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:
@effect/workflow - currently in alpha.@effect/ai - currently in alpha.
Opaque Structs.🧪 Opaque Structs Goal: opaque typing without changing runtime behavior Status: experimental! Lets you take an ordinary `Struct` and wrap it in a thin class shell whose **only** purpose is to create an opaque ts type Internally the value is still the same plain struct schema
Here are all the technical changes from the past week.
The thing that brought me to @EffectTS_ was not error handling nor DI, but the observability and dev tools that a runtime like that can unlock. I'm a sucker for these! The language service (LSP) is so good, if you aren't using... missing out a big time! There are a lot of other
Building Toyffect A toy version of Effect implemented in 200 lines of code. - Generator-based runtime - Type-safe DI - Naive parallelism
kintone-effect-schema & kintone-functional-query, two libraries showcasing practical Effect-TS usage in production - handling complex validation rules, data normalization, and providing excellent DX with full type inference. Built by Kensei-Kimoto, who is working on a type-safe toolkit for Kintone, a Japanese enterprise platform.
Two more episodes of Implementing RFC-1035 (DNS) with EffectTS 🚀 by Dillon Mulroy on his Twitch channel.
Maxwell Brown and Tim Smart were live on X and Twitch with Working on ChEffect - A Local-First Meal Planning App written with Effect.
Working on ChEffect - A Local-First Meal Planning App written with Effect x.com/i/broadcasts/1…
Debugging in Effect got two new panels: Span Stack & Current Fibers.
The Effect DevTools just got an update! Debugging in @EffectTS_ got two new panels: 1. Span Stack – view a clean trace of spans leading to your breakpoint 2. Current Fibers – see all running fibers and jump straight to the source More here!👇
Building an Effect API Provider Integration for Google (Part 2) & Building an Effect Warehouse App Part 7 and Part 8 are now on our YouTube Channel.
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
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
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 Care 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.
Stealth team looking for a software engineer with Effect experience – see the job posting 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
Globe Commerce: Founding Product Engineer
Introw: Staff Software Engineer
ManageSpace 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.
coteach.ai is looking for a Software Engineer – see the job posting in the #job-board channel on our Discord and DM Peter Edmonds for further info.
Small SaaS team is looking for a part-time Effect Developer to implement Effect in their stack. The job posting is available in the #job-board channel on our Discord, DM jonpage for further info.
Disclaimer: Please note that these job postings are shared for informational purposes, and we encourage applicants to verify details directly with the hiring companies.
The Effect Merch Store offers a selection of Effect-branded items designed for the community. All orders are processed and fully managed through Printful.
Effect Merch is here! We’re excited to announce the launch of our Effect merch page! Grab your favorite swag & show your love for Effect in style! 🧢 effect.website/merch
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
