{ "status": "healthy" } @EffectTS_ live on vercel 😎
This Week in Effect - 2025-01-10
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:
- The Effect Days conference is returning this March 2025! 🎉
- The Effect community on Discord reached 3760+ members!
- Effect 3.12 has been released.
Here are all the technical changes from this week.
- Refine Effect.validateAll return type to use NonEmptyArray for errors (Bug Fix)
- Fix BigDecimal.unsafeFromNumber jsdoc (Documentation Update)
- Schema: move type-level fields (e.g., Type, Encoded) in the Schema implementation lower in the structure to avoid displaying them at the top during console logging (Improvement)
- Fix: ManagedRuntime.Context to work when Context is of type never (Bug Fix)
- Fix inference for contravariant type-parameters (Bug Fix)
- Fixed type-error in @effect/cli README.md (Documentation Update)
- Refactor platform README (HttpApi docs) and fix examples code (Documentation Update)
- Dillon Mulroy posted about using Effect into the Vercel codebase.
- Dillon Mulroy livestreamed two episodes of his series Freelance project with TypeScript, Svelte 5, and EffectTS 🚀 on his Twitch channel.
The Effect Days conference is happening on March 19-21, 2025, and it’s the perfect chance to connect with the Effect community and celebrate the Effect ecosystem in person! Get your ticket! 🎟️
Effect Days is returning this March 2025, set in a beautiful seaside location in Tuscany, Italy! 🇮🇹 Join us for insightful talks, delicious food, and beautiful coastal views. Grab your ticket now! 🎟️ effect.website/events/effect-…
Shout out to one of our sponsors, Inato, a global clinical trial marketplace that brings research to patients where they live. The Inato team is a long-time supporter of Effect and actively advocates for it within the developer community.
We're excited to have @inatohealth as a sponsor of Effect Days 2025! Inato is transforming clinical research by creating a global clinical trial platform that brings research to patients where they live. 🎟️ Book your ticket & join us this March in Italy! effect.website/events/effect-…
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The eighth episode of Re-building Contentlayer with Effect has been published on the Effect YouTube Channel.
Play
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, the learning process, the challenges faced, and the benefits of integrating Effect into their tech stack.
In our first episode, we were joined by Attila Večerek, Tech Lead & Staff Engineer, who discussed how Zendesk incrementally adopted Effect in a polyglot environment with a large codebase. Give it a listen and let us know what you think on our social media or Discord!
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.
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
More and more companies are adopting Effect in their projects—here’s a list of exciting job opportunities that include Effect in their tech stack:
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Superwall: Full-stack TS developer with backend & infrastructure experience.
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Expand.ai: Software Engineer
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Platonic Systems: Remote Effect Engineers
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Inato: Senior Product Engineer
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Medbill.ai: Founding Software Engineers (full-stack and backend)
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inRev: Senior Software Engineer
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Oneiro Solutions: Software Engineer - Core Team. Join our Discord and DM leighman 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.
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