Cause & Effect

Reliable Payroll Systems in TypeScript with Effect

Tue, 16 Dec 2025 12:00:00 GMT

Episode Notes

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 for building robust, production-grade applications in TypeScript.

Song: Dosi & Aisake - Cruising [NCS Release]
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(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

Inside OpenRouter’s Tech Stack and Use of Effect

Tue, 11 Nov 2025 12:00:00 GMT

Episode Notes

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 for building robust, production-grade applications in TypeScript.

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

Event-Driven Systems in FinTech. How Spiko Leverages Effect

Mon, 15 Sep 2025 10:00:00 GMT

Episode Notes

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:

Effect is an ecosystem of tools for building robust, production-grade applications in TypeScript.

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 & why Spiko chose Effect
(07:22) - Hiring engineers without Effect experience
(10:06) - Spiko’s Architecture & Apps
(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

From Skeptic to Advocate, Scaling Effect at Vercel

Mon, 04 Aug 2025 10:21:30 GMT

Episode Notes

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.

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

Scaling Voice AI at MasterClass with Effect & TypeScript

Tue, 24 Jun 2025 10:15:00 GMT

Episode Notes

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.

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

Scaling AI for Customer Support at Markprompt with Effect

Fri, 07 Mar 2025 12:30:00 GMT

Episode Notes

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.

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

Adopting Effect at Zendesk with Attila Večerek

Tue, 26 Nov 2024 16:16:16 GMT

Episode Notes

In this episode, Attila Večerek, Tech Lead & Staff Engineer at Zendesk, 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.

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