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This Week in Effect - 2025-06-27

Hi Effecters!

Welcome back to This Week In Effect (TWIE) - your weekly update of the latest developments in the Effect community and ecosystem.

Effect is a powerful TypeScript library that helps developers create complex, synchronous, and asynchronous programs. One key feature that sets Effect apart is how it leverages structured concurrency to provide features such as async cancellation and safe resource management, making it easier to build robust, scalable, and efficient programs.

To get started, below you’ll find links to our documentation as well as our guide for installing Effect. Enjoy!

Recent major updates:

 

Giulio Canti shared some sneak peeks of the upcoming Effect Schema v4:

Here are all the technical changes from the past week.

 

A Voice AI Orchestration Layer built with Effect & TypeScript.

In this episode, Johannes Schickling sat down 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.

Play

Cause & Effect features stories from software engineers and companies that use Effect in production. Each episode explores their journey of adopting Effect, including the learning process, challenges faced, and benefits of integrating Effect into their tech stack.

The podcast is hosted by Johannes Schickling and available on YouTube, X(Twitter), and audio platforms like Spotify and Apple Podcast.

 

  • Effect was trending on GitHub this week! 📈🚀

 

  • Matt Pocock started exploring Effect, sharing its capabilities and the value it brings to the TypeScript ecosystem. We’re excited to see what he’ll share next.

 

  • New video from Lucas Barake: Building an App with Effect | #1: Your First Server
Play

 

 

  • An example of deploying Effect Cluster to your AWS account with SST.

 

  • Use Effect AI to generate a schema, by Harry Solovay.

 

  • Mattia Manzati will be talking at SquiggleConf 2025 in Boston on September 18-19th.

 

  • effect-memfs – an in-memory file system in Effect for mocking, testing, and simulating files.

 

  • Dillon Mulroy livestreamed three episodes of his new series Implementing RFC-1035 (DNS) with EffectTS 🚀.

     

  • All Effect Days talks are now available on YouTube!

  • Fixing auto-imports in your Effect code with the Effect LSP.

 

More and more companies are adopting Effect in their projects. Here’s a list of companies looking for software engineers with Effect experience:

Disclaimer: Please note that these job postings are shared for informational purposes, and we encourage applicants to verify details directly with the hiring companies.

 

In December 2024, we unveiled the Effect Merch Store with a selection of Effect-branded items designed for the community. All orders are processed through Printful.

 

That’s all for this week. Thank you for being a vital part of our community. Your feedback is highly valued as we fine-tune this format. Feel free to share your thoughts, and we’ll do our best to tailor it to the needs of our community.

Effect Community Team