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---
pagefind: false
title: This Week in Effect - 2026-04-10
excerpt: "`ServiceMap` renamed to `Context` in Effect v4 Beta. Vibe Engineering with Effect at AIE Europe, Office Hours 24 🔥, and new community projects."
date: 2026-04-10
authors:
- davide_scognamiglio
- mirela_prifti
- michael_arnaldi
tags:
- This Week In Effect
---

import { YouTube } from "@astro-community/astro-embed-youtube"
import Tweet from "astro-tweet"
import TwitchPlayerNonInteractive from "@/components/TwitchPlayerNonInteractive.astro"

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!

- [Effect Documentation](/docs/getting-started/introduction/)
- [Installing Effect](/docs/getting-started/installation/)


**Recent major updates:**

- [Effect v4 Beta](https://effect.website/blog/releases/effect/40-beta/) Release! 🚀
- [Effect AI SDK](https://github.com/Effect-TS/effect/releases/tag/%40effect%2Fai%400.27.0) Release.
- Durable workflows in TypeScript with [`@effect/workflow`](https://github.com/Effect-TS/effect/blob/main/packages/workflow/README.md) - currently in alpha.
- 6250+ community members on [Discord](https://discord.gg/effect-ts).

 

## Technology

### Effect v4 Beta updates

Here are the main changes that landed in `effect-smol`:

- **Breaking: `ServiceMap` renamed to `Context`**: The `ServiceMap` module has been renamed back to `Context`, realigning with Effect v3 naming conventions. This is one of the most impactful changes of the week for anyone already building on the v4 beta.

- **IndexedDB expansion**: Added streaming and offset support to IDB queries, compound index improvements, encoded types for IDB queries, a `.reverse()` method to IDB selects, a `rebuild` API for IDB databases, an improved transaction API, and support for customizing IDB durability. `Model.Class` can now also be used directly for IndexedDB schemas.

- **Schema additions & fixes**: Added `StringFromBase64`, `StringFromBase64Url`, `StringFromHex`, and `StringFromUriComponent` schemas for decoding encoded strings into UTF-8, improved `Schema.encodeKeys` typing, fixed several missing `~rebuild.out` types, fixed duplicate identifier reference reuse, added a compile-time `MissingSelfGeneric` error for Class APIs, and fixed `@category` JSDoc tags.

- **RPC & Entity**: Added `rpc` `ConnectionHooks`, fixed `Entity.keepAlive`, and improved defect handling when building Entity handlers.

- **Runtime & type inference**: Used `NoInfer` in `Layer` constructors to prevent type erasure, fixed cache constructor inference by moving the `lookup` option, fixed type inference for `Effect.retry` when the `times` option is provided, and fixed `Stream.toQueue` types.

- **CLI & HTTP**: Fixed unstable CLI boolean flags, underlined active labels in CLI multi-select prompts, added support for `form-urlencoded` in the OpenAPI generator's HTTP client format, and added a docs section on customizing schema error responses in `HttpApi`.

- **PostgreSQL & internals**: Guarded transaction acquire failures in `PgClient.fromPool`, returned resolvers directly from `SqlModel.makeResolvers`, added `KeyValueStore.layerSql`, and made `Unify.unify` work with the `Layer` module.

You can follow the full changelog directly in the [effect-smol repository](https://github.com/Effect-TS/effect-smol).

 

## Community Highlights

- Michael Arnaldi ran an Effect workshop at the AI Engineer conference in London.

<Tweet id="2041853194368581922" />

&nbsp;

- [effect-sql-model](https://github.com/emergente-labs/effect-sql-model) – an AST-based compiler that turns Effect Schema / @effect/sql model definitions into Drizzle ORM tables. Project by Emergente Labs.

<Tweet id="2029245518749036818" />

&nbsp;

- [spana](https://github.com/wezter96/spana) – a TypeScript-native end-to-end testing framework for cross-platform test automation across React Native and web (Android, iOS, and web) from a single test suite. Project by wezter96.

&nbsp;

- [@catenarycloud/linteffect](https://www.npmjs.com/package/@catenarycloud/linteffect) – Biome Grit rules for declarative Effect TypeScript composition and repository-wide style consistency. Project by Roman Naumenko.

&nbsp;

- [effect-autoagent](https://github.com/mpsuesser/effect-autoagent) – a framework for building, optimizing, and deploying AI agents as Effect services. Project by Marc Suesser.

&nbsp;

- [effect-claudecode](https://github.com/mpsuesser/effect-claudecode) - Write Claude Code plugins with Effect v4. Project by Marc Suesser.



&nbsp;

# Effect Content Update

- Effect Office Hours 24 🔥

<YouTube
id="https://www.youtube.com/embed/BzXg0A5Xsv8?si=nspodD7piUji5iU2"
title="Effect Office Hours 24 🔥"
/>

&nbsp;

- TypeScript-Go with Effect LSP: Setup guide, features, and performance boost.

<YouTube
id="https://www.youtube.com/embed/mUlhau663eM?si=WkkoFUBwmTEYv0dg"
title="TypeScript-Go with Effect LSP: Setup guide, features, and performance boost"
/>

&nbsp;

## Cause & Effect Podcast

Don't forget to listen to our **Cause & Effect** podcast hosted by Johannes Schickling and available on [YouTube](https://www.youtube.com/@effect-ts), [X(Twitter)](https://x.com/EffectTS_/status/2000913813756100778), and audio platforms like [Spotify](https://open.spotify.com/episode/3zMxvB8KVzcBwFarOuxZCb) and [Apple Podcast](https://podcasts.apple.com/it/podcast/reliable-payroll-systems-in-typescript-with-effect-7/id1781879869?i=1000741526055&l=en-GB).

Adam Rankin, CTO at [Warp](https://www.joinwarp.com/), joined Johannes Schickling to talk about using Effect to bring structure and composability to a growing TypeScript codebase, enabling a small, fast-moving team to stay productive while shipping reliable payment & payroll systems.

<YouTube
id="https://www.youtube.com/embed/zxCR6rG4snY?si=E4KoHi_G7RkyusNL"
title="Reliable Payroll Systems in TypeScript with Effect | Adam Rankin | Cause & Effect 7"
/>

&nbsp;

## Effect Job Opportunities

More and more companies are adopting Effect in their projects. Here’s a list of companies looking for software engineers with Effect experience:

- **14.ai**: [Founding engineer](https://14.ai/careers)

- **acemate.ai**: [Senior Backend Engineer / Developer](https://join.com/companies/acemate/15714084-senior-backend-engineer-developer)

- **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](https://discord.com/channels/795981131316985866/796153351372275743/1362610725931061258).

- **Cari**: [Sr. Software Engineer, Backend & Infra](https://www.cari.com/careers/sr.-software-engineer-backend-infra).

- **coteach.ai** is looking for a Software Engineer – see the job posting in the `#job-board` channel on [our Discord](https://discord.com/channels/795981131316985866/796153351372275743/1394724166309253290) and DM *Peter Edmonds* for further info.

- **Embedded Insurance** is hiring for a [Senior Software Engineering](https://embeddedinsurance.bamboohr.com/careers/23) position.

- **Expand.ai**: [Founding Engineer](https://www.expand.ai/careers/founding-engineer)

- **Freckle.io** is hiring [Full-stack Engineers](https://discord.com/channels/795981131316985866/796153351372275743/1478996807106166785) with experience in Effect.

- **Gale**: [SWE Intern - Remote (CAN/US)](https://forms.galevisa.com/r/m6gr7e)

- **Gen**: [Senior Front-End Full Stack Engineer (TypeScript)](https://gen.wd1.myworkdayjobs.com/careers/job/USA---New-York-New-York/Senior-Front-End-Full-Stack-Engineer--TypeScript-_55427)

- **Glide**: [Senior Frontend Product Engineer](https://www.glideapps.com/jobs/frontend-product-engineer)

- **Globe Commerce**: [Founding Product Engineer](https://www.linkedin.com/jobs/view/4264203054)

- **Goblins** is looking for a Product Founding Engineer. See the job posting in the `#job-board` channel on [our Discord](https://discord.com/channels/795981131316985866/796153351372275743/1439740311277404231).

- **Heartbeat**: [Senior Software Engineer](https://jobs.heartbeat.chat/35182)

- **Inato**: [Product Engineers / Fullstack Engineers](https://jobs.lever.co/inato/6df2d1e3-ce0a-487b-a930-840759803d44)

- **Interfere**: [Founding Product Engineer](https://interfere.com/careers/founding-product-engineer-43d5f5aa-1887-4c7d-a8b2-2017169911fd/apply) and [Founding AI Engineer](https://interfere.com/careers/founding-ai-engineer-003772a3-6bcf-4f57-8c3c-5d840117b5e9/apply)

- **Introw**: [Staff Software Engineer](https://join.com/companies/introw/14395111-staff-software-engineer)

- **Lingo.dev**: [Senior Product Engineer - React, Node.js, UX](https://app.dover.com/apply/Lingo.dev/411b24e0-1438-4d24-8f19-d2cb91ca2483/?rs=76643084)

- **Magentus**: [GenAI Solutions Engineer](https://www.magentus.com/career/genai-solutions-engineer/?r=a)

- **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](https://discord.com/channels/795981131316985866/796153351372275743/1389557459949060098).

- **Margins**: [Product Engineer](https://margins.app/jobs/product-engineer)

- **Medbill.ai**: [Founding Software Engineers (full-stack and backend)](https://www.linkedin.com/posts/codingtom_medbill-ai-activity-7260092522708762624-N7TH)

- **Microsub**: [TS Developer](https://x.com/0xdownshift/status/1880013835878154510)

- **Oneiro Solutions**: Software Engineer - Core Team. [Join Effect Discord](https://discord.com/channels/795981131316985866/796153351372275743) and DM *leighman* for further info.

- **PhosPhor** is [hiring engineers](https://phosphor.co/) experienced in Effect. You may also reach out to the Phosphor team on [our Discord](https://discord.com/channels/795981131316985866/796153351372275743/1418407399139578067).

- **Platonic Systems**: [Remote Effect Engineers](https://twitter.com/platonicsystems/status/1861470819861311945)

- **[Precurion](https://precurion.com/)** looking for a remote‑first Founding Engineer with Effect experience – See the job posting in the `#job-board` channel on [our Discord](https://discord.com/channels/795981131316985866/796153351372275743/1362610725931061258).

- **Ressio**: [Senior full stack Engineer](https://crocus-hardhat-6f7.notion.site/Senior-full-stack-engineer-back-end-leaning-28ce06d15219800eb2bcca558d9f0446)

- **Samsung Food**: [Full Stack Developer](https://whisk.bamboohr.com/careers/110)

- **Sellhub** is looking for a Backend Engineer. See the job posting in the `#job-board` channel on [our Discord](https://discord.com/channels/795981131316985866/796153351372275743/1423684096428736652).

- **Software Intelligence Works**: [Senior Full-Stack Engineer](https://remotive.com/remote-jobs/software-dev/senior-full-stack-engineer-2011648)

- **spring.new**, Anthropic's flagship customer, is hiring engineers experienced in Effect. See the job posting in the `#job-board` channel on [our Discord](https://discord.com/channels/795981131316985866/796153351372275743/1405134163287343196).

- **Supermemory**: [Founding Backend / Infrastructure Engineer](https://x.com/i/jobs/1928194391946186862)

- **Superwall**: [Full-stack Mobile Developer](https://x.com/jakemor/status/1972770955500876070)

- **Temper**: [Founding Engineer](https://news.ycombinator.com/item?id=47224903)

- **Tenzir**: [Software Engineer (Product)](https://tenzir.com/company/careers/software-engineer-product)

- **Tranched**: [Full-stack Engineer Web3](https://tranched.fi/careers/fullstack-developer-web3)

- **Trellis AI**: [Product Engineer](https://www.ycombinator.com/companies/trellis-ai) based in SF.

- **Vercel**: [Software Engineer, Domains](https://vercel.com/careers/software-engineer-domains-us-5813134004)

- **Vitalize Care** is hiring a full-stack engineer with Effect experience: [Full-Stack Engineer](https://jobs.ashbyhq.com/vitalize/d907ba5f-0f2f-4bb4-931a-1680d6daf81a)

- **VST**: [Senior Full Stack Software Engineer](https://www.linkedin.com/jobs/view/3854111540/)

- **Wander** is hiring [Software Developers](https://ship.wander.com) with experience in Effect.

- **Warp** is hiring a [Product Engineer](https://www.joinwarp.com/careers/roles?ashby_jid=655962db-5fbe-40cc-a072-9522295b3cbc)

- A **consumer music startup** hiring for an Effect Backend Consultant + a full-time role based in NYC. The job posting is available in the `#job-board` channel on [our Discord](https://discord.com/channels/795981131316985866/796153351372275743/1457499793042575371)

- **French-speaking** startup team led by Stephan Le Dorze is looking for a freelancer to join them - [see his LinkedIn post](https://www.linkedin.com/posts/stephaneledorze_recherche-senior-typescript-developer-activity-7384894173604265984-btNb) for more details.

- Job opening for [Japanese-speaking developers](https://note.com/luma/n/n679d4dcdb363)

- **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](https://discord.com/channels/795981131316985866/796153351372275743/1397684638834491412), DM *jonpage* for further info.

- [**Solid**](https://trysolid.com/) is hiring its early engineering team (Bay Area). The job posting is available in the `#job-board` channel on [our Discord](https://discord.com/channels/795981131316985866/796153351372275743/1455623052636459209)

- **Stealth team** looking for a software engineer with Effect experience – see the job posting in the `#job-board` channel on [our Discord](https://discord.com/channels/795981131316985866/796153351372275743/1362610725931061258).

- **Stealth team** that has already scaled their product to 50K daily active users in the last year, is looking for [Effect Developers](https://x.com/wireless_dev/status/1930314012723687739). DM [wireless](https://x.com/wireless_dev) on X for more 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._


&nbsp;
## Effect Merch Store

The [Effect Merch Store](https://effect.website/merch) offers a selection of Effect-branded items designed for the community. All orders are processed and fully managed through [Printful](https://www.printful.com/).

<Tweet id="1868605126862385238" />


&nbsp;
## Closing Notes

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_