JRuby Dev Team @jruby
Operated by @headius, @tom_enebo, @hiro_asari jruby.org In your Java Joined September 2008-
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JRuby 10.1.1.0 is released, with a bunch of compat fixes, more performance work, and several third-party CVEs resolved. JRuby 10.1 is our active development branch, with 10.0 being stable. Upgrading is recommended if you want the latest and greatest! jruby.org/2026/07/22/jru…
Our friends over at @fastrubyio have posted a nice compatibility matrix for JRuby versions, covering Ruby and Rails versions. Check it out to see how the versions line up or to learn how JRuby can help you run Ruby and Rails better! fastruby.io/blog/jruby/rai…
JRuby 10.0.6.0 released! Updated jruby-openssl, faster Java interface support, and many other fixes and improvements. JRuby 10.0.x is our LTS version, so upgrading is recommended. jruby.org/2026/06/11/jru…
JRuby 9.4.15.0 is released! This is the last regularly-scheduled release of JRuby 9.4.x and includes the last set of 9.4 fixes. Future releases will be done as needed for commercial JRuby users. Contact us if you need long-term JRuby 9.4 support. jruby.org/2026/06/08/jru…
JRuby 10.1 is released! We've caught up with CRuby 4.0 after less than four months, and pushed a bunch of new optimizations: smaller objects, smaller numerics, and groundwork for many more. We'll maintain 10.0 as our stable line, but do try 10.1 yourself! jruby.org/2026/04/21/jru…
JRuby 10.0.5.0 is released! This round we fixed some memory leaks when embedding multiple JRuby instances, a few pesky Windows bugs, and several Ruby compatibility blockers. Enjoy! jruby.org/2026/04/06/jru…
Today we were informed of a low-severity vulnerability in the bcrypt-ruby gem. We worked with the maintainers to arrange a fix. Upgrading is recommended. CVE-2026-33306: Integer Overflow Causes Zero Key-Strengthening Iterations at Cost=31 on JRuby github.com/bcrypt-ruby/bc…
JRuby 10.0.4.0 is released! A month after 10.0.3.0, we've addressed lots of one-off issues, a few memory and thread-safety fixes, and general compatibility and stabilization work. Enjoy! jruby.org/2026/03/04/jru…
JRuby 10.0.3.0 is released! Over 80 issues and pull requests and 13 external contributors combined to help further stabilize our 10.0 series! There's lots of compatibility fixes, a few performance enhancements, and a number of library updates. jruby.org/2026/02/02/jru…
New post: Warbled Sidekiq: Zero-install Executable for JVM Previously, I showed how to use Warbler to package a simple tool as an executable jar. This post will demonstrate how to “warble” a larger project: the Sidekiq background job server! buff.ly/ZEasNiu
New post: "Packaging Ruby Apps with Warbler: Executable JAR Files" Warbler is the JRuby ecosystem’s tool for packaging up Ruby apps with all dependencies in a single deployable file. Let’s use Warbler to create all-in-one packaged Ruby apps! buff.ly/ZdXcCop
Warbler 2.1.0 has been released! Warbler allows you to package JRuby applications (with obfuscation of code) as a single binary, either a .jar file you can run directly or a .war file you can deploy to any Java application server. Blog post coming! rubygems.org/gems/warbler/v…
We have published Docker images for JRuby 9.4 and JRuby 10 on JDK 25! The -dev images are also updated to latest commits. Give them a try and let us know if there's any issues!
At the end of my post on JRuby and JDK 25 startup time features, I teased a bit of the unreleased improvements from Project Leyden. It turns out the latest commits improve startup time even more, so it seems worth posting a quick follow-up! reddit.com/r/ruby/comment…
New post: JRuby and JDK 25: Startup Time with AOTCache Let's take a look at JRuby's startup time journey, all the way up to using JDK 25's AOTCache and Project Leyden features coming to a JDK near you soon. blog.headius.com/2025/09/jruby-…
JRuby 9.4.14.0 is released! We've updated a bunch of the standard library (including "cgi" to fix a couple of CVEs), fixed a few memory leaks and a bunch of compatibility issues, and generally stabilized things. Upgrading is recommended! jruby.org/2025/08/28/jru…
JRuby 10.0.2.0 is released! This is a small release to fix an ArgumentError regression in JRuby 10.0.1.0 plus a few other small fixes. Recommended upgrade for all, but let us know if you run into any issues! jruby.org/2025/08/07/jru…
We have just released JRuby 10.0.1.0, our first update to JRuby 10! There's dozens of patches including full support (finally) for Zeitwerk and a bunch of Ruby 3.4 language fixes. Upgrade today and let us know how it goes! jruby.org/2025/07/17/jru…
We have released jruby-maven-plugins 3.0.6, updating JRuby to 9.4.13.0 along with several other improvements. But more exciting: Warbler is BACK! We've updated it for latest JRuby and dependencies and it's running green in CI. Time for feature requests! github.com/jruby/warbler/…
FYI: now that Ubuntu 20.04 is EOL, future releases of the JRuby Docker image will be based on Ubuntu 22.04. This will take effect with releases 9.4.14.0 and 10.0.1.0, whenever they happen. See github.com/docker-library…
Charles Oliver Nutter @headius
14K Followers 217 Following JRuby guy, Java, Ruby, OSS business liaison. Find me: @[email protected] or @headius.bsky.social Sponsor me: https://t.co/G5oUTdTJqA
Chris Seaton @ChrisGSeaton
4K Followers 2K Following Researcher at @Shopify // PhD in Ruby // Founder of @TruffleRuby // Squadron Leader of the Cheshire Yeomanry 🦊
Benoit Daloze @eregontp
2K Followers 458 Following Expert in dynamic language runtimes and JIT compilation, @TruffleRuby lead, Rubyist. Moved to https://t.co/wSsFbEBXgK
Jeremy Evans @jeremyevans0
4K Followers 53 Following Principal Software Engineer @UbicloudHQ. Ruby Committer. Author of "Polished Ruby Programming". Maintainer of many ruby gems. OpenBSD ruby ports maintainer.
Hiroshi SHIBATA @hsbt
8K Followers 199 Following @[email protected]: A member of Ruby core/RubyGems/Bundler team, Administrator of *.ruby-lang.org, https://t.co/rdx69wmQZK, Fellow at ANDPAD, Inc.
Kevin Menard @nirvdrum
1K Followers 868 Following Ruby compiler enthusiast. Mastodon: @[email protected]
Miguel de Icaza ᯅ�... @migueldeicaza
100K Followers 6K Following Fun Stack Vibing. Started Xamarin, Mono, Gnome; was MSFT/.NET/Xamarin/Mono/VSMac/AI https://t.co/QkbDDWMXRf @migueldeicaza.bsky.social
Stan Lo @_st0012
2K Followers 729 Following Ruby committer / @Shopify Ruby DX / Building https://t.co/PNFysfwND7 / Maintain Ruby's tooling infra and documentation
tom_enebo @enebo@mast... @tom_enebo
1K Followers 250 Following Co-lead of JRuby. Ruby Hero. Java. Rust. Running. Beer.
RubyConf Thailand @rubyconfth
705 Followers 922 Following Join us the 30th JAN - 1st FEB, 2026 in Bangkok, Thailand to talk all things Ruby! A community-driven conference.
Tim McNamara @timClicks
26K Followers 3K Following On the planet to build a better planet. Software person, kind of into Rust and creative coding. Author of Rust in Action (https://t.co/qgWenxBkeP).
Lucian Ghinda @lucianghinda
5K Followers 3K Following Product Engineer, Ruby on Rails Developer Curator of @shortrubynews Trainer at https://t.co/XFRrJeCJ6K
Tobias Pfeiffer @PragTob
3K Followers 979 Following Likes people. Teamplayer, Open Source Enthusiast, Software Developer, Benchmarker, TDDer, Speaker. Ruby, Elixir, JavaScript. Runs @rug_b. Loves green.
Fabio Makita @AkitaOnRails
92K Followers 417 Following Agile Senior Vibe Coder 🦅😂 Assine a Newsletter The M.Akita Chronicles https://t.co/2wEqX99wye 🇺🇸🇯🇵🇮🇱 Gritando pras nuvens
Bozhidar (Bug) Batsov @bbatsov
9K Followers 891 Following Hacker. Lover of parentheses. Emacs fanatic. Author of RuboCop, CIDER, Emacs Prelude and Projectile. Maintainer of nREPL. Not the best, but pretty good.
Ignacio Vacca @ignaciovacca
472 Followers 1K Following Tímido, vago y haragán River Plate ♥ Estudiante
Alejandro Barrera Apo... @abarreraaponte
175 Followers 1K Following Husband & Dad. CTO @ CarbonSuite Inc
Peter Thomas @ptrthomas
4K Followers 4K Following Co-founder https://t.co/D1mZAXW9nE (YC W22) & creator of @getkarate - the only open-source tool that unifies API testing, mocks, performance and UI automation
Ikaika McKeague @cmckeague
254 Followers 2K Following 𝖳𝗁𝗈𝗎𝗀𝗁𝗍𝗌 💭 𝖿𝗋𝗈𝗆 𝙗𝙚𝙮𝙤𝙣𝙙 🪐 𝙥𝙖𝙧𝙖𝙙𝙞𝙨𝙚 🗿 Sometimes funny Pokémon Master/Raider fan | Mostly a wise-ass who never grew up.
Stefan Richthofer @stewori
43 Followers 85 Following Scientist, mathematician, problem solver. Responsible for the bigger picture, the smaller picture and the tiny detail at https://t.co/Nd4Re0QfZi.
Douwe Vonk @douwe_vonk
5 Followers 44 Following
Neysha Culley @neysha_cul8838
3 Followers 23 Following
LADY AYASE ❤️�... @Amiraaldah55965
51 Followers 2K Following am lady ayase am a professional dominatrix mistress DM or inbox if you are interested
แมวสยาม @joopeden79
180 Followers 1K Following
Victor Sanikovich @sanikovich
350 Followers 556 Following
B6 @a5_stable
72 Followers 377 Following
Katakura Haruhiko @ktkr_wks
8 Followers 71 Following SaaS企業のソフトウェアエンジニア。 硬軟様々渡り歩いてきたマン。 僕の全てのツイートはその時点での僕自身の意見であり、その後の意見が同じであるかは保障しません。また所属組織の意見でもありません。 僕の全てのRTや❤は実際の投稿者の意見であり、必ずしも僕が賛同を示している訳ではありません。
マナティ / Mana K... @m_k01104
2K Followers 2K Following Software Engineer | RAKSUL | Ruby | Rails | Go | 24卒
dirtyharry @rotoffset02
18 Followers 1K Following
Stilqn Bairski @tripplesteelcs
61 Followers 12 Following FullStack Developer jRuby/Ruby • Rails • JS • PostgreSQL https://t.co/e9MUR9vHkg
Jan Boerman 🚂 @JanBoerman95
310 Followers 908 Following Computer Science MSc - Un deux trois Miranda! - 51💕
CEP @cepcode
0 Followers 58 Following
Fabian @ffaebi
3K Followers 2K Following There is *no* free speech in Switzerland. Posts randomly contain satire and inverse opinions. Repost or like ≠ endorsement. Likes are for *my* algorithm.
Troy Mallory @Cufe_Haco
975 Followers 1K Following Master Electrician. JRuby Core Contributor, creator of the original framework of Windows Ease of Access. Valen-systems Co-founder. Kestówv and Rubian Creator.
Kenned @kenbme_
0 Followers 30 Following
Anusha Santhosh @AnushaKovi
6 Followers 185 Following
Robin Ciubotaru @rocasoftware
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Truth @Jeyso215
2K Followers 7K Following And ye shall know the truth, and the truth shall make you free. - John 8:32
Donlon McGovern @DonlonMcGovern
10 Followers 227 Following
On Code @OnCodeDao
42 Followers 625 Following Welcome To OnCode The Intersection Where Visionaries, Founders, Developers, Engineers & Venture Capital Meet. #OCD Community
Matt Quinn @mjquinn_ca
2 Followers 21 Following Toronto-area programmer @sentry (opinions mine). Software performance & observability. Ruby (and many others).
|7eter l-|. l3oling -... @galtzo
2K Followers 5K Following RubyGems: oauth, oauth2, omniauth-identity, flag_shih_tzu, sanitize_email… BSKY - https://t.co/HcLvPOkcKD Rubyist - https://t.co/YQhvG2f8XM
Alexandre Barret @alxbarret
67 Followers 200 Following 🇫🇷 Web developer, in love with Ruby, keeping things simple and a good refactoring session. check out https://t.co/RJ4NbqPXhD
Willian Tenfen Wazile... @willian_tenfen
10 Followers 43 Following
Rishi Reddy @rishii_reddyy
1 Followers 95 Following
YJ Hou🇨🇳 @Harx2018
2 Followers 159 Following
Headius Enterprises @HeadiusEnts
28 Followers 5 Following Headius Enterprises is the first company to offer professional support for JRuby users! Contact us to learn more!
3llideas @3llideas
123 Followers 221 Following Agencia eCommerce, especialistas Amazon AWS, Solución BI Looker, Software Factory y especialistas en soluciones empresariales Sage
Nodebaz @A07096326
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Leonardo Mezu Lobato @leonmezulobato
511 Followers 2K Following I do code 👨🏾💻 Random and honest opinions about spread interests, fitness nerd wannabe.
Woteight @WoteightEXz
81 Followers 4K Following
Jānis Baiža @jbaiza
338 Followers 277 Following
Francisco mardonio Du... @MardonioD30843
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Charles Oliver Nutter @headius
14K Followers 217 Following JRuby guy, Java, Ruby, OSS business liaison. Find me: @[email protected] or @headius.bsky.social Sponsor me: https://t.co/G5oUTdTJqA
Chris Seaton @ChrisGSeaton
4K Followers 2K Following Researcher at @Shopify // PhD in Ruby // Founder of @TruffleRuby // Squadron Leader of the Cheshire Yeomanry 🦊
Jeremy Evans @jeremyevans0
4K Followers 53 Following Principal Software Engineer @UbicloudHQ. Ruby Committer. Author of "Polished Ruby Programming". Maintainer of many ruby gems. OpenBSD ruby ports maintainer.
tom_enebo @enebo@mast... @tom_enebo
1K Followers 250 Following Co-lead of JRuby. Ruby Hero. Java. Rust. Running. Beer.
Vladimir Dementyev @palkan_tula
5K Followers 379 Following Building web products and dev tools with @EvilMartians 👽 Powering up real-time web apps with @any_cable 🔌
Headius Enterprises @HeadiusEnts
28 Followers 5 Following Headius Enterprises is the first company to offer professional support for JRuby users! Contact us to learn more!
Akira Matsuda @a_matsuda
9K Followers 2K Following Rails committer. Ruby committer. amatsuda on GitHub. Creator of Kaminari. Founder of Asakusa.rb. Chief Organizer of RubyKaigi. Ruby Hero / Rails Luminary. 松田 明
Baq Haidri @baqhaidri
133 Followers 1K Following Just checking in to see what condition our condition is in. she/her
Ola Bini - (@ola@info... @olabini
20K Followers 314 Following Shugyosha. Paranoia principal, privacy developer. Programming language nerd. In a previous life, I was a JRuby core developer and language designer - he/him
Mark Reinhold @mreinhold
34K Followers 888 Following Chief Architect, Java Platform Group, Oracle · Views are my own · 🐘 https://t.co/K7mZtsmCoU
Timothy Hunt @stormguardian
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Alex Tambellini @atambo
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Karol Bucek // k@res @kbucek
253 Followers 369 Following accidental (#oss) programming, seeking (#jvm) asylum (through #jruby), lifelong learning and anarchy
JRubyConf EU @JRubyConfEU
343 Followers 155 Following JRubyConf's European Edition. July/August 2015 in Berlin. Presented as part of @eurucamp 2015.
JRubyConf @JRubyConf
592 Followers 80 Following JRubyConf is back in Europe in 2014. August 1, Potsdam/Berlin, Germany. Come learn how to bring Ruby to the Java platform. Follow @JRubyConfEU for more details
JRubyKaigi @JRubyKaigi
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Nick Sieger [日空] @nicksieger
2K Followers 639 Following Longtime purveyor of artisanal, hand-crafted shell scripts. Yes-and'ing all the ideas. He/him #BlackLivesMatter #GeorgeFloyd #ICantBreathe
Yoko Harada @yokolet
878 Followers 198 Following Polyglot, JVM language lover, Yay JRuby! Yes, ClojureBridge! Full stack web developer, sending love to Machine Learning
あさり 🗣🇯�... @hiro_asari
2K Followers 617 Following Speaks fluent 🇯🇵 🏴, learning 🇪🇸 🇫🇷 Catalan 🇵🇹 🇮🇹 🇩🇪 🇮🇸. He has a finite Erdős number.
Hiroshi Nakamura @nahi
2K Followers 181 Following CTO and VP Engineering at https://t.co/BTxj8KdhCY. OSS enthusiast. Information Security Specialist. Tweets are my own.
Tim Felgentreff @timfelgentreff
500 Followers 311 Following Graal Python implementation lead at Oracle Labs. Opinions are my own.You might like
