Another version of Kyo is out! 🎉 As usual, it ships with plenty of updates, but this release is mostly about kyo-sql: native PostgreSQL and MySQL drivers running directly on Kyo's async stack with their own wire protocol implementations - no JDBC involved! 🔥 github.com/getkyo/kyo/r...

Release v1.0.0-RC6 · getkyo/kyo

v1.0.0-RC6 ships Kyo's own SQL module. kyo-sql pairs raw SQL with a typed DSL that mirrors SQL syntax, and underneath there is no JDBC: the drivers speak the Postgres and MySQL wire protocols direc...

github.com

On the latest Rock the JVM, Daniel Spiewak explains how targeting Scala Native for Cats Effect 3.7 improved the entire engine even on the JVM, why DevOps is #Scala 's next big frontier, what it takes to scale your career to Distinguished Engineer, and more.

Based in Warsaw 🇵🇱? Netflix is hiring, and this might be for you: explore.jobs.netflix.net/careers/job/... #scala

Distributed Systems Engineer 5 - Data Platform Poland | Warsaw,Poland | Netflix

Netflix is one of the world's leading entertainment services, with over 300 million paid memberships in over 190 countries enjoying TV series, films and games across a wide variety of genres and langu...

explore.jobs.netflix.net

There is a new #Scala 3 optics library worth checking out: cats-eo. It unifies optic families under a single trait, features macro derivation backed by Hearth and delivers massive performance gains (such as traversals running up to 11x faster compared to Monocle).

⚠️ There is a proposal to change the default Seq implementation from List to Vector. It makes sense, but I personally would rather keep the status quo to avoid unexpected runtime changes while people are still migrating from #Scala 2 to 3.

What a beautiful way to start a Friday 🤣

Two signs your domain model is incomplete: ❌ You need an 'if' statement ❌ You are adding another optional argument to a function Model your actual domain states with ADTs. Stop patching logic. #scala

I started using Herdr about two weeks ago, and I can confirm it's really good! But to be fair, I didn't use tmux - I migrated from a plain Ghostty terminal.

Metals v1.6.8 out 🎉 A bit of a curious release - lots of fixes for Java, Bloop and old school editor workflows. Still, a massive effort with 119 merged PRs! scalameta.org/metals/blog/... #scala

Metals v1.6.8 - Osmium | Metals

We're happy to announce the release of Metals v1.6.8, which includes a few

scalameta.org

You know what that means, right? Some library is getting a massive performance boost! This time it's Scala Yaml, which is up to 10x faster with ~20x lower memory allocation per operation! 🤯 #scala

Is it a case of AI psychosis if I use Claude, Codex, Gemini, and Grok every day? 🤔

Could anyone tell me what is wrong with this description? It's concise, includes settings and a complete repro. Also, saying that it violates policy when you have no policy regarding LLMs is pretty ironic. #scala github.com/typelevel/ca...

Tracing static init fails on the Scala.js WebAssembly backend · Issue #4608 · typelevel/cats-effect

Summary I'm adding WASM support to Kyo and there's at least one blocker to support it in modules that integrate with cats-effect. On the Scala.js WebAssembly backend, constructing any IO throws jav...

github.com

Hey, #Java developers! Your domain models are leaking bugs and you need to fix them immediately! Start using records + sealed hierarchies. They give you:

In case you missed it, Scarf, the analytics platform which you might know from the Sonatype integration, is moving away from #Haskell. 😢

After 7 years in production, Scarf has reluctantly moved away from Haskell

After 7 years in production, Scarf has reluctantly moved away from Haskell — Avi Press

avi.press

Scalafmt gets updated quite often, but I usually don't pay attention to it. But this one is really something. A 50-60% performance boost in a tool every #Scala developer uses daily? Wow! 🤯 github.com/scalameta/sc...

Release v3.11.2 · scalameta/scalafmt

Performance tuning According to benchmarks within this codebase, the changes below may be responsible for 50-60% reduction in memory allocations and wall-clock time of the formatter; this does not ...

github.com

"For several years, I worked with one of the biggest build teams I've ever seen - dozens of people, serving about 2,000 engineers. They were all writing really amazing #Scala code" blog.engflow.com/2026/07/10/d...

Why is everyone looking for bottlenecks when it comes to agentic coding? 🤷 Relax and enjoy the speed of development. Just a half year ago we were slower by a magnitude. Don't be greedy - we are moving incredibly fast right now. Just build!

#Scala Days 2026 is tweaking its format a bit. The old continuous talk tracks will be replaced with a more conversational setup: ⏱️ Focused 30-minute talks 💬 Dedicated discussion time after every session 🤝 Hands-on Interactive Labs scaladays.org/scala-days-2...

Scala Days 2026: Making Space for What Matters

For Scala Days 2026, we've kept everything that makes Scala Days... Scala Days, while designing the experience around the people who make it special.

scaladays.org

What dependent types does #Scala 3 support? This article covers them all plus adds real-world use cases like codecs and database schemas 👇 blog.rhetoricalmusings.com/posts/dep-ty...

Wait, you have to manually write JSON en/decoders in OCaml? 🧐 Anyway, this two parts series explores OCaml from a Scala developer's lens 👇 1️⃣ covers the baseline - comparing tooling and a simple Hello World app 2️⃣ the real highlight - building a simple CRUD app to explore HTTP libs and JSON encoders

Good news! The issue with large custom fonts should be fixed now. It'll be shipped in both LTS versions (Scala 3.9 and 3.3.x).

Matej Cerny@matejcerny.bsky.social · 2mo ago

🚨 Sonatype Central introduced soft rate limits a few days ago, with the plan to enforce them on August 11, 2026. My humble namespace was flagged after one release! 🙄

"The second best programming language..." Technically correct to place Java after Scala, but I would argue about the second place 😀 #java www.youtube.com/watch?v=F4MC...

Java biggest upgrade in decades

YouTube video by Awesome

youtube.com

Tbh, I don't like using Git from the terminal. I have some shortcuts, but I prefer to use a visual tool. IntelliJ has the best UI for doing standard things, but their context menu is hardcoded. Zed recently introduced custom tasks in the context menu and it's just awesome! Look how clean it is!

ScalaSemantic is great for giving coding agents structural context over blind grepping. But running Metals and a separate MCP isn't the best UX. Since Metals already uses SemanticDB, it would be amazing if it adopted these features natively! 🙏 #scala medium.com/@victorkalin...

It Hurts to Watch an AI ‘grep’ My Scala | ScalaSemantic

I built a small tool that lets AI assistants, like Claude, understand Scala structure and relationships instead of reading code as plain…

medium.com

Long story short, phase one of improving Scala's API docs is done! Only parts that already had Scaladoc were improved, plus all syntax was migrated from wikidoc to markdown.

🚨 Security Update: http4s v0.23.35 is out! This is a major security hardening release addressing multiple vulnerabilities across Ember HTTP/2, public websockets, DigestAuth, FollowRedirect middleware and static content. Upgrades are strongly encouraged ☝️ github.com/http4s/http4... #scala

Release v0.23.35 · http4s/http4s

This is a security hardening release that comes as a result of two independent scans. Upgrades are strongly encouraged if you are: Running Ember HTTP/2 Running behind an unhardened proxy Exposing...

github.com

This is a great resource if you want to understand what's going on under the hood with different Spark joins. It breaks down the selection conditions, internal mechanics and physical plans. Everything is walked through step-by-step using examples and diagrams. 👇 #spark youtu.be/FfMoKQM6oLYW

Scala CLI v1.15.0 is out! 🎉 ⚡️ WebAssembly support ☕️ JShell integration 📝 Java snippets in Markdown 🧪 JUnit 5 (Jupiter) support 🚀 Scala 3.8.4, Scala.js 1.22.0 and Scala Native 0.5.12 🛠 SBT 2.x export by default github.com/VirtusLab/sc... #scala

Release v1.15.0 · VirtusLab/scala-cli

Default Scala 3.8.4, Scala Native 0.5.12 & Scala.js 1.22.0 This Scala CLI version bumps the default Scala version to 3.8.4, Scala Native to 0.5.12 and Scala.js to 1.22.0. scala-cli version # Scala ...

github.com

Even though Project Valhalla's improvements might seem less relevant to Scala since we have had value classes for over a decade and opaque types for several years, it is definitely worth reading how our underlying "assembly" language is evolving. #java www.jvm-weekly.com/p/project-va...

Project Valhalla, Explained: How a Decade of Work Arrives in JDK 28 - JVM Weekly vol. 180

The new JVM Weekly is here... and Ragnarok seems to come, as we finally have Valhalla in the JDK. However, situation is a bit... nuanced.

jvm-weekly.com

Do you remember Stack Overflow? Apparently they still run the Developer Survey. I'll probably fill it out, just out of nostalgia 🤷 stackoverflow.blog/2026/06/23/t...

The 2026 Developer Survey is now open (for human developers only)! - Stack Overflow

stackoverflow.blog