Ciaran Lee — e/acc Profile Banner
Ciaran Lee — e/acc Profile
Ciaran Lee — e/acc

@ciaran_lee

3,872
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1,214
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technology brother, co-founded @intercom

Dublin, Ireland
Joined March 2007
Don't wanna be here? Send us removal request.
@ciaran_lee
Ciaran Lee — e/acc
3 years
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!
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@ciaran_lee
Ciaran Lee — e/acc
5 months
Had to try it myself. So fascinating!
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@pmarca
Marc Andreessen 🇺🇸
5 months
It really is incredible.
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@ciaran_lee
Ciaran Lee — e/acc
5 months
If fire was discovered today, a load of tech industry midwits would try to ban it
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@ciaran_lee
Ciaran Lee — e/acc
10 months
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
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@ciaran_lee
Ciaran Lee — e/acc
10 months
@fractaledmind @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.
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@ciaran_lee
Ciaran Lee — e/acc
1 year
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.
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@ciaran_lee
Ciaran Lee — e/acc
1 year
💥 ruby 3 -> 3.2 dropped test time for my rails app from 44s to 25s
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@ciaran_lee
Ciaran Lee — e/acc
10 months
@fractaledmind @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.
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@ciaran_lee
Ciaran Lee — e/acc
2 years
Great post by @jorgemanru . I love vanilla rails + almost always ended up regretting straying away from it.
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@ciaran_lee
Ciaran Lee — e/acc
1 year
@UpdatingOnRome Thirteen ❤️😢
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@ciaran_lee
Ciaran Lee — e/acc
2 years
I find this quite a fun way to work from home. Fire up flight sim, take off then stick it on autopilot. Hack while listening to ATC chatter and keeping an eye on it, then jump back on again to land a couple hours later. Currently flying a Citation Longitude from Dublin to Sion :)
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@ciaran_lee
Ciaran Lee — e/acc
3 years
@intercom @eoghan @destraynor @davebarrett I can't write a short series of tweets that do justice to the amazing adventure I've had, and the very special company that is continuing to do amazing things. Luckily I spoke with @TomLyonsBiz last week and he wrote a fantastic piece about it here: ❤️🚀
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@ciaran_lee
Ciaran Lee — e/acc
10 months
Love this piece on @eoghan 's rollercoaster journey + recent return to @intercom . The level of ambition and risk appetite that he brings is intoxicating + led to my own return a few months later.
@thecurrency
The Currency
10 months
Restarting the start-up: Why Eoghan McCabe returned to lead Intercom
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@ciaran_lee
Ciaran Lee — e/acc
2 years
The minimal code delta to make a rails app realtime. 🤩
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@ciaran_lee
Ciaran Lee — e/acc
5 months
Did a business metrics review from my bike yesterday. Was quite nice just cranking at low watts. In a way it felt easier to concentrate - zero email or slack distractions. I was so happy with it, and thinking nobody would notice, I took a selfie.
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@ciaran_lee
Ciaran Lee — e/acc
10 months
My favorite kind of Saturday night ☺️
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@ciaran_lee
Ciaran Lee — e/acc
11 months
Just got a random call from my 8 year old daughter while at work. Quite delightful. Made me appreciate that my parents probably also like it when I call them. Never really thought of that before
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@ciaran_lee
Ciaran Lee — e/acc
8 months
Few things make me feel more alive than a showstopper bug immediately before launch date
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@ciaran_lee
Ciaran Lee — e/acc
4 years
What an adventure we've had! I feel a confusing cocktail of emotions: grateful, sad, excited, and most of all ❤️
@eoghan
Eoghan McCabe
4 years
Some personal news! On July 1 I’ll move to the Chairman role at @intercom and @karenpeacock will become our new CEO! Here’s my mail to the company. ❤️❤️❤️
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@ciaran_lee
Ciaran Lee — e/acc
4 years
Realised today that we need new internet for our house. Trigger point was our 3 year old telling my wife she's fired because Netflix wasn't working 😂
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@ciaran_lee
Ciaran Lee — e/acc
1 year
When I was a kid studying Engineering, hearing @sos100 talk about his entrepreneurial adventures really got me excited and changed how I thought about my career. So it was fun for me to share some details of my own adventures with first year @tcdengineering students:
@tcdengineering
Trinity Engineering
1 year
🎙️ 🎉Tune in to an incredible guest lecture by @ciaran_lee , co-founder of @intercom . 🎧 Join @tcddublin 's Junior Fresh class of Engineering Undergraduates as they delve into Ciarán's inspiring journey. Listen here: @tcdalumni
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@ciaran_lee
Ciaran Lee — e/acc
9 months
AI tools getting scary accurate. Check out this one of me spending a day fixing my own stupid bug.
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@ciaran_lee
Ciaran Lee — e/acc
3 months
I also made this mistake. Pointless + time consuming exercise that didn't improve anything for anybody, but signalled a willingness to cave to the smallest of demands
@dhh
DHH
3 months
"Changing master to main changed less than nothing. Because nothing was or is ever enough in this arena. As soon as this word battle was won, it was just on to the next and the next (and the next)."
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@ciaran_lee
Ciaran Lee — e/acc
6 years
Ireland is a kinder place today than it was yesterday. I'm amazed at how quickly it is changing 😍
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@ciaran_lee
Ciaran Lee — e/acc
2 years
It's so fun rediscovering how to effectively work on an entirely new piece of software, after many years working on a large app. Some of the practices that made sense at @intercom scale (of codebase, throughput, team size) don't apply at all, others do.
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@ciaran_lee
Ciaran Lee — e/acc
1 year
Pretty scary experience this morning. My up until now amazing @canyon_bikes frame spontaneously cracked and lost integrity while cycling 😬
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@ciaran_lee
Ciaran Lee — e/acc
1 year
Does anyone else replace "surveillance capitalism", "late stage capitalism",  "capitalist hellscape" etc with "by far the best time to exist in human history" when reading?
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@ciaran_lee
Ciaran Lee — e/acc
25 days
Occasionally I encounter a tool so blatantly customer hostile that it's actually impressive. Our expense management tool can't reliably scan receipts or provide nice simple workflows for filling expenses that take less than 10 mins. But it can do shady growth hacks like: 1)
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@ciaran_lee
Ciaran Lee — e/acc
9 months
Shocked at how many people overlook or excuse the most evil acts imaginable, against innocents, when those acts are perpetrated by alleged "freedom fighters". Have been struggling to reconcile this for days. 🇮🇱❤️
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@ciaran_lee
Ciaran Lee — e/acc
2 years
I forgot how satisfying it can be to hack on a feature all week and then ship it on a Friday evening :)
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@ciaran_lee
Ciaran Lee — e/acc
7 years
What an adventure it has been! A fun update on our progress over the past 5 years, incl. revenue + growth numbers:
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@ciaran_lee
Ciaran Lee — e/acc
1 year
Watched this trailer 5 times already. Pumped
@SonyPictures
Sony Pictures
1 year
He came from nothing. He conquered everything. From acclaimed director Ridley Scott, @NapoleonMovie is exclusively in movie theaters this Thanksgiving. Watch the official trailer now.
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@ciaran_lee
Ciaran Lee — e/acc
7 months
Modern supply chains are so amazing! Ordered an engraved ipad yesterday, with an engraved pencil. Arrived less than 24 hours later 🤯
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@ciaran_lee
Ciaran Lee — e/acc
6 years
I'm humbled by the number of smart, kind, ambitious people who have chosen to join us @intercom . Super excited that we're doubling the size of our product team (eng, design, PM, research and analytics) across Dublin, London, SF over the next 18 months:
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@ciaran_lee
Ciaran Lee — e/acc
4 years
@cmdkhalilov Intercom monolith still going strong! IMO more likely that in future we’ll fold some existing services back in to it rather than start splitting it up.
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@ciaran_lee
Ciaran Lee — e/acc
6 months
The aggregate amount of value delivered, people inspired, and companies created over 20 years because of Basecamp is 🤯
@37signals
37signals
6 months
Happy 20th Birthday, Basecamp!
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@ciaran_lee
Ciaran Lee — e/acc
1 year
@stevepcarroll I hired Ben when he was 17 as a software eng solely because he was a total freak in terms of ability and ambition. He's had a a rocket ship career ever since, purely driven by himself. Maybe he has a different perspective to you, and that's ok, and there's no need to be rude?
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@ciaran_lee
Ciaran Lee — e/acc
4 years
Looks like @github disapproves of my language :)
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@ciaran_lee
Ciaran Lee — e/acc
22 days
Spotted in Monkstown. I quite like it!
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@ciaran_lee
Ciaran Lee — e/acc
1 year
I concluded a while ago that society as a whole simply doesn't want to solve the housing crisis. Most people and organisations say they do, but always with their own little clauses and qualifications. They can't accept development outside that. A perfect example from today:
@IrishTimes
The Irish Times
1 year
Planners refuse 98 homes in Greystones because town has ‘already hit population target’
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@ciaran_lee
Ciaran Lee — e/acc
2 years
Not a new observation, but ChatGPT is really amazing, and it's grasp of complex topics and their individual parts is astonishing, as well as it's ability to adapt and refine when given feedback. Check this out:
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@ciaran_lee
Ciaran Lee — e/acc
2 years
This afternoon I discovered that my Ballmer Peak is under 2x440ml cans
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@ciaran_lee
Ciaran Lee — e/acc
6 years
What an amazing journey it has been so far. Really excited about what we're gonna do for our customers over the next year!
@intercom
Intercom
6 years
We just raised $125M. Here’s what we’re going to do with it for you, our customers.
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@ciaran_lee
Ciaran Lee — e/acc
9 years
So proud of everyone involved in #intercomonproduct but particularly so of @darraghcurran and @MeganLSheridan http://t.co/zA2s1p8eLE
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@ciaran_lee
Ciaran Lee — e/acc
1 year
I can’t wait to get one!
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@ciaran_lee
Ciaran Lee — e/acc
6 months
I've probably watched this a hundred times
@historyinmemes
Historic Vids
6 months
Arsenal legend lan Wright reuniting with his old school teacher in 2005 will forever be heartwarming
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@ciaran_lee
Ciaran Lee — e/acc
1 year
Fun seeing little pieces of history like this in an old codebase :)
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@ciaran_lee
Ciaran Lee — e/acc
3 months
@KarlBrophy @AerLingus @JetBlue Amazing! I also have Concierge but find it useless to the point where it feels cynically designed to prevent me from taking advantage of the supposed benefits. Aer Lingus business prices are terrible and the service has gotten a _lot_ worse over the past 5 years
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@ciaran_lee
Ciaran Lee — e/acc
8 months
Action shot of me figuring out how to use @amoamoamo
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@ciaran_lee
Ciaran Lee — e/acc
9 years
Really excited that we raised a $35M Series C from ICONIQ, Bessemer, and Social + Capital!
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@ciaran_lee
Ciaran Lee — e/acc
1 year
Very cool new option for ambitious people who aspire to create something, but might not be sure about what, how, or with who to do it:
@dogpatchlabs
Dogpatch Labs
1 year
📢 Announcing #Founders - Ireland’s first talent accelerator We’re bringing together the most talented engineers, domain experts and commercial minds to 🤝Find a co-founder 🚀Build the next generation of tech startups 💸Pitch for €100K investment Apply:
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@ciaran_lee
Ciaran Lee — e/acc
4 years
@cmdkhalilov Rough scale of the monolith at daily peak: 30k requests/s, 30k jobs/s, 500k SELECTs/s, 500k+ cache reads/s
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@ciaran_lee
Ciaran Lee — e/acc
1 year
Decent code review!
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@ciaran_lee
Ciaran Lee — e/acc
2 years
5G seems cool
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@ciaran_lee
Ciaran Lee — e/acc
4 months
DHH and Jason are such heroes. They went out early on this stuff and got whacked for it. Must have been super stressful. Of course it paid off beautifully and now they look like geniuses
@dhh
DHH
4 months
"But I can totally see how they got there. How Sergei and Larry could feels like it's too late, too hard, too painful to deal with the cultural capitulation. Because that's almost how Jason and I felt at times prior to April 2021."
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@ciaran_lee
Ciaran Lee — e/acc
2 years
I love this. Big fan of making decisions quickly to unlock progress rather than analysis paralysis
@NeckarValue
Frederik Christopher Gieschen
2 years
Momentum and mistakes: ‘If you can’t tell me the four ways you f*cked something up… you probably weren’t the person who worked on it’ @elonmusk via @jimmyasoni
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@ciaran_lee
Ciaran Lee — e/acc
12 years
I made a simple front end web app for the Residential Property Price Register: http://t.co/99diaHuK
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@ciaran_lee
Ciaran Lee — e/acc
2 years
Fun piece by @FusorFusion about the early stages of Intercom here: Wish I'd looked at the camera more, and said uh and like less 😅
@pioneerdotapp
Pioneer
2 years
“Dude, if we nail this, this could be a $10 million company!” This is the story of how @intercom became a $1.6B company 👇 Before Intercom, @destraynor , @eoghan , @ciaran_lee and @davebarrett built web apps for non-technical founders.
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@ciaran_lee
Ciaran Lee — e/acc
8 months
Really enjoyed this! Could listen to Des all day
@destraynor
Des Traynor
8 months
My podcast with @HarryStebbings on 20VC is live, I'll share some snippets, and link at the end. First my answer to "Why is most marketing speak so forgettable and meh"
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@ciaran_lee
Ciaran Lee — e/acc
8 months
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@ciaran_lee
Ciaran Lee — e/acc
6 months
Love this. Big fan of simple core technologies and avoiding intellectual masturbation. The king is on fire recently.
@dhh
DHH
6 months
"Programmers are attracted to complexity like moths to a flame. The more convoluted the systems diagram, the greater the intellectual masturbation. Our commitment to resisting that is the key ingredient in this uptime success."
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@ciaran_lee
Ciaran Lee — e/acc
5 months
Really enjoyed this piece by @mark_cummins on where things might go from here:
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@ciaran_lee
Ciaran Lee — e/acc
2 years
Starlink is so impressive 🤯. Total game changer when in the middle of nowhere
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@ciaran_lee
Ciaran Lee — e/acc
7 years
I'm heartbroken that the world's greatest nation is instituting such hateful and counter productive policies...
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@ciaran_lee
Ciaran Lee — e/acc
6 years
I love this post by @brandur "Only by concertedly building a minimal stack that’s stable and nearly perfectly operable can we maximize our ability to push forward with new products and ideas" 😍
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@ciaran_lee
Ciaran Lee — e/acc
8 months
I love this! 🚀
@benmcredmond
Ben McRedmond
8 months
Everyone talks about the need to ship fast in startups, but how do you actually do it? Here are my 8 principles honed over 12 years of building software:
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@ciaran_lee
Ciaran Lee — e/acc
10 years
Great analysis of SAAS valuations by @heyanshul : http://t.co/6jNpvSEysU
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@ciaran_lee
Ciaran Lee — e/acc
5 months
I need to watch this more regularly. It's so great. If you can apply this process when building rockets and cars, you can apply it to a SaaS company. Thanks to mr. @darraghcurran for the reminder.
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@ciaran_lee
Ciaran Lee — e/acc
27 days
@brianmlucey This is how you can tell that the greens (and others) are not that concerned about actually decarbonizing our grid
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@ciaran_lee
Ciaran Lee — e/acc
5 months
Battle hardening never really stops I guess. In addition to checks for primary key space, I now also recommend checking for all references to those primary keys.
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@ciaran_lee
Ciaran Lee — e/acc
1 month
@ianmakgill @philreynolds @arvidkahl Big benefits imo from splitting this out when the writing is on the wall. You can scale and optimise (perf and features) each layer independently
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@ciaran_lee
Ciaran Lee — e/acc
2 years
Out of all the amazing people I had the privilege of working with with, @rich_archbold is one of the very best. Superior to me in _many_ ways - kinder, better organised, a more scaleable manager. He was a critical figure in our growth. I envy whoever gets to hire him.
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@ciaran_lee
Ciaran Lee — e/acc
1 month
I can't wait to watch this!
@eoghan
Eoghan McCabe
1 month
Episode 3 of Off Script goes live on Thursday. This will be a good one. @fergal_reid , head of AI at @intercom , will go deep on the technology behind the rapidly evolving AI customer service category that we've been pioneering. I'll share it here on X.
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@ciaran_lee
Ciaran Lee — e/acc
6 months
This is astonishing 🤯
@bobbypinero
Bobby Pinero
6 months
New AI Assist in @heyequals today. Watch it: 1) Write and edit a sql query 2) Extract insights from a data set 3) Recommend analysis 4) Proactively fix a query and formula 4) Explain to me how to build a dashboard 5) Build a v1 dashboard All in 3 min 🎥
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@ciaran_lee
Ciaran Lee — e/acc
10 months
Not sure if the image generator in bing chat is dalle-3 yet, but whatever it is it's amazing! Check these logos my 6 year old asked for, the proposed company name is "rainbow sparkle unicorn":
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@ciaran_lee
Ciaran Lee — e/acc
3 years
Wow great job Liam! Some really fun memories in here from Intercom's first 10 years. Very excited to see what happens in the next 10!
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@ciaran_lee
Ciaran Lee — e/acc
1 year
This is _far_ from the worst word I've seen Gboard make a mistake with. In this case I was trying to type "GitHub"
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@ciaran_lee
Ciaran Lee — e/acc
1 year
I approve this message
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@ciaran_lee
Ciaran Lee — e/acc
6 months
The trajectory here is exciting! Feels like the next few years might see a big improvement in what's possible for a single engineer to build, then run on a single server
@dhh
DHH
6 months
So we were testing out ONCE #1 on a big AWS instance and hitting 30,000 concurrent users on our metrics. Pretty cool to see that using sqlite! Can't wait to see what we can do with our new gen 5 SSD boxes. Sqlite can go very far these days.
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@ciaran_lee
Ciaran Lee — e/acc
1 month
I've been up for 45 mins. Phone battery already down 18%. In hindsight running this beta was a mistake
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@ciaran_lee
Ciaran Lee — e/acc
6 months
@dhh It's also a total pain in the ass to have to build for scale. A real haircut on speed of building and sometimes on richness of experience too. Not having to do it is a luxury and an advantage!
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@ciaran_lee
Ciaran Lee — e/acc
11 months
We desperately need to start making actual progress against our housing problem. That will require change. Here's a good idea that has worked elsewhere:
@BPAIreland
Better Planning Alliance
11 months
Ireland has one of the worst housing crises in the world. Existing attempts to fix it have failed, and we need new ideas. One big opportunity is letting communities choose to allow more homes through street plans. 🧵 1/n
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@ciaran_lee
Ciaran Lee — e/acc
6 years
Can't wait to see what people create with this!
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@ciaran_lee
Ciaran Lee — e/acc
4 years
Really proud of the folks who shipped this! 🙌
@intercom
Intercom
4 years
🆕 We're SO excited to let our lips loose and finally announce that the world’s best chatbot just got better. Meet Resolution Bot 🤖 Why you need it: 🤔 Automatically answers 1/3 of common Qs 💸 Lowers support costs 📈 Helps your support team scale
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@ciaran_lee
Ciaran Lee — e/acc
8 years
I'm really proud of all the wonderful folks who worked on Educate, which we launched today ❤️
@intercom
Intercom
8 years
🆕 We launched a brand new product, Educate. It’s what a knowledge base should be. Personal and intelligent.
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@ciaran_lee
Ciaran Lee — e/acc
2 months
💯 The degree to which a hand was on the scale in the past is now so tangible
@eoghan
Eoghan McCabe
2 months
I suspect we may still be underestimating the impact on culture and society that @elonmusk buying Twitter has had and will have.
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@ciaran_lee
Ciaran Lee — e/acc
6 months
Can't wait for this! I've been really enjoying reading the source and deploying the campfire app. Having been out of front end engineering for the past 8 years or so, I'm delighted with where things seem to be ending up :)
@dhh
DHH
6 months
Looking forward to doing some long code walks with customers on all the nitty gritty of the ONCE/Campfire source choices. Not just how, but why. Hopefully we'll be ready to open sales for all this week. If not, then next at the latest (FAMOUS LAST WORDS!).
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@ciaran_lee
Ciaran Lee — e/acc
7 years
We wrote a book about what we've learned building Intercom over the past 6 years!
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@ciaran_lee
Ciaran Lee — e/acc
6 months
After a week with the M3 Pro, I now physically recoil when forced to look at a screen that refreshes less than 120 times per second.
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@ciaran_lee
Ciaran Lee — e/acc
3 years
@Whelton @destraynor I'm gonna start using that!
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@ciaran_lee
Ciaran Lee — e/acc
3 months
I wonder how much of the world's software doesn't need the fault tolerance and supposed arbitrary scalability of modern cloud platforms, but instead sits in a sweet spot where the simplicity, speed, and decent scale possible with a single server is enough
@ashleyrudland
Ashley Rudland 🦍
3 months
On Hetzner, €3.29/mo VPS, it's 14,000 writes/sec 🤣🤣🤣 Okay serverless might be dead hahaha @ImSh4yy try it yourself 👉
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