Latest release of effect/opentelemetry 🚀 It includes new modules that allows you to export otel without the opentelemetry libraries – useful for environments like cloudflare or react native. →Changelog entry: github.com/Effect-TS/effe…
This Week in Effect - 2025-04-18
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 4040+ members!
- Effect featured in the Thoughtworks Technology Radar.
The latest release of effect/opentelemetry includes new modules that allow you to export Otel without the opentelemetry libraries.
Here are all the technical changes from this week.
- Allow Match.typeTags to specify a return type (Feature)
- Fix catchAllCause jsdoc example (Documentation Update)
- Preserve refinement types in Match.when (Bug Fix)
- Allow Pool to acquire multiple items at once (Bug Fix)
- Add effect native otlp exporter (Feature)
- Remove requirement of @opentelemetry libraries in OtlpTracer (Optimization)
- Adjust otel export when max batch size is reached (Bug Fix)
- Include cause in otel exceptions (Bug Fix)
- Make OtlpTracer example more portable (don’t use platform-node) (Optimization)
- Add Effect native OtlpMetrics & OtlpLogger (Feature)
- Disable tracer for Otlp http client (Bug Fix)
- Fix/bug platform permission (Bug Fix)
- Add child_process workers to platform-node (Feature)
- Update RPC README.md (Documentation Update)
- Fix RpcClient worker protocol scopes (Bug Fix)
This week, we published Dillon Mulroy’s Effect for Domains at Vercel talk, where he discusses Effect’s type-driven approach, structured concurrency, and best practices for building scalable, reliable systems in TypeScript.
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Lucas Barake published a video about why he’s leaving tRPC for Effect.
Play -
Samuel Briole, CTO @ Spiko, wrote an article explaining the reasons Effect has now become a core part of their tech stack, highlighting key benefits they’ve gained from using it. 🔗 Why We Chose Effect for Building Spiko
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Michael Arnaldi will be speaking at the CityJS London 2025 on April 25, 2025, about Effect: Production-Grade TypeScript.
- Maxwell Brown and Tim Smart were live on X(Twitter) and Twitch on Tuesday with a new episode of Reimagining ContentLayer with Effect.
Latest release of effect/opentelemetry 🚀 It includes new modules that allows you to export otel without the opentelemetry libraries – useful for environments like cloudflare or react native. →Changelog entry: github.com/Effect-TS/effe…
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:
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Expand.ai: Founding Engineer
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Platonic Systems: Remote Effect Engineers
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Inato: Senior Product Engineer
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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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Stealth team looking for an Engineer with experience in Effect. 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.
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Precurion looking for a remote‑first Founding Engineer with Effect experience. The job posting is available 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.
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