OKAY FINE CLAUDE I'll learn Effect
This Week in Effect - 2026-02-06
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. - 6100+ community members on Discord.
- 13k 🌟 stars on GitHub.
Here are all the technical changes from the past week.
- Backport MessageStorage encoded NonEmptyArray (Bug Fix)
- Backport PgClient.fromPool (Bug Fix)
- Fix(platform): properly join URL paths in HttpClientRequest.appendUrl (Bug Fix)
- Fix(HttpClient): backport retryTransient fixes from v4 (Bug Fix)
- Backport client interrupt error handling (Bug Fix)
If you’re in Paris, don’t miss the upcoming Effect Paris Meetup #6 🇫🇷 on February 3.
To stay informed about future events, visit our Effect Community Events calendar and subscribe for updates.
- Effect and the Near Inexpressible Majesty of Layers - An article by Kit Langton exploring Effect’s
Layertype and dependency injection. Through a satirical pharmaceutical startup scenario, Kit contrasts the pitfalls of traditional JavaScript mocking with Effect’s type-safe, composable approach to services and testing.
- Looks like Claude Opus is even more effect-pilled👀
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How many of us felt like Zack in this tweet?🚀
@EffectTS_ is the only way. I once was lost But now I’m found.
effect-redis- An experimental Effect wrapper for Redis, providing type-safe, composable Redis operations with support for transactions, pipelines, and all major Redis command groups. Project by envoy1084.
effect-gpt- A transformer-based LLM implementation built from scratch using Effect. The project covers tokenization, transformer architecture components, training, and inference, leveraging Effect’s service-based architecture and type-safe error handling. Project by erayack.
effect-url-shortener- A URL shortening API built with Effect that demonstrates functional programming principles, type-safe error handling, and composable effects. Features JWT-based authentication, PostgreSQL integration via Drizzle ORM, and a service-oriented architecture. Project by bishalr0y.
ts-key-not-enum- A package for type-safe comparison of keyboard event.keyproperties with non-printable values. Provides constants and string literal types for standard keyboard keys, compatible with TypeScript’serasableSyntaxOnlyconfiguration. Project by nikelborm.
- Effect Services & Layers (Office Hours 14)
- Orchestrating AI Coding Agents with Linear, Git Worktrees, and PR-based review | Hacking on Lalph 2
- Max and Tim continued working on Lalph - An AI Agent Orchestrator.
Discussing Lalph - Tim's AI Agent Orchestrator x.com/i/broadcasts/1…
- Effect Office Hours 15 went live on Wednesday on X(Twitter)! The edited version will be on our YouTube channel soon.
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.
Adam Rankin, CTO at Warp, 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.
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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14.ai: Founding engineer
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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. -
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. -
Embedded Insurance is hiring for a Senior Software Engineering position.
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Expand.ai: Founding Engineer
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Freckle.io is hiring Platform Engineers with experience in Effect.
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Globe Commerce: Founding Product Engineer
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Goblins is looking for a Product Founding Engineer. See the job posting in the
#job-boardchannel on our Discord. -
Heartbeat: Senior Software Engineer
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Interfere: Founding Product Engineer and Founding AI Engineer
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Introw: Staff Software Engineer
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Magentus: GenAI Solutions Engineer
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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. -
Margins: Product Engineer
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Medbill.ai: Founding Software Engineers (full-stack and backend)
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Microsub: TS Developer
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Oneiro Solutions: Software Engineer - Core Team. Join Effect Discord and DM leighman for further info.
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PhosPhor is hiring engineers experienced in Effect. You may also reach out to the Phosphor team on our Discord.
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Platonic Systems: Remote Effect Engineers
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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. -
Ressio: Senior full stack Engineer
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Samsung Food: Full Stack Developer
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Sellhub is looking for a Backend Engineer. See the job posting in the
#job-boardchannel on our Discord. -
Software Intelligence Works: Senior Full-Stack Engineer
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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. -
Supermemory: Founding Backend / Infrastructure Engineer
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Superwall: Full-stack Mobile Developer
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Tenzir: Software Engineer (Product)
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Tranched: Full-stack Engineer Web3
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Vitalize Care is hiring a full-stack engineer with Effect experience: Full-Stack Engineer
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Wander is hiring Software Developers with experience in Effect.
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Warp is hiring a Product Engineer
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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-boardchannel on our Discord -
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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Job opening for Japanese-speaking developers
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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. -
Solid is hiring its early engineering team (Bay Area). The job posting is available in the
#job-boardchannel on our Discord -
Stealth team looking for a software engineer with Effect experience – see the job posting in the
#job-boardchannel on our Discord. -
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.
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