Coming now ready and hot: Completions! Get smart completions for Effect.Service, Context.Tag, Schema.TaggedRequest and family by using the @EffectTS_ LSP!
This Week in Effect - 2025-05-02
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:
- We started publishing the talks from Effect Days 2025!
- The Effect community on Discord reached 4140+ members!
- Effect featured in the Thoughtworks Technology Radar.
Here are all the technical changes from this week.
- Fix(Metric): summary quantile value when overshoots (Bug Fix)
- Make Effect.liftPredicate and Either.liftPredicate reusable (Bug Fix)
- Schema: respect custom constructors in make for Schema.Class (Bug Fix)
- Improve Match refinement resolution (Improvement)
- Implement stack cleaning for bun (Feature)
- Match the JS API for locale arguments (Optimization)
- Fix refinement narrowing in Match (Bug Fix)
- Allow catching multiple different tags in Effect.catchTag (Feature, next-minor)
- Add Pipeable.Class api (Featue, next-minor)
- Fix link to FiberRef.currentMinimumLogLevel (Bug Fix)
- Fix captureStackTrace (Bug Fix)
- Kill path aliases, use src exports (Optimization)
This week, we published the morning session of the Effect Days 2025 Workshop held by Maxwell Brown. During the class, Maxwell introduced the audience to the basic concepts of Effect, delving into topics like service-oriented app design, managing dependencies and resources with layers, and building testable, modular apps.
-
Mattia Manzati is working on more Effect DX tools, and this week he presented smart completions for Effect.Service, Context.Tag, Schema.TaggedRequest and family.
-
Victor Korzunin finalized the PR in effect-aws/lambda package, which allows creating AWS lambda handler from a defined effect platform HttpApi. It supports API GW v1 and v2, ALB and other events, middleware, and cookies.
Finalized the PR in @EffectTS_ AWS Lambda package, which allows you to crate AWS lambda handler from defined effect platform HttpApi. It supports API GW v1 and v2, ALB and other events, middlewares and cookies. See examples github.com/floydspace/eff…
-
The 5th edition of the Effect Paris Meetup is coming on May 20th, hosted by Spiko and sponsored by Evryg. The meetup will be in French.
The next @EffectTS_ Paris meetup (#5) I'm co-organizing is happening on May 20th! Once again, this edition will be hosted by @Spiko_finance in their brand-new office, and sponsored by @EvrygDotCom Paris folks, be sure to register for the event! meetup.com/fr-FR/effect-p…
-
Dillon Mulroy livestreamed three episodes of his series Building a tool to sync Splitwise and YNAB with EffectTS 🚀 on his Twitch channel.
-
Mattia Manzati was live on Tuesday on Twitch and X(Twitter) with a stream about Building an Effect Tracer using Performance Track!
-
Tim Smart was live on Twitch on Thursday with a new episode of Reimagining ContentLayer with Effect. The episode will be soon available on the Effect 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 published our second episode with Michael Fester from Markprompt about scaling AI-powered customer support with Effect, building reliable and high-performance infrastructure, and enhancing developer productivity in a fast-evolving AI landscape. 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 companies looking for software engineers with Effect experience:
-
Expand.ai: Founding Engineer
-
Platonic Systems: Remote Effect Engineers
-
Inato: Senior Product Engineer
-
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
-
Precurion looking for a remote‑first Founding Engineer with Effect experience. The job posting is available in the
#job-boardchannel on our Discord. -
Vitalize is hiring a full-stack engineer with Effect experience: Senior Full-Stack Engineer
-
Stealth team looking for a software engineer with Effect experience. The job posting is available in the
#job-boardchannel on our Discord. -
Stephan Le Dorze is looking for a French-speaking freelancer to join him in a small team in a startup - see his LinkedIn post for more details.
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