Tobias Haar (@tobscher) profile picture

Tobias Haar

@tobscher

👨🏻‍💻 Software Engineer 💎 Ruby enthusiast 🌍 Language learner 🎹 Beginner piano player

 🇬🇧 United Kingdom
tobiashaar.com
Joined November 2025
  • Tweets73
  • Following132
  • Followers35
4Media
Photo by Tobias Haar (@tobscher)Photo by Tobias Haar (@tobscher)Photo by Tobias Haar (@tobscher)Photo by Tobias Haar (@tobscher)
Tobias Haar retweeted
Lewis Buckley (@lewispb) profile picture
Lewis Buckley@lewispbSep 25
We are organizing a UK ruby/rails/ai conference next year in Bristol. A* speakers. Interested?
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Finally back home in Newcastle. Thank you for a great time #rubyfriends #rubykaigi
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Bye bye 函館! It’s been incredible #rubykaigi
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Tobias Haar retweeted
Stan Lo (@_st0012) profile picture
Stan Lo
@_st0012Apr 24
And the 1/3 includes Matz!
David Stosik (@davidstosik) profile pictureDavid Stosik@davidstosikApr 24
About 1/3 of the Ruby committers use AI to write at least half of the code they produce. About 3/4 of the #RubyKaigi attendees do the same.
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Tobias Haar retweeted
RubyKaigi (@rubykaigi) profile picture
RubyKaigi@rubykaigiApr 24
RubyKaigi 2027 #rubykaigi 🗓️ 14..16 Apr 2027 🥭 Miyazaki, Japan
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Tobias Haar retweeted
Samuel Williams (@ioquatix) profile picture
Samuel Williams@ioquatixApr 24
It’s happening - compiled Ruby github.com/matz/spinel #rubykaigi #rubykaigiA
GitHub - matz/spinel: Ruby AOT compiler

GitHub - matz/spinel: Ruby AOT compiler

Ruby AOT compiler. Contribute to matz/spinel development by creating an account on GitHub.

github.com
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Tobias Haar retweeted
Nate Berkopec (@nateberkopec) profile picture
Nate Berkopec
@nateberkopecApr 24
Matz Uses AI So We Use AI
Stan Lo (@_st0012) profile pictureStan Lo
@_st0012Apr 24
And the 1/3 includes Matz!
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Tobias Haar retweeted
えむ。 (@takkanm) profile picture
えむ。@takkanmApr 23
Thank you for comming today's our drink up, Treasure Data: Hakodate Night Drinkup on Tram 🍻See you tomorrow!!! #rubykaigi
Image from えむ。 (@takkanm)
Image from えむ。 (@takkanm)
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On the tram getting to the #rubykaigi venue. So excited! See you there.
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Our flight to Hakodate was cancelled. Implementing plan B with @yukideluxe #rubykaigi
Image from Tobias Haar (@tobscher)
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Any other Rubyists stuck at Haneda airport? Do you want to catch up while we are waiting? #rubykaigi
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Oh no... #rubykaigi
Image from Tobias Haar (@tobscher)
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Tobias Haar retweeted
kinoppyd (@GhostBrain) profile picture
kinoppyd@GhostBrainApr 17
To all #rubykaigi participants: Use the schedule app to ensure you have the best three days ever! 🚀 Get ready and see you at the venue!
SmartHR Developers (@smarthr_dev) profile pictureSmartHR Developers@smarthr_devApr 17
The official scheduler app "Schedule select" is back for #rubykaigi 2026! 🚀 Plan your sessions, connect with friends, and enjoy the ultimate RubyKaigi experience. Provided by SmartHR. #rubykaigi tech.smarthr.jp/entry/2026/0…
Get ready for RubyKaigi with Schedule.select! - SmartHR Tech Blog

Get ready for RubyKaigi with Schedule.select! - SmartHR Tech Blog

Note: This blog post is an English translation of last year’s introduction article, with some additional updates and revisions. Hi there! I’m kinoppyd, the deve…

tech.smarthr.jp
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On my way now to #rubykaigi Long trip from Newcastle to Hakodate! Looking forward to catching up with some old friends and to make some new ones! Let me know if you want to chat.
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Tobias Haar retweeted
ima1zumi (@ima1zumi) profile picture
ima1zumi@ima1zumiApr 13
DJ 2です。はじめてのDJなのでドキドキですが楽しく流そうと思います。よろしくお願いします。Doorkeeperでの事前登録必須なのでお忘れなく。#rubykaigi #rubyilluminations xitter.cf/pixiv_corp/status/2043…
Image from ima1zumi (@ima1zumi)
ピクシブ株式会社 pixiv Inc. (@pixiv_corp) profile pictureピクシブ株式会社 pixiv Inc.
@pixiv_corpApr 13
RubyKaigi 2026併催 「RubyIlluminations」参加受付中📢 《受付ページ》 pixiv.doorkeeper.jp/events/1… ※RubyKaigi参加パスのみでは入れません Rubyの光・音・映像を 函館でぜひ体感してください🎶 日時🗓 4/24 (金) 19:00開場 会場🌃BLUE POINT (函館) #rubykaigi #rubyilluminations
pixiv presents RubyIlluminations 2026

pixiv presents RubyIlluminations 2026

2026-04-24（金）19:00 - 2026-04-25（土）01:30 pixiv presents Ruby Illuminations 2026 日本語版はこの下にあります。 What is RubyIlluminations 2026? In previous years, pixiv has hosted "RubyMusicMixin," a space wher...

pixiv.doorkeeper.jp
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Tobias Haar retweeted
RubyKaigi (@rubykaigi) profile picture
RubyKaigi@rubykaigiApr 10
RubyKaigi 2026 is now officially sold out. No additional tickets will be available to purchase. See you in Hakodate! #rubykaigi
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#RubyKaigi 2026 Day0 に開催する「J.LEAGUE Supporters.rb 百年構想リーグ」申し込みアンケートの現状の内訳をグラフにしてみました。参考にしてください。まだまだ枠あります！ ！ connpass.com/event/388335/ #jleaguerb
Image from マジカルペンネくん🍝 (@pastak)
Image from マジカルペンネくん🍝 (@pastak)
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Tobias Haar retweeted
RubyKaigi (@rubykaigi) profile picture
RubyKaigi@rubykaigiMar 27
RubyKaigi 2026 Social events line-up is live. We expect more events to come, and most events start registration on 6 Apr or later. rubykaigi.org/2026/events/ #rubykaigi
Events

Events

rubykaigi.org
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Tobias Haar retweeted
RubyKaigi (@rubykaigi) profile picture
RubyKaigi@rubykaigiMar 21
RubyKaigi 2026 schedule is out!🌟 rubykaigi.org/2026/schedule/ #rubykaigi
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Tobias Haar retweeted
Yusuke Endoh (@mametter) profile picture
Yusuke Endoh@mametterMar 5
I benchmarked which language works best with Claude Code. Ruby, Python, and JavaScript came out cheapest, fastest, and most stable! See my article in detail: dev.to/mame/which-programmin…
Image from Yusuke Endoh (@mametter)
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