Jon Pretty

Scala 3 developer

[Jon Pretty @propensive]

I am very happy to announce that will be speaking at https://t.co/GvW9fV4Cec in Paris on 17 October!

This will be my first conference talk since 2019, and I'm going to try to make it the best ever! I will introduce https://t.co/sWLJ78721a to the world: a tour de force of all the wonderful things you can do with Scala 3.

I will show you an exciting, optimistic and realistic future for Scala. I will show you how to build CLI and web applications with code that's as easier to read than Python or JavaScript, but just as safe as Haskell.

Thank you to the conference team for giving me this opportunity. https://t.co/GvW9fV4Cec has a special place in my heart: it's always been a delightful, independent and friendly event, and I'm excited to be coming back to Paris!

If you want to see the pinnacle of coding elegance, then please come along!

[Oliver Bračevac @etaconversion]

We've released ATC, a new open-source coding agent based on Tacit. It uses tracked capabilities to control what agents can do, and works with Claude and Codex subscriptions as well as API providers.

Funded by the Swiss Cyber-Defence Campus. Enjoy!

https://t.co/L3PX1s281L

[liufengyun @liufengyun]

It has been a while. I'm happy to present the secure programming language Jo I've been working on: https://t.co/jyBtEOlden

I believe we can solve the sandboxing problem better with compile-time sandboxing: fine-grained permissions at application-level instead of system-level.

[scalaland.io @scalaland]

Chimney 2.0.0-RC1 just dropped, with the final improvements and targeting 3.9.0 - if no serious issues are found it will be promoted to 2.0.0!

https://t.co/DcMIYfnz5H

[Pierre Ricadat @ghostdogpr]

After 6+ years at Devsisters, I’m ready for my next challenge.

I’m a hands-on backend architect with 15+ years of experience designing and building large-scale backend systems, distributed architectures, and high-concurrency live-service game platforms.

I’m also a library author and maintainer in the Scala open-source ecosystem, where I’ve created projects including Caliban, Shardcake, and Proteus. I’d love to continue working primarily with Scala in my next role.

I’m looking for:
- Location: Remote worldwide or hybrid/onsite in South Korea
- Focus: Backend architecture, distributed systems, and lead/principal engineering roles

If you think my experience could be a good fit for your team, feel free to send me a DM. If you know someone hiring, a share or repost would be hugely appreciated!

[Bay Area Scala @BayAreaScala]

Save the date! Scala Summit 2026 is coming to San Francisco Bay Area in October 2026 after #ScalaDays

https://t.co/Im4eFxBYTn

#SFScala #BayAreaScala #scala

[Jon Pretty @propensive]

@ChiefScientist @kitlangton I don't even remember when I still had hair on my head...

[scalaland.io @scalaland]

New Chimney(s) dropped:

1.x line supporting 2.12/2.13/3.3:

https://t.co/sCVznNTVeT

and 2.0.0-M4 supporting 2.13/3.8 freshly migrated to Hearth:

https://t.co/viV7Duxw8h

[Matej Cerny @matej_cerny]

What dependent types does Scala 3 support? This article covers them all plus adds real-world use cases like codecs and database schemas 👇
https://t.co/0jd5FAZeuh

[Jon Pretty @propensive]

@ChiefScientist @sisamon @kitlangton Maybe charging like a battery? Though when I met Luis I was probably discharging.

[Li Haoyi @li_haoyi]

I recently joined https://t.co/vQ3EJfFRQI and we're looking for software engineers to build a AI infra team on-site here in Singapore

If you're in Singapore tired of big-tech satellite offices or boring CRUD apps, and want to work on cutting edge AI infra, please reach out!

[Jon Pretty @propensive]

@makingthematrix I'm not sure how much I'm ready to admit about my laoganma consumption, but I've not tried it with ice-cream...

[Pierre Ricadat @ghostdogpr]

Today I released Sage, a fast and modern Redis/Valkey client library in Scala 3, with support for ZIO, Cats Effect, Kyo and Ox.

It is a RESP3 protocol-native implementation, designed with advanced use cases in mind (pipelining, cluster, caching, etc).

https://t.co/xNn0Jq4BxQ

[Pierre Ricadat @ghostdogpr]

Proteus 0.5.0 comes with a new gRPC backend, for Kyo!

Release notes: https://t.co/gzDaIoxYZ6

[Riccardo Cardin @riccardo_cardin]

#Scala folks, in Italy 🇮🇹 we're approaching the Republic Day, and a new #YAES version is here to celebrate! 🎉 The focus was on testing YAES applications, so we introduced some utilities to deal with effects in tests (mainly for @scalatest).

Check it out! https://t.co/9vb2d0oUON

cc @ScalaTimes
cc @petr_zapletal

[Martin Odersky @odersky]

Very happy that our work on securing agents with tracked capabilities got best paper award at #cais2026! https://t.co/JW4WkxKlDm

[Jon Pretty @propensive]

@alexelcu @matej_cerny terrific speaker

[Matej Cerny @matej_cerny]

Following up on recent posts about Kyo... Here is a great talk by Jonathan Winandy, aka @ahoy_jon, from @scalarconf 2026. Really recommend checking this out if you don't know how special Kyo is!

https://t.co/cgpbW38kNy

[Matej Cerny @matej_cerny]

Is it possible to develop complex GPU pipelines in Scala? 🧠 Spoiler alert, it is! A very well made presentation on Cyfra from @scalarconf 2026. Worth watching even if you know nothing about GPU computations (like me 😀). Btw, it almost matches C++ llama performance! 👇

[Jon Pretty @propensive]

@Ciberon Usually with anything more than about four spinning plates, I'm the bottleneck to getting them spinning again, so it's a disadvantage in merge/rebase churn to go beyond that, for no net productivity benefit.