Cause & Effect

Effectful Technologies Inc.

Explore how software engineers use Effect to build reliable, production-ready software in TypeScript.

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10 episodes
Avg 1 hr 13 min
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#10
August 7 · 1 hr 29 min
Software Engineering in the Age of AI #10
Get support from the Effect community John A. De Goes joins Johannes Schickling and Michael Arnaldi to discuss how AI is reshaping software engineering, what developers should still learn, and why Effect’s primitives are especially valuable for coding agents. John is the creator of ZIO, as well as CEO of Ziverge and Golem Cloud. Learn more about and follow John: X // Linkedin Mentioned in the episode: Ziverge x Effectful Partership Effect TS Workshop The Primitive is the product blog post. Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #Ziverge #ZIO #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (00:00) - Intro, From ZIO to Effect (06:54) - Software engineering in the age of AI (12:34) - More developers, but a wider skill gap (23:03) - What is still worth learning? (29:40) - Closing the loop around coding agents (39:10) - Preventing engineering skills from atrophying (47:20) - Effect through the eyes of ZIO’s creator (52:42) - Why Effect’s primitives matter more with AI (58:05) - Teaching coding agents to write good Effect code (01:01:25) - Rethinking tests, DRY, and boilerplate (01:08:45) - The Effect Companion (01:18:16) - A role-playing game for learning Effect (01:25:05) - Turning knowledge into a product
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#9
July 20 · 1 hr 19 min
Foldkit: An Effect-First Frontend Framework #9
Get support from the Effect community 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. Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #Foldkit #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (00:00) - Intro (03:24) - Why build a new frontend framework instead of using React? (08:38) - Elm architecture, model-view-update, and frontend state (19:14) - Schema-first frontend development with Effect (22:37) - Foldkit vs React: components, architecture, and AI-readiness (33:09) - Demo: building a Pixel Art app with Foldkit (01:12:28) - Foldkit’s future: V1, testing, UI, MCP, and the Effect ecosystem
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#8
June 19 · 1 hr 45 min
Effectifying OpenCode #8
Get support from the Effect community 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. Follow Kit: - X - YouTube - GitHub Mentioned in the video: - effect.solutions - effect.institute - hex.kitlangton.com Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #OpenCode #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (00:00) - Episode highlight: why effect systems matter (00:43) - Meet Kit Langton (03:49) - Effect Institute, Visual Effect, and interactive learning (13:15) - Bringing Effect into OpenCode (19:18) - Schema, branded IDs, and safer types (27:35) - Effect services, layers, and architecture (32:28) - Testing LLM workflows with Effect (46:24) - Incremental adoption in a real TypeScript codebase (50:44) - effect.solutions and agent-ready patterns (01:00:36) - Layers, dependencies, observability, and telemetry (01:16:58) - AI-first coding workflows (01:34:35) - Using Effect v4 in OpenCode (01:36:56) - What’s next for OpenCode (01:42:33) - Closing thoughts
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#7
Dec 16, 2025 · 59 min
Reliable Payroll Systems in TypeScript with Effect #7
Get support from the Effect community In this episode, Johannes Schickling talks 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. Jobs at Warp. Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #Warp #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (00:00) - Intro (01:45) - Adam’s background & early startup experience (08:18) - Warp's origin story (17:36) - What made Effect click for Warp (29:24) - Getting started with Effect (AI browser agent) (34:52) - Onboarding developers to Effect (42:17) - Benefits of composability in payment systems (43:53) - Warp’s system architecture (56:48) - Closing thoughts
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#6
Nov 11, 2025 · 1 hr 26 min
Inside OpenRouter’s Tech Stack and Use of Effect #6
Get support from the Effect community Louis Vichy, co-founder of OpenRouter, joins Johannes Schickling and Michael Arnaldi to talk about OpenRouter’s TypeScript stack, internal tooling powered by Effect, and the engineering challenges of scaling an AI platform processing trillions of tokens weekly. Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #Spiko #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (00:00) - Guest Intro & OpenRouter (07:45) - Why Everything Runs in TypeScript (15:43) - Scaling & Routing in OpenRouter’s Infrastructure (18:03) - Michael’s Story: Why Effect Was Born (23:11) - Effect vs. Result Types and Error Handling (26:04) - Culture, Hiring & Engineering Consistency (30:48) - The Case for Gradual Effect Adoption (32:30) - Generators, Pipe, and Functional Design (47:41) - Observability & Concurrency (58:35) - Agentic Systems, Orchestration & Observability (01:16:41) - Using Effect in OpenRouter’s Internal Tooling
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#5
Sep 15, 2025 · 58 min
Event-Driven Systems in FinTech: How Spiko Leverages Effect #5
Get support from the Effect community This podcast episode features Samuel Briole, CTO of Spiko, a Paris-based FinTech startup building infrastructure for issuing regulated financial products on public blockchains, specifically risk-free products. Spiko utilizes the Effect extensively from day one, for both backend and frontend development, particularly for managing asynchronous operations, API integrations, and smart contracts. Learn more about & follow Samuel: LinkedIn GitHub effect-messaging Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #Spiko #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (15:12) - Event-Driven Systems (22:45) - Choosing RabbitMQ over Kafka or NATS (28:26) - Why they built effect-messaging (39:53) - Effect Schema, Versioning, Async Messaging (46:44) - Agents & Effect AI (53:21) - Closing Thoughts & Looking Ahead
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#4
Aug 4, 2025 · 53 min
From Skeptic to Advocate: Scaling Effect at Vercel #4
In this episode of Cause & Effect, Johannes Schickling is joined by Dillon Mulroy, Domains Lead at Vercel, who shares his personal journey with Effect and how Vercel gradually adopted it across their Domains platform. Dillon explains why Effect feels like having superpowers for error handling, observability, testing, and more. Whether you're skeptical or already experimenting with Effect, this conversation offers clarity, nuance, and inspiration. Enjoy! Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #Vercel #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (00:00) - Intro (03:00) - How Vercel Adopted Effect (10:57) - Dillon’s background (16:27) - Effect DX (22:13) - Lessons from other stacks (25:18) - From Skeptic to Advocate (31:13) - Effect's Incremental Adoption (42:31) - Effect ≠ RxJS, Effect vs Ramda (48:24) - Effect's superpowers at Vercel (52:31) - Wrap-Up & What’s Next
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#3
Jun 24, 2025 · 1 hr 9 min
Scaling Voice AI at MasterClass with Effect & TypeScript #3
In this episode of Cause & Effect, Johannes Schickling had a conversation 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. Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #Zendesk #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (00:00) - Intro & David's background (04:56) - Discovering Effect & early impressions (08:32) - Why RxJS wasn’t enough for Cortex (16:15) - MasterClass On Call (19:10) - Building the orchestration layer (25:30) - Incremental adoption of Effect at MasterClass (31:43) - Text-to-speech component (40:08) - Error handling, observability, open-telemetry (01:01:20) - Looking ahead: Effect 4.0 & the future (01:08:00) - Closing thoughts
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#2
Mar 7, 2025 · 52 min
Scaling AI for Customer Support at Markprompt with Effect #2
Join us as we talk with Michael Fester from Markprompt about scaling AI-powered customer support with Effect, building reliable and high-performance infrastructure, and enhancing developer productivity in a fast-evolving AI landscape. Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #Zendesk #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (00:00) - - Welcome & guest introduction (01:54) - - Michael's journey: from academia to AI & Customer Support (03:49) - - What is Markprompt? Overview & use cases (07:45) - - Markprompt's system architecture (10:22) - - Challenges of running AI-powered support systems (13:20) - - Improving reliability with Effect (16:41) - - Technical architecture breakdown (19:51) - - The public API server setup (23:50) - - Ingestion engine (26:29) - - Onboarding engineers to Effect (30:51) - - Migrating the codebase to Effect (35:19) - - Effect in production: the power of schema (39:02) - - Migrating to Effect: challenges & key takeaways (41:45) - - Effect brings out the best in us engineers (45:34) - - The Future of AI infrastructure (50:18) - - Closing remarks & thanks
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#1
Nov 26, 2024 · 1 hr 20 min
Adopting Effect at Zendesk with Attila Večerek #1
In this episode, Attila Večerek, Tech Lead & Staff Engineer, joins our host Johannes Schickling to discuss how Zendesk incrementally adopted Effect in a polyglot environment with a large codebase. Effect is an ecosystem of tools to build production-grade software in TypeScript. Website & docs Community & support Follow us on X (Twitter) Github #Effect #TypeScript #Zendesk #softwareDevelopment Song: Dosi & Aisake - Cruising [NCS Release] Music provided by NoCopyrightSounds Free Download/Stream: http://ncs.io/Cruising Watch: http://ncs.lnk.to/CruisingAT/youtube (00:00) - Intro (03:13) - Being an engineer at Zendesk (06:05) - Challenging the status quo (13:10) - Introducing TypeScript at Zendesk (20:22) - Adopting fp-ts (25:19) - The transition from fp-ts to Effect (31:00) - DX adopting Effect (37:15) - Implementing a Kafka consumer with Effect (42:18) - Dependency injection (48:33) - The power of TypeScript & Effect (53:03) - Onboarding developers to Effect at Zendesk (01:15:37) - Excitement for Effect Cluster (01:19:30) - Outro
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