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Ciaran Lee
Fin
6,872 posts
user avatar
Ciaran Lee
Fin
@ciaran_lee
Co-founded @fin_ai (formerly @intercom)
Dublin, Ireland
fin.ai
Joined March 2007
2,235
Following
4,920
Followers
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Aug 21, 2025
    I normally hate overengineering, but can't stop myself from doing it to my home network
    1.6M
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Jul 19, 2021
    Last Friday was my final day at @intercom, the company I cofounded 10 years ago along with @eoghan @destraynor and @davebarrett. It has been such a privilege to have been part of the adventure for so long!
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Feb 24, 2024
    Had to try it myself. So fascinating!
    user avatar
    Marc Andreessen 🇺🇸
    a16z
    @pmarca
    Feb 24, 2024
    It really is incredible.
    190K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Feb 24, 2024
    Replying to @ciaran_lee
    If fire was discovered today, a load of tech industry midwits would try to ban it
    17K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Feb 1, 2025
    It'd be so to funny to build the opposing version of bots like this and roll them out with the same self congratulatory fanfare as when they were initially deployed
    user avatar
    Marc Andreessen 🇺🇸
    a16z
    @pmarca
    Feb 1, 2025
    The federal government's Inclusion Bot now lives in bot heaven with Tay. 🥺 18f.gsa.gov/2016/01/12/hac…
    194K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Aug 22, 2025
    Replying to @ryanvogel
    GIF
    31K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Dec 18, 2024
    Replying to @willob
    We did a tour of poolbeg coal plant when I was a kid. The scale was insane. I did appreciate it a bit but spent most of the tour laughing because a teacher said he "would be bringing it up the rear" of the group during the kick-off meeting.
    14K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Sep 12, 2023
    As people seem interested here are some more fun numbers from our @rails app: - we deployed the app 46 times today (well, 46 PRs merged but some shipments likely ended up being deployed together) - test runs take 5 mins (at a concurrency of 500) - we max out just over 1M SQL
    user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Sep 12, 2023
    Replying to @fractaledmind and @julian_rubisch
    Rails is scaling quite nicely for us. I'm an even bigger fan of vanilla rails stack now than when we started in 2011.
    45K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Mar 22, 2023
    Very excited to share that I am returning to @intercom, for one last mission! I will be working with an amazing team to help improve our customer billing experience.
    GIF
    62K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Jan 20, 2023
    💥 ruby 3 -> 3.2 dropped test time for my rails app from 44s to 25s
    12K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    May 8, 2025
    Rails still chugging along very nicely for us
    user avatar
    Brian Scanlan
    @brian_scanlan
    May 8, 2025
    Random data dump - Intercom now does 150k RPS HTTPS requests and 50k async worker requests at daily peak. Also 1 million RPS on PlanetScale!
    10K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Dec 29, 2024
    These photos are from my suburb + city As a kid, antisemitism here was overt - “Jew” was an insult among kids + adults made cruel jokes at their expense Now it’s typically cloaked in caring language by people who consider themselves humanitarians, but oppose a Jewish state
    user avatar
    Rachel Moiselle
    @RachelMoiselle
    Dec 29, 2024
    Hello, all. Heartbreaking update. The photo on the left was taken by me on the East Pier in Dún Laoghaire a few minutes ago. It says ‘Zionists not welcome in Dún Laoghaire’. I grew up in Dún Laoghaire. It is my beloved hometown. I have walked and run down this pier thousands
    Photo of graffiti in Ireland: ‘Zionists not welcome in Dún Laoghaire.
    Photo of my grandfather’s old gramophone. It has antisemitic graffiti outside it.
    11K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Aug 21, 2025
    Replying to @nateberkopec
    😂😂😂 Yes
    52K
  • user avatar
    Ciaran Lee
    Fin
    @ciaran_lee
    Sep 12, 2023
    Replying to @fractaledmind and @julian_rubisch
    Rails is scaling quite nicely for us. I'm an even bigger fan of vanilla rails stack now than when we started in 2011.
    49K

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