Typelevel

My first time in Copenhagen! Looking forward to connecting with functional programming friends at the @typelevel.org meetup tomorrow hosted by our sponsor famly.co 😸 there’s still space to join us! luma.com/ncpbarok

Don't miss this innovative interactive lab by Technical Steering Committee members Maks and Antonio. You will develop your problem-solving skills as you learn to interpret telemetry signals, diagnose incidents, and ship mitigations in a realistic demo application built on the Typelevel stack.

Before I head to @scaladays.org in Berlin I am stopping in Prague and giving a talk at the Functional JVM meetup! www.meetup.com/functional-j...

What if you could improve the performance of a fundamental functional data structure—the singly linked list—with one simple modification? Find out in L's talk about his Google Summer of Code project, mentored by Sergey Torgashov and based on an idea from @posco.dev.

We are adding one more stop to the Typelevel Traverse series! Join us in Copenhagen for a workshop and talks by @armanbil.ge and Kathryn Frid. Thank you to Foundation sponsor Famly for hosting! luma.com/ncpbarok

Caching boosts performance, but implementing it safely is challenging. At #ScalaDays, Katrina Petrevice will show how Cats Ref enables thread-safe, testable caches while preserving functional purity. Details: scaladays.org/sessio... 12–13 October · Berlin

I created Calico to scratch an itch: what if I could use Cats Effect and FS2 to build delightful, reactive webapps? Join my interactive lab and let's find out together! I am excited to teach you about fibers and monads and we will watch them come to life in our browsers. www.armanbilge.com/calico/

Check out our new contributing guidelines for Typelevel projects, with special guidance for new contributors! They cover where to start on an issue, copyright, how to structure pull requests, and permitted use of AI tools. typelevel.org/blog/contrib...

Very exciting talk about a highly ambitious Google Summer of Code project by Mariusz Jakoniuk to bring the Typelevel stack onto Wasm/WASI! Supporting an entirely new platform is challenging, and even more so when the toolchain and target are still experimental 😅

Last year, I debuted at #ScalaDays with "A Typelevel Retrospective", reflecting on my open source journey with @typelevel.org. This year, I'm back with "A Typelevel Prospectus", sharing exciting updates in our tech and governance. Join me to learn who we are, how we work, and why to get involved!

Learn about open source security from Typelevel TSC and Security Team member Antonio Jimenez! His talk will share what we learned from the @securitylab.github.com in the @github.com Secure Open Source Fund. P.S. Going to Scala Days in Berlin? Join our co-located Typelevel meetup! lu.ma//iyv37emv

Typelevel has graduated from the @github.com Secure Open Source Fund! Following an intensive three-week program run by the @securitylab.github.com, we are applying what we learned to harden Typelevel's security posture. More on the blog: typelevel.org/blog/github-...

Giovanni Ruggiero's talk at #ScalaDays will feature the Typelevel stack—particularly the application of #otel4s for feeding runtime telemetry back into the code-generating pipeline as #ScalaCheck property tests!

Welcome to the new members of the Typelevel Technical Steering Committee! They will work together to promote, advance, and steward our ecosystem. typelevel.org/blog/tsc-202...

Meet the Typelevel community in Berlin, London, and Málaga this October! Join one of our events to make friends, learn functional programming, and work on open source together 🥰 typelevel.org/blog/travers...

I am excited to speak at the Scala Enthusiasts Meetup on April 29 in my hometown of Boston! In my talk, we will dive into the design and engineering that enable the unique "superpowers" of Cats Effect and learn how to leverage them to build scalable applications. www.scalateams.com/events/bosto...

Apply to join the Typelevel Technical Steering Committee! We want to bring together a diverse group of contributors, users, and enthusiasts to help steward the Typelevel ecosystem together. Read the blog post to learn more: typelevel.org/blog/join-ts...

Cats Effect v3.7.0 is here! This is a relatively small but mighty release that brings full support for Scala Native 0.5: you can now write multi-threaded apps using polling I/O and compile them to native binaries. Stay tuned this week as the release train continues 🚂 github.com/typelevel/ca...

The Typelevel Foundation was determined to be a 501(c)(3) public charity! This is a testament to the intellectual merit and educational value of our community's contributions to functional programming. Congratulations! typelevel.org/blog/charity...

We are excited to announce our participation in Google Summer of Code 2026! Please share this opportunity with students and early-career developers who are interested in functional programming and open source 😺 typelevel.org/blog/gsoc-20...

We just launched a new typelevel.org built with the #typelevel stack! Read the blog post by @armanbil.ge and Andrew Valencik to find out what's next and how you can help 😸 typelevel.org/blog/typelev...

New video! Featuring cats-mtl and its relatively recent additions of the allow/rescue mechanism, AKA scoped capabilities. https://www.youtube.com/watch?v=cTKWpYMciV8

#otel4s v0.15.0 is released 🎉 It brings several QoL improvements and a few breaking changes, especially around testkit builders. github.com/typelevel/ot...

Part 2 of Maksym's series on #scala #observability with #otel4s! ochenashko.com/practical-ob...

how exciting, Maksym Ochenashko is writing a series on #observability in #scala applications! Maks is a prolific maintainer of #otel4s and #cats-effect. ochenashko.com/practical-ob...