeScript
In this episode we speak with David Golightly, Staff Engineer at MasterClass, to explore how his team built Cortex – a real-time voice AI orchestration layer that powers personalized conversations with celebrity instructors like Gordon Ramsay and Mark Cuban.
// Episode #02
Scaling AI for Customer Support at Markprompt with Effect
In this episode we speak with Michael Fester from Markprompt about scaling AI-powered customer support with Effect.
// Episode #01
Adopting Effect at Zendesk with Attila Večerek
In this episode we speak with Attila Večerek, Tech Lead and Staff Engineer at Zendesk, about their journey adopting Effect incrementally within a large-scale, diverse codebase environment.