This Week in Effect - #74

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!

• Effect Documentation
• Installing Effect

Recent major updates:

• Effect crossed 10K Stars on GitHub 🌟.
• Durable workflows in TypeScript with @effect/workflow.
• The Effect community on Discord reached 4750+ members!

 

Technology

Another glimpse of Effect Schema v4 by Giulio Canti about Deriving Structs.

Here are all the technical changes from the past week.

Effect Core

• Remove completion helper overload from Effect.catchTag, to fix Effect.fn inference (Optimization)
• Clarify Array rotate example (Documentation Update)
• Feat: backport Layer.mock from effect-smol (Feature, next-minor)

Effect AI

• Add Google Generative AI Provider (Feature)
• Ensure tool call parts are properly merged when combining AiResponses (Bug Fix)
• Do not use config wrap helper for AI provider layerConfig (Optimization)

Effect Cluster

• Add discard methods to cluster EntityProxy’s (Improvement)

Effect Platform

• Add global middleware to HttpLayerRouter (Feature)
• Make cluster shard manager options consistent between platform (Bug Fix)
• Add HttpLayerRouter.toWebHandler (Feature)
• Add HttpLayerRouter.toWebHandler example to README (Documentation Update)
• Propagate headers to HttpServerResponse.raw(Response) (Improvement)
• Update find-my-way-ts (Improvement)
• Ensure HttpApiClient schemas are composed correctly (Bug Fix)
• Fix(platform): fix KeyValueStore.make type mismatch (Bug Fix)
• Fix handling of failed streams in NodeHttpServer (Bug Fix)
• Feat(platform): add recursive option to FileSystem.watch (Feature)

Effect RPC

• Allow RpcMessage spans to be missing (Improvement)

Effect Workflows

• Suspend parent workflows when child workflow suspends (Optimization)
• Add workflow SuspendOnFailure annotation (Feature)

General Chores

• Fix broken package links in README table
• Add npm version badge to README

 

Community Highlights

• Visual Effect, a collection of interactive examples of Effect by Kit Langton. We highly recommend checking it out — it’s not only a remarkable learning tool but also a beautiful visualizer of how Effect works. ❇️
  

  Kit Langton

  @kitlangton

  · Follow

  I had some fun with @EffectTS_ today. I made some visual effects, if you will, written in Effect + React.

  2:09 AM · Jul 6, 2025

  2.2K

  Reply

  Read 58 replies

 

• Building an App with Effect | #3: Resilient Layers and Building an App with Effect | #4: CRUD API by Lucas Barake

Play

 

Play

 

• Lets demystify Effect.gen by Harry Solovay.
  

  Harry Solovay

  @harrysolovay

  · Follow

  Lets demystify Effect.gen. An introduction to generator functions and how/why they're used in Effect.

  3:09 PM · Jul 6, 2025

  174

  Reply

  Read 11 replies

 

• Studio CMS, a headless CMS for Astro, completed its migration to Effect.

 

• Two more episodes of Implementing RFC-1035 (DNS) with EffectTS 🚀 by Dillon Mulroy.

 

Effect Content Update

Implementing a Feature for Effect Workflows by Maxwell Brown and Tim Smart, who were live on X(Twitter) and Twitch last Tuesday.

Building an Effect-native MCP Server – Part 1 and Part 2 have been published on our YouTube Channel.

Play

 

Play

 

Cause & Effect Podcast

Don’t forget to listen to our Cause & Effect podcast hosted by Johannes Schickling and available on Youtube, X(Twitter), and audio platforms like Spotify and Apple Podcast.

This podcast highlights stories from software engineers and companies using 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.

We’ve published our third episode with David Golightly from MasterClass about 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

 

Effect Job Opportunities

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

• Expand.ai: Founding Engineer

• Platonic Systems: Remote Effect Engineers

• Inato: Product Engineers / Fullstack Engineers

• Medbill.ai: Founding Software Engineers (full-stack and backend)

• Oneiro Solutions: Software Engineer - Core Team. Join Effect Discord and DM leighman for further info.

• Microsub: TS Developer

• Samsung Food: Full Stack Developer

• Margins: Product Engineer

• Precurion looking for a remote‑first Founding Engineer with Effect experience. See the job posting in the #job-board channel on our Discord.

• Vitalize is hiring a full-stack engineer with Effect experience: Full-Stack Engineer

• Embedded Insurance is hiring for a Senior Software Engineering position.

• Betalyra, an AI consulting company from Portugal, is looking for a part-time freelance software engineer (TypeScript/Effect) with AI experience. See the job posting in the #job-board channel on our Discord.

• Software Intelligence Works: Senior Full-Stack Engineer

• 14.ai: Founding engineer

• Wander is hiring Software Developers with experience in Effect.

• Glide: Senior Frontend Product Engineer

• Stealth team looking for a software engineer with Effect experience. The job posting is available in the #job-board channel on our Discord.

• A French-speaking startup team led by Stephan Le Dorze is looking for a freelancer to join them - see his LinkedIn post for more details.

• Freckle.io is hiring Platform Engineers with experience in Effect.

• A stealth team that has already scaled their product to 50K daily active users in the last year, is looking for Effect Developers. DM wireless on X for more info.

• Job opening for Japanese-speaking developers

• VST: Senior Full Stack Software Engineer

• Globe Commerce: Founding Product Engineer

• Introw: Staff Software Engineer

• ManageSpace, a commercial real estate property management startup, is looking for a Senior Developer to mentor other developers and migrate to Effect. See the job posting in the #job-board channel on our Discord.

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

 

Effect Merch Store

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.

 

Closing Notes

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