Alexandre Bertails
@alex.bertails.org
UDA (Unified Data Architecture) and Upper domain model at Netflix. Former , W3C/MIT. Not enough Scala. One Piece nerd.
Pinned
Alexandre Bertails
@alex.bertails.org
· Jun 12
Model Once, Represent Everywhere: UDA (Unified Data Architecture) at Netflix
Introducing UDA, the knowledge-graph-based architecture that translates conceptual domain models into consistent schemas and data…
netflixtechblog.com
This post introduces the foundations of UDA (Unified Data Architecture) as a knowledge graph, connecting domain models to data containers through mappings, and grounded in an in-house metamodel, or model of models, called Upper.
netflixtechblog.com/uda-unified-...
netflixtechblog.com/uda-unified-...
Reposted by Alexandre Bertails
From my friend Kyle. This is essential reading for all Americans. aphyr.com/posts/397-i-...
I Want You to Understand Chicago
aphyr.com
November 8, 2025 at 7:47 PM
From my friend Kyle. This is essential reading for all Americans. aphyr.com/posts/397-i-...
Reposted by Alexandre Bertails
📣 It gives me great pleasure in welcoming @armanbil.ge of #typelevel to #BayAreaScala #meetup with a highly anticipated talk 👉 Calico: my love letter to the Resource monad
For full details of his talk and other speakers can be found here: luma.com/9ww60v3l #scala #fp #SanFrancisco @scala-lang.org
For full details of his talk and other speakers can be found here: luma.com/9ww60v3l #scala #fp #SanFrancisco @scala-lang.org
Calico & the Resource monad, Scripting on the JVM, and Nix Hashbangs · Luma
We have three great talks for this in person event by three great speakers!
Calico: my love letter to the Resource monad
I will share the story of my…
luma.com
November 8, 2025 at 9:05 PM
📣 It gives me great pleasure in welcoming @armanbil.ge of #typelevel to #BayAreaScala #meetup with a highly anticipated talk 👉 Calico: my love letter to the Resource monad
For full details of his talk and other speakers can be found here: luma.com/9ww60v3l #scala #fp #SanFrancisco @scala-lang.org
For full details of his talk and other speakers can be found here: luma.com/9ww60v3l #scala #fp #SanFrancisco @scala-lang.org
Reposted by Alexandre Bertails
At Netflix, @alex.bertails.org and his team have adopted #RDF to build a Unified Data Architecture (UDA) and a #domainModeling language, Upper, that let them quickly and efficiently share complex #data with their internal engineering customers.
knowledgegraphinsights.com/alex-bertails/
knowledgegraphinsights.com/alex-bertails/
Alexandre Bertails: the Netflix Unified Data Architecture
Alexandre Bertails has built at Netflix a Unified Data Architecture and Upper domain modeling language to "Model Once, Represent Everywhere."
knowledgegraphinsights.com
November 4, 2025 at 3:19 PM
At Netflix, @alex.bertails.org and his team have adopted #RDF to build a Unified Data Architecture (UDA) and a #domainModeling language, Upper, that let them quickly and efficiently share complex #data with their internal engineering customers.
knowledgegraphinsights.com/alex-bertails/
knowledgegraphinsights.com/alex-bertails/
Reposted by Alexandre Bertails
Bari Weiss gets the Trump endorsement, the logical endpoint of her fearless independent journalism at the Free Press
I see that CBS chose not to air this part. It probably explains much of what they did decide to air.
November 3, 2025 at 4:33 AM
Bari Weiss gets the Trump endorsement, the logical endpoint of her fearless independent journalism at the Free Press
Reposted by Alexandre Bertails
If you're looking for some rock solid techno-geopolitical analysis, get the good stuff from @leevisaari.bsky.social.
China last month banned companies from purchasing Nvidia’s H20 chips, signaling a breakdown of a corporate strategy designed to navigate complex geostrategic tensions, Leevi Saari writes.
The Rise and Fall of Nvidia’s Geopolitical Strategy | TechPolicy.Press
Nvidia's geopolitical balancing act between the US and China flopped after an arduous lobbying campaign, Leevi Saari writes.
buff.ly
October 11, 2025 at 3:23 PM
If you're looking for some rock solid techno-geopolitical analysis, get the good stuff from @leevisaari.bsky.social.
Reposted by Alexandre Bertails
Proche de Pasqua ⚖️, ministre de Chirac ⚖️, Sarkozy ⚖️ a eu comme premier ministre Fillon ⚖️, comme ministres de l'Intérieur Guéant ⚖️, Hortefeux ⚖️ et Alliot-Marie ⚖️ et pour
amis les Balkany ⚖️. Bref, comme chacun peut le voir ici, le problème, vraiment, c'est Mediapart, hein.
amis les Balkany ⚖️. Bref, comme chacun peut le voir ici, le problème, vraiment, c'est Mediapart, hein.
October 3, 2025 at 8:17 PM
Proche de Pasqua ⚖️, ministre de Chirac ⚖️, Sarkozy ⚖️ a eu comme premier ministre Fillon ⚖️, comme ministres de l'Intérieur Guéant ⚖️, Hortefeux ⚖️ et Alliot-Marie ⚖️ et pour
amis les Balkany ⚖️. Bref, comme chacun peut le voir ici, le problème, vraiment, c'est Mediapart, hein.
amis les Balkany ⚖️. Bref, comme chacun peut le voir ici, le problème, vraiment, c'est Mediapart, hein.
Reposted by Alexandre Bertails
J’étais sur le plateau de BFM où je n’aurais jamais dû aller pour parler de la condamnation de Nicolas Sarkozy.
Je n’ai pas eu le temps de rappeler que la seule chose fausse publiée dans cette affaire c’est la rétractation de Takieddine sur les antennes de… BFM:
m.youtube.com/watch?v=4yYd...
Je n’ai pas eu le temps de rappeler que la seule chose fausse publiée dans cette affaire c’est la rétractation de Takieddine sur les antennes de… BFM:
m.youtube.com/watch?v=4yYd...
Condamnation de Nicolas Sarkozy: l'interview en intégralité de Fabrice Arfi, journaliste à Mediapart
YouTube video by BFMTV
m.youtube.com
September 29, 2025 at 6:41 PM
J’étais sur le plateau de BFM où je n’aurais jamais dû aller pour parler de la condamnation de Nicolas Sarkozy.
Je n’ai pas eu le temps de rappeler que la seule chose fausse publiée dans cette affaire c’est la rétractation de Takieddine sur les antennes de… BFM:
m.youtube.com/watch?v=4yYd...
Je n’ai pas eu le temps de rappeler que la seule chose fausse publiée dans cette affaire c’est la rétractation de Takieddine sur les antennes de… BFM:
m.youtube.com/watch?v=4yYd...
Reposted by Alexandre Bertails
Grab on to Ryunosuke, as Zou heads to Netflix starting October 1st!
September 17, 2025 at 3:17 PM
Grab on to Ryunosuke, as Zou heads to Netflix starting October 1st!
To most data architects, “An ontology is an explicit description of a conceptualization” is about as useful as “A monad is a monoid in the category of endofunctors” is to most programmers.
August 10, 2025 at 6:05 PM
To most data architects, “An ontology is an explicit description of a conceptualization” is about as useful as “A monad is a monoid in the category of endofunctors” is to most programmers.
"REST" is our industry's most successful collective delusion: everyone knows it's wrong, everyone knows we're using it wrong, and somehow that works better than being right.
news.ycombinator.com/item?id=4450...
news.ycombinator.com/item?id=4450...
Most RESTful APIs aren't really RESTful | Hacker News
news.ycombinator.com
July 9, 2025 at 10:29 PM
"REST" is our industry's most successful collective delusion: everyone knows it's wrong, everyone knows we're using it wrong, and somehow that works better than being right.
news.ycombinator.com/item?id=4450...
news.ycombinator.com/item?id=4450...
Reposted by Alexandre Bertails
"It is kind of, in a way, trying to create a second class of U.S. citizens" - for many of us who immigrated here and became citizens, the message is clear.
25 million naturalized citizens now being reviewed for de-naturalization because Trump can't meet his self-imposed quota of removing foreign-born people from U.S. soil
In June a judge ordered the revocation of the citizenship of an American military veteran born in the U.K
Reports @npr.org
In June a judge ordered the revocation of the citizenship of an American military veteran born in the U.K
Reports @npr.org
DOJ announces plans to prioritize cases to revoke citizenship
Denaturalization is a tactic heavily used during the McCarthy era and one that was expanded during the Obama administration and grew further during President Trump's first term. It's a tool usually us...
www.npr.org
July 7, 2025 at 3:26 PM
"It is kind of, in a way, trying to create a second class of U.S. citizens" - for many of us who immigrated here and became citizens, the message is clear.
Reposted by Alexandre Bertails
Small businesses are the backbone of this city! We should do more to make sure that the many great small businesses we have in San Francisco are supported. Let’s make sure that they remain in our community. Thank you Vas Kiniris, for speaking with my team.
July 3, 2025 at 10:57 PM
Small businesses are the backbone of this city! We should do more to make sure that the many great small businesses we have in San Francisco are supported. Let’s make sure that they remain in our community. Thank you Vas Kiniris, for speaking with my team.
Reposted by Alexandre Bertails
AOC: "On this point of tax on tips, as one of the only people in this body who has lived off of tips, I want to tell you a little bit about the scam ... the cap on that is $25,000 while you're jacking up taxes on people who make less than $50,000 across the US ... while kicking them off the ACA."
July 2, 2025 at 3:37 PM
AOC: "On this point of tax on tips, as one of the only people in this body who has lived off of tips, I want to tell you a little bit about the scam ... the cap on that is $25,000 while you're jacking up taxes on people who make less than $50,000 across the US ... while kicking them off the ACA."
Reposted by Alexandre Bertails
I worked at Planned Parenthood.
They diagnose cancers while still treatable. They help women decide what birth control works for them. They help those working through mental health challenges.
Defunding them just harms people who already struggle to find places to get care.
They diagnose cancers while still treatable. They help women decide what birth control works for them. They help those working through mental health challenges.
Defunding them just harms people who already struggle to find places to get care.
June 30, 2025 at 9:31 PM
I worked at Planned Parenthood.
They diagnose cancers while still treatable. They help women decide what birth control works for them. They help those working through mental health challenges.
Defunding them just harms people who already struggle to find places to get care.
They diagnose cancers while still treatable. They help women decide what birth control works for them. They help those working through mental health challenges.
Defunding them just harms people who already struggle to find places to get care.
The piece of code I am the most proud of is called Dupliclef. I wrote it for my dad to be able to save his USB keys and hard-drives. He is old school, but he religiously preserves his data and emails locally by cliquing on the small icon in his Dock. The script then detects the hard drives and keys.
July 1, 2025 at 5:00 AM
The piece of code I am the most proud of is called Dupliclef. I wrote it for my dad to be able to save his USB keys and hard-drives. He is old school, but he religiously preserves his data and emails locally by cliquing on the small icon in his Dock. The script then detects the hard drives and keys.
Reposted by Alexandre Bertails
Chatbots — LLMs — do not know facts and are not designed to be able to accurately answer factual questions. They are designed to find and mimic patterns of words, probabilistically. When they’re “right” it’s because correct things are often written down, so those patterns are frequent. That’s all.
June 19, 2025 at 11:21 AM
Chatbots — LLMs — do not know facts and are not designed to be able to accurately answer factual questions. They are designed to find and mimic patterns of words, probabilistically. When they’re “right” it’s because correct things are often written down, so those patterns are frequent. That’s all.
The same people who tell you that LLMs can reason and manipulate facts will tell you that one cannot prove that a program is correct.
June 19, 2025 at 5:58 PM
The same people who tell you that LLMs can reason and manipulate facts will tell you that one cannot prove that a program is correct.
Reposted by Alexandre Bertails
Allow me to reintroduce myself: my name’s Saikat Chakrabarti and I’m running for Congress against Nancy Pelosi. Here’s a quick campaign update.
June 16, 2025 at 7:01 PM
Allow me to reintroduce myself: my name’s Saikat Chakrabarti and I’m running for Congress against Nancy Pelosi. Here’s a quick campaign update.
This post introduces the foundations of UDA (Unified Data Architecture) as a knowledge graph, connecting domain models to data containers through mappings, and grounded in an in-house metamodel, or model of models, called Upper.
netflixtechblog.com/uda-unified-...
netflixtechblog.com/uda-unified-...
Model Once, Represent Everywhere: UDA (Unified Data Architecture) at Netflix
Introducing UDA, the knowledge-graph-based architecture that translates conceptual domain models into consistent schemas and data…
netflixtechblog.com
June 12, 2025 at 3:07 PM
This post introduces the foundations of UDA (Unified Data Architecture) as a knowledge graph, connecting domain models to data containers through mappings, and grounded in an in-house metamodel, or model of models, called Upper.
netflixtechblog.com/uda-unified-...
netflixtechblog.com/uda-unified-...
We have this super cool new data architecture in Netflix Content and wanted to share it today but we had a technical problem, so the article will only be shared on the Netflix Engineering Blog tomorrow. I hope.🤞
June 12, 2025 at 2:27 AM
We have this super cool new data architecture in Netflix Content and wanted to share it today but we had a technical problem, so the article will only be shared on the Netflix Engineering Blog tomorrow. I hope.🤞
Reposted by Alexandre Bertails
I will be damned if I allow a bunch of Confederate-waving January 6th apologists give the American people a lecture on flag waving.
There is ZERO reason to enter an argument about patriotism with people who still worship traitors to America 150+ years later.
They. Are. Breaking. The. Law.
There is ZERO reason to enter an argument about patriotism with people who still worship traitors to America 150+ years later.
They. Are. Breaking. The. Law.
June 11, 2025 at 1:21 AM
I will be damned if I allow a bunch of Confederate-waving January 6th apologists give the American people a lecture on flag waving.
There is ZERO reason to enter an argument about patriotism with people who still worship traitors to America 150+ years later.
They. Are. Breaking. The. Law.
There is ZERO reason to enter an argument about patriotism with people who still worship traitors to America 150+ years later.
They. Are. Breaking. The. Law.
Reposted by Alexandre Bertails
happy pride Luffy was canonically saved by the queer community and loves queer people from the bottom of his heart
June 1, 2025 at 8:43 AM
happy pride Luffy was canonically saved by the queer community and loves queer people from the bottom of his heart
Reposted by Alexandre Bertails
The top 1% makes about a million dollars a year, probably without working at all — just passive income off assets.
An extra 79k is not even noticeable for them. It’s less than what they pay in fees to asset managers.
But $79k would be life changing to anyone in the bottom 80%.
An extra 79k is not even noticeable for them. It’s less than what they pay in fees to asset managers.
But $79k would be life changing to anyone in the bottom 80%.
May 21, 2025 at 3:36 PM
The top 1% makes about a million dollars a year, probably without working at all — just passive income off assets.
An extra 79k is not even noticeable for them. It’s less than what they pay in fees to asset managers.
But $79k would be life changing to anyone in the bottom 80%.
An extra 79k is not even noticeable for them. It’s less than what they pay in fees to asset managers.
But $79k would be life changing to anyone in the bottom 80%.
Reposted by Alexandre Bertails
New, from me:
The DOGE project was sold as tech disruptors who would revolutionize government. To try to understand why DOGE has failed, I point to lessons that other technologists who worked in government learned, but DOGE ignored. 🧵
donmoynihan.substack.com/p/what-doge-...
The DOGE project was sold as tech disruptors who would revolutionize government. To try to understand why DOGE has failed, I point to lessons that other technologists who worked in government learned, but DOGE ignored. 🧵
donmoynihan.substack.com/p/what-doge-...
What DOGE gets wrong about tech and government
Lessons learned by civic tech, forgotten by DOGE
donmoynihan.substack.com
May 17, 2025 at 2:14 PM
New, from me:
The DOGE project was sold as tech disruptors who would revolutionize government. To try to understand why DOGE has failed, I point to lessons that other technologists who worked in government learned, but DOGE ignored. 🧵
donmoynihan.substack.com/p/what-doge-...
The DOGE project was sold as tech disruptors who would revolutionize government. To try to understand why DOGE has failed, I point to lessons that other technologists who worked in government learned, but DOGE ignored. 🧵
donmoynihan.substack.com/p/what-doge-...
Reposted by Alexandre Bertails
This is what oligarchy is about.
While planning massive cuts to Medicaid, the Republicans are proposing to provide another $235 billion in tax breaks to the top 0.2% of households through an increase in the estate tax exemption.
The very rich get richer. The poor lose health care. Outrageous.
While planning massive cuts to Medicaid, the Republicans are proposing to provide another $235 billion in tax breaks to the top 0.2% of households through an increase in the estate tax exemption.
The very rich get richer. The poor lose health care. Outrageous.
May 10, 2025 at 5:19 PM
This is what oligarchy is about.
While planning massive cuts to Medicaid, the Republicans are proposing to provide another $235 billion in tax breaks to the top 0.2% of households through an increase in the estate tax exemption.
The very rich get richer. The poor lose health care. Outrageous.
While planning massive cuts to Medicaid, the Republicans are proposing to provide another $235 billion in tax breaks to the top 0.2% of households through an increase in the estate tax exemption.
The very rich get richer. The poor lose health care. Outrageous.