Effect for Domains at Vercel | Dillon Mulroy (Effect Days 2025)

Get support from the Effect community →   / discord   Dillon Mulroy discusses Effect's type-driven approach, structured concurrency, and best practices for building scalable, reliable systems in TypeScript. 00:00 Opening thanks & acknowledgments 00:48 A year ago: not yet using Effect 01:30 Intro & background 02:06 Agenda overview 02:30 The problem with TypeScript: Happy Path Blindness 05:29 TypeScript’s catch and error typing limitations 06:16 Function coloring 07:46 Fragmented ecosystem challenges 08:41 Qualities of production software 11:46 Why my team at Vercel is betting on Effect 13:00 Error typing and composability with Effect 13:52 Dependency injection in Effect 14:45 Observability & OpenTelemetry 15:23 Ecosystem harmony 16:04 Timeline of adoption inside Vercel 17:11 Self-serve domain renewals (case study) 21:02 Building the TLD metadata service with Effect (case study) 23:20 Takeaways from using Effect in production 27:04 Future plans: Cluster, Workflows, and Domain Search ______________________________________ Dillon Mulroy is a Software Engineer at Vercel, with over 10 years of experience in the JavaScript & TypeScript ecosystem. He is also a regular Twitch streamer of tech content & Effect. X(Twitter): https://x.com/dillon_mulroy Twitch:   / dmmulroy   GitHub: https://github.com/dmmulroy ______________________________________ Effect is an ecosystem of tools to build production-grade applications in TypeScript. Website & docs: https://effect.website/ Community & support:   / discord   Follow us on X (Twitter):   / effectts_   Github: https://github.com/Effect-TS ______________________________________ #Effect #TypeScript #TypeScriptLibrary