The first #Rust speakers are here, but the C4P goes on! You still have over a week - head over to www.rustikon.dev and submit your presentation! #Warsaw awaits :)

New Jox release (#Java virtual-thread based safe concurrency & streaming): * memory optimizations & performance improvements in channels thanks to Andrej Fink * concurrency tests using the Fray library (github.com/cmu-pasta/fray) github.com/softwaremill...

Lots of interesting content on our blog lately :) Michał Zyga on how #Java bytecode gets interpreted, then compiled (sometimes) using C1, C2 compilers into machine code. A quick & informative peek under the hood of the JVM! softwaremill.com/the-long-jou...

Confluent Stretched Cluster 2.5 introduces powerful mechanisms to enhance cross-datacenter resilience while reducing operational complexity. See how replication factor and min.insync.replicas impact the availability and fault tolerance of such an architecture. softwaremill.com/understandin...

Sometimes I feel almost guilty for not using AI in some coding tasks. Am I a boomer-coder, on the verge of going extinct? But then I recall past lessons, when I burned through the monthly electricity consumption of a small town just to coerce AI into writing what I already had in my head.

Meet Beyond the Commit, your new go-to for unfiltered, real-world engineering stories. Ready to listen? 🔊 We launch on November 5th! Stay tuned for more details in the coming days. #BeyondTheCommit #TechPodcast #CTO #RealTalk

Big congrats to our Software Engineer Michał Zyga - now officially a JUGmajster! 🏆 His talk on cutting Java startup time won Best JUG Talk at JDD! ☕🔥 📖 His full article on that topic is here: softwaremill.com/how-to-impro... #JDD #Java #SoftwareEngineering

Using floats to represent money? Really? That's one of the vibe coding failures covered in our "what did we #AI this month" series by @softwaremill.com & VirtusLab More: virtuslab.com/blog/ai/our-...

Turns out local-second, event-driven webapps is exactly what you might have wanted yesterday during #awsoutage. And it's not only hotels (which is the example given in the article): a real-life scenario from Monday is a primary care clinic.

Could you have entirely avoided being impacted by #awsoutage? Probably not - there's way too much downstream dependencies. Being multi-region wouldn't always have helped either. But there are ways to minimize the impact.

Let's put #AI to work: equipped with our expert knowledge on Kafka administration & configuration debugging, KafkaPilot talks directly to your cluster. Each #Kafka setup is slightly different, but then adaptability is what makes AI stand out from traditional solutions.

Looking for a job that respects your craft? Check out our open roles. 🔗 Senior Scala Developer: softwaremill.com/join-us/seni... 🔗 Senior DevOps Engineer: softwaremill.com/join-us/seni... 🔗 Senior Product Designer: softwaremill.com/join-us/seni... #DevJobs #RemoteWork #HiringNow #DevOps #Scala

Today at #SingaDev in #Singapore: 10 things you might want to know about #Java's Virtual Threads. Simplified, maintainable programming model with performance known from reactive programming - what's not to like!

Congratulations to Martin Odersky for receiving the Programming Languages Achievement Award @icfp-conference.bsky.social - well deserved! :) I can only confirm what it says on the citation, his work deeply impacted how I view programming. Let's work towards making #Scala a continued success!

We've just released sttp-ai 0.4.0 (formerly sttp-openai): you can now find clients for both OpenAI and Claude APIs. Same as sttp-client, the library works with any #Scala ecosystem: direct-style (synchronous), Future, cats-effect & ZIO. Enjoy! github.com/softwaremil...

If you're at #icfpsplash25, join the #Scala workshop which runs now - all of Monday - and Tuesday morning. Lots of interesting talks! I'll be speaking as well, hopefully adding something interesting to the lineup: How functional is direct-style? See you there!

Do firmy, która jest całkowicie zdalna i nie planuje tego zmieniać, szukamy specjalistów od #Scala #DevOps #Rust #ProductDesign #UX #UI :) #remote #work #Poland

This concludes our Ox feature tour - hope you've enjoyed it as much as we did! If you feel a feature is missing, or if you have a suggestion for an integration, just create an issue, we'll be happy to assist: github.com/softwaremil...

Ox feature tour, day 19: because it's direct style, integration with OpenTelemetry (metrics+logging+tracing) "just works"! To propagate tracing context inside concurrency scopes, you only need a single switch at your top-level `OxApp`!

Long overdue, but multipart support in Tapir's #Netty-sync server is finally here! Thanks to Amandus Thorsrud for the PR! Enjoy :) github.com/softwaremill...

#Scala times: 600 issues & counting. Tirelessly compiled by @hoborg.bsky.social! scalatimes.com

2025.10.02 edition now out, featuring: @noeldemartin.com @germanjablo.bsky.social Akshay Kumar Francois van der Merwe @powersync.com Marco Bambini @sqlitecloud.bsky.social @warski.org Ryan Tan @mweidner.bsky.social @spacetimedb.bsky.social ...

Although the AI companion is a significant, positive change in developers’ work, with great power comes great responsibility. Check out the latest issue of This Month We AIed: virtuslab.com/blog/ai/ai-s... and discover what ​​experiment inspired Marcin to such reflections 🤔 #cursorAI #aiagents

Next-next Thursday (16 October) on the #SingaDev #Java meetup in #Singapore: 10 things about Virtual Threads you might want to know! That's in two weeks, but you can sign up today :) Hope to see you there! www.meetup.com/singadev/eve...

In October, you will have another chance to meet our experts! Here's where 👇 🔹 The Scala Workshop: Adam Warski 🔹 The Hack Summit: Sebastian Rabiej 🔹 Kielce JUG meetup: Michał Zyga 🔹 JDD 2025: Rafał Maciak, Sebastian Rabiej, Michał Zyga 🔹 Toruń JUG meetup: Sebastian Rabiej

Ox feature tour, day 17: converting exceptions to `Either`s, and vice versa is trivial thanks to the inline `.catching[]` and `.orThrow` methods. A panic at one level, might become an expected error at another!

Are you a #Scala or #Rust engineer? Time to turn the projects you've worked on, OSS software, case studies, tools you've discovered (including AI) into abstracts, and submit them to @scalar-conf.com and @rustikon.dev!

Ox feature tour, day 16: we propose error handling based on "panics" (exceptions) and "expected" errors, represented as Eithers. Working with the lattter is ergonomic thanks to Scala's boundary/break, and its Ox-provided specialization to Eithers using `either: and `.ok()`

Implementing backend->frontend DB synchronization is a breeze with @electric-sql.com. What about the other direction? Electric documents a couple of ways to handle client-side writes, I'd add event-driven: buffering events on the frontend, event sourcing on the backend.

The latest release of openapi-generator includes a brand new sttp4 + scala3 + jsoniter integration! Thanks to the work by Łukasz Biały & Kamil Lontkowski! github.com/OpenAPITools...

Ox feature tour, day 15: Flows provide integration with Kafka, allowing one to implement the common publish-then-commit pattern using an elegant high-level, functional API.

Structured Concurrency is coming to #Java - we can now test the 5th preview of the API. Orchestrating IO-bound tasks is already much easier and safer then before, but some problems remain. Details in the article: softwaremill.com/critique-of-...

Ox feature tour, day 14: declarative concurrency in flows - virtual threads are started (and terminated on error) safely, without ever needing to touch concurrency scopes! Signalling an error is as easy as throwing an exception.

Jox: Virtual-thread based safe concurrency & streaming is now fully migrated to work with Java 25! The `channels` module will work with any Java 21+, while `flows` (react-streams-compatible, blocking streaming) now requires Java 25. github.com/softwaremill...

Ox feature tour, day 13: flows provide I/O integration, declarative concurrency, and reactive streams compatibility!

Ox feature tour, day 12: describe data streaming using operators you know and love from Akka Streams or FS2, using direct-style (no Futures or other wrappers!)

What did we #AI this month? * Java 8->21 migrations, comparing Claude Code & Cursor * researching Cline’s Focus Chains * developing webapps with multiple Claude agents (react dev, reviewer, scribe) * does Cursor need supervision? Read more: virtuslab.com/blog/ai/ai-s...

Ox feature tour, day 11: select exactly one clause to complete from a number of channels. This is the select you might know from Go: complementing the goroutine equivalent - forks (virtual threads) within a concurrency scope

🛎️ Imagine this: You arrive at a hotel after a long drive, ready to relax. But the front desk can’t check you in because the Internet is down. Is this the best we can do? Can we build smarter, more resilient tech? @warski.org explores this in his latest blog post: softwaremill.com/local-second...

Internet down? You can't check-in to your hotel - or worse. Are we doomed to depend on online servers? Not necessarily! "Local-first" is one option, "local-second" might be another: softwaremill.com/local-second...

Ox feature tour, day 9: use OxApp to conveniently access a top-level concurrency scope (for running app-wide background jobs), as well as ensure proper cleanup on external interruption (SIGINT/SIGTERM)

The work on JEP-505 led to the official introduction of structured concurrency in Java 25. That’s why we’ve refreshed our definitive guide on Structured Concurrency and Scoped Values. 🔗 Check out the updated article now: softwaremill.com/structured-c... #Java #JEP505 #StructuredConcurrency #Java25

🚨 As you may already know, a critical npm supply chain #attack was reported yesterday. ➡️ What happened? Several of popular npm packages were compromised, including #debug and #chalk among the "biggest ones" 🔗 See the full analysis & list of major affected libraries: www.aikido.dev/blog/npm-deb...

Ox feature tour, day 7: manage resources using try-catch-finally, for convenience written inline, using an inline method (a "zero-cost abstraction").

Continuing with observability, latest Tapir now supports #Scala cats-effect otel4s both for tracing & metrics, thanks to Illia Tkachuk. Plus, we're closer to releasing a client module for Scala Native, thanks to Anton Sviridov. github.com/softwaremill...

Our realworld-tapir-zio template, using #Scala+ZIO+Quill+Tapir, just got a significant update by Gastón Schabas, adding monitoring using the integrations provided by the libraries. Plus a Grafana dashboard. Check it out: github.com/softwaremill...

Ox feature tour, day 6: rate limit access to APIs or other resources using a straightforward direct-style API! Runs within a concurrency scope, ensuring proper error handling.

Ox feature tour, day 5: the same schedule can be used for defining repeats. Bonus: you can also create a schedule from a cron expression!

Hey, #ScalaCLI v1.9.0 is out! It's a small update which brings support for the new Scala 3 nightly repository. You can now try out the latest Scala 3.8 nightlies, and with it - the new, capture-checked Scala 3 standard library. (1/2)

In Bootzooka - our direct-style #Scala service template - there's a single source of truth when it comes to HTTP endpoints: the code-first description in the backend.