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This Week in Effect - 2025-11-28
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 build 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 3.19 Release.
- Effect AI SDK Release.
- Durable workflows in TypeScript with
@effect/workflow- currently in alpha. - The Effect community on Discord reached 5660+ members!
Here are all the technical changes from the past week.
- Fix SqlPersistedQueue batch size (Bug Fix)
- Fix:Arr.intersectionWith,differenceWith that Iterable (Bug Fix)
- Immediately set entity keep alive in EntityResource (Bug Fix)
- Allow advisory locks to be disabled (Bug Fix)
- Add TestRunner & SingleRunner modules (Feature)
- Persisted queue (Feature)
- Add dynamic batch size to PersistedQueue based on pending takers (Feature)
- Ensure redis PersistedQueue removes stale pending items on reset (Bug Fix)
- Reset redis staging area on a schedule for PersistedQueue (Bug Fix)
- Use original status code if headers have already been sent (Bug Fix)
- Support HttpApiError unification (Feature, Bug Fix)
- Persisted queue (Feature)
- Fix SqlPersistedQueue batch size (Bug Fix)
- Add dynamic batch size to PersistedQueue based on pending takers (Feature)
- Ensure redis PersistedQueue removes stale pending items on reset (Bug Fix)
- Improve ordering guarantees for SqlPersistedQueue (Improvement)
- Add DurableQueue module (Feature)
- Propagate tracing info with DurableQueue (Improvement)
- Add TestRunner & SingleRunner modules (Feature)
- Setup trusted publishing to NPM (Optimization)
November has been full of community events, from our weekly Office Hours to local meetups in NYC, Berlin, Hamburg, and Sondrio.
Next up is Effect Vienna 🇦🇹 on December 18, organized by Sebastian Lorenz.
To stay informed about future events, visit our Effect Community Events calendar and subscribe for updates.
- Effect mentioned by teej in the special Thanksgiving livestream by ThePrimeagen. Watch from 1:17:12.
- Effect Solutions, a high-level guide for writing idiomatic Effect programs by Kit Langton.
effect.solutions ← 👀 I'm working on some high-level, prescriptive Effect idioms. If anyone wants to try them out, let me know how they fail you! Copy the Agent Instructions into your favorite robot, and it should help you set up your repository. (Very WIP!)
doctor-effectby Kit!presenting 𝚍𝚘𝚌𝚝𝚘𝚛-𝚎𝚏𝚏𝚎𝚌𝚝
- monorepo-library-generator - an Effect-based monorepo library generator with workspace-agnostic architecture. Project by Samuel Ho
- effect-cli-tui by Paul Philp - an Effect-native CLI wrapper with interactive prompts and display utilities for building powerful terminal user interfaces, has been updated to the 2.0.0 version!
- Amin Khansari started a blog series about domain modeling using Effect.
- Dillon Mulroy livestreamed two new episodes of Building effect-cloudflare, Effect TS native bindings for CF 🚀.
- Office Hours 9: Effect Solutions, Tooling, AI and LLM uses and ChEffect - Part 8: A Local-First App built w/ Effect & LiveStore 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 the benefits of integrating Effect into their tech stack.
We’ve published our sixth episode with Louis Vichy, co-founder of OpenRouter, who joined Johannes Schickling and Michael Arnaldi to talk about OpenRouter’s TypeScript stack, their internal tooling powered by Effect, and the engineering challenges of scaling an AI platform processing trillions of tokens weekly.
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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Supermemory: Founding Backend / Infrastructure Engineer
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Ressio: Senior full stack Engineer
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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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Heartbeat: Senior Software Engineer
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Superwall: Full-stack Mobile Developer
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Tranched: Full-stack Engineer Web3
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spring.new, Anthropic’s flagship customer, 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. -
PhosPhor is hiring engineers experienced in Effect. You may also reach out to the Phosphor team on our Discord.
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Warp is hiring a Product Engineer
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Sellhub is looking for a Backend Engineer. See the job posting in the
#job-boardchannel on our Discord. -
Goblins is looking for a Product Founding Engineer. See the job posting in the
#job-boardchannel 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.
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