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
This Week in Effect - 2025-08-15
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 3.17 Release.
- Durable workflows in TypeScript with
@effect/workflow- currently in alpha. - Effect AI integration packages,
@effect/ai- currently in alpha. - Effect crossed 10K Stars on GitHub 🌟.
- The Effect community on Discord reached 5050+ members!
Here are all the technical changes from the past week.
- Respect disableToolCallResolution flag in stream call (Bug Fix)
- Add support for OpenAi GPT-5 options and AiLanguageModel.embedMany (Feature)
- Fix: Tool calls with no argumets get ignored (Bug Fix)
- Only trigger Reactivity invalidation on successful mutation (Bug Fix)
- Add setMany to ResultPersistence (Feature)
- HttpServerResponse.redirect defaults to 302 Found status (Improvement)
- Add HttpServerResponse.expireCookie (Feature)
- Add cors to HttpLayerRouter rpc example (Documentation Update)
- Ensure user input is always offered to the terminal mailbox (Bug Fix)
- Adjust xForwardedHeaders middleware to always use x-forwarded-for (Bug Fix, next-minor)
- Support multiple HttpLayerRouter.addHttpApi (Feature)
- Improve: add flatten option to RpcTest.makeClient (Improvement)
- Expose clientId to rpc request handlers (Improvement)
- Claude Code from Scratch with Effect by Kit Langton.
- Four more videos from the Build an App with Effect series by Lucas Barake.
Implementing a Feature for Effect Workflows & Amazon Bedrock AI provider integration for the Effect AI SDKs 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 fourth episode with Dillon Mulroy, Domains Lead at Vercel, who shares his own journey with Effect and how Vercel gradually adopted it across their Domains platform. Dillon explains why Effect feels like having superpowers for error handling, observability, testing, and more!
More and more companies are adopting Effect in their projects. Here’s a list of companies looking for software engineers with Effect experience:
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Expand.ai: Founding Engineer
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Platonic Systems: Remote Effect Engineers
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Medbill.ai: Founding Software Engineers (full-stack and backend)
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Oneiro Solutions: Software Engineer - Core Team. Join Effect Discord and DM leighman for further info.
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Microsub: TS Developer
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Samsung Food: Full Stack Developer
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Margins: Product Engineer
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Precurion looking for a remote‑first Founding Engineer with Effect experience – See the job posting in the
#job-boardchannel on our Discord. -
Vitalize Care is hiring a full-stack engineer with Effect experience: Full-Stack Engineer
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Embedded Insurance is hiring for a Senior Software Engineering position.
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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-boardchannel on our Discord. -
Software Intelligence Works: Senior Full-Stack Engineer
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14.ai: Founding engineer
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Wander is hiring Software Developers with experience in Effect.
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Stealth team looking for a software engineer with Effect experience – see the job posting in the
#job-boardchannel 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.
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Freckle.io is hiring Platform Engineers with experience in Effect.
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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.
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Job opening for Japanese-speaking developers
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Globe Commerce: Founding Product Engineer
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Introw: Staff Software Engineer
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spring.new, Anthropic’s flagship costumer, is hiring engineers experienced in Effect. See the job posting in the
#job-boardchannel on our Discord. -
ManageSpace is looking for a Senior Developer to mentor other developers and migrate to Effect – see the job posting in the
#job-boardchannel on our Discord. -
coteach.ai is looking for a Software Engineer – see the job posting in the
#job-boardchannel 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-boardchannel 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.
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