Romain Lerallut 💙💛 🌻
@RLerallut
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Former R&D VP, head of @CriteoAILab, RecSys fan. Now on sabbatical. Learn on petabytes, predict in milliseconds.
Joined January 2015
Le marketing digital peut-il être éthique ? Écoutez notre dernier podcast avec @LivaRalaivola, VP Research, @Criteo_France x @CriteoAILab. Un podcast enregistré au @QuaiDesSavoirs dans le cadre de @La_Melee Numérique. A écouter ici : https://t.co/6sjdO3Lady
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My latest @criteo article — The Future of Commerce Recommendation: Why Hybrid Systems Will Win — explores the pros and cons of today’s Performance Recommenders and LLM-based Agents, and how the next generation of RecSys Agents will blend both https://t.co/DPspqU0Unu
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✨ CONSEQUENCES ’25 @ #RecSys2025 was a full house — 200+ attendees! 🚀 Criteo AI Lab had a record number of 5 accepted papers, with @OtmaneSakhi , Alexandre Gilotte & David Rohde presenting our latest work on performance measurement & optimization in RecSys. #Criteo #RecSys2025
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#KernelRecipes 2025 takes place in Paris from Monday! As sponsors, we’re honored to contribute to this vibrant space where deep technical knowledge meets genuine community spirit. Let’s keep building, learning, and sharing. #Linux #OpenSource
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🔴 New tech article published! Have you ever deployed a new version of your app in Kubernetes and noticed errors briefly spiking during rollout? 👀 Check Alik's article about "Importance of Graceful Shutdown in #Kubernetes" @kubernetesio #k8s
https://t.co/9PUhLLUkbo
medium.com
Author: Alik Khilazhev
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The 2025 ACM Conference on Recommender Systems is around the corner. This is your last chance to register for the Standard fee! Join the largest community of recommender system researchers this year in Prague, Czech Republic. Register for #RecSys2025 via the link in the reply👇
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Very insightful read for Kubernetes fanatics! Importance of Graceful Shutdown in Kubernetes by @CriteoEng
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One concept I wish more people were aware of is the Tocqueville Effect. Named for Alexis de Tocqueville, this concept describes the curious phenomenon by which people become more frustrated as problems are resolved: As life gets better, people think it's getting worse!🧵
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The program of this year's RecSys Summer School has been announced! To celebrate, we are briefly reopening applications. So have a look at our program https://t.co/XGxFZkj2Nr and don't delay!
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🚨 France’s 2025 National Strategic Review is out! With 102 mentions of “nuclear” and 43 of “deterrence” over 100 pages, it offers important clarifications on French nuclear doctrine, ongoing adaptations, and threat assessments (amongst other topics). A first look 🧵
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Once again, we participated in @DevoxxFR, an important milestone every year to support the tech community across France. 🇫🇷 Check our contribution with four talks, showcasing our expertise across infrastructure, data engineering, CI/CD, and frontend. https://t.co/ISXfcwKyIb
medium.com
Tech stories from the Criteo R&D team
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Big thanks to the COLT 2025 organizers for an awesome event in Lyon! Here are the slides from my keynote this morning in case you’re curious about the references I mentioned:
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🔴 A new Research Card is out! 🧪 Pareto-Optimality, Smoothness, and Stochasticity in Learning-Augmented One-Max-Search 🔎 A rule for choosing when to sell/buy an asset when facing a sequence of prices. #AdTech Read our article to discover more! 👇 https://t.co/U2VseBWSCC
medium.com
Tech stories from the Criteo R&D team
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Interested in LLMs & RecSys? The CFP is out for #EARL2025, our second workshop on Evaluating and Applying #RecommenderSystems with #LLMs. 📍 Event co-located with #RecSys2025 @ACMRecSys this September in Prague. We warmly welcome your submissions! 🔗 https://t.co/o5r3rpNXbj
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You can just continue pre-train things ✨ Happy to announce the release of BioClinical ModernBERT, a ModernBERT model whose pre-training has been continued on medical data The result: SOTA performance on various medical tasks with long context support and ModernBERT efficiency
Very excited to share the release of BioClinical ModernBERT! Highlights: - biggest and most diverse biomedical and clinical dataset for an encoder - 8192 context - fastest throughput with a variety of inputs - sota results across several tasks - base and large sizes (1/8)
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🔴 A new Research Card is out! 🔴 Check it out to learn more about improving consistency models with generator-augmented flows. This could mean delivering more personalized ads in real-time - boosting engagement and cutting infrastructure costs 🤯 https://t.co/bsaXJ5ZAUu
medium.com
Tech stories from the Criteo R&D team
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Don't miss out on this opportunity: the deadline is tomorrow!
PhD students, this is your final call to participate in the doctoral symposium. It is an excellent opportunity to present your ongoing research & to receive feedback from a group of RecSys experts. More details: https://t.co/3WuZOwAcNm. The deadline is approaching fast: June 3
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🌐 From Matching to Reasoning — Retrieval just grew a brain. LightOn introduces Reason-ModernColBERT, a State-of-the-Art multi-vector model purpose-built for the era of Deep Research — where matching isn’t enough, and true insight demands reasoning. Built on #ModernBERT and
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Friendly reminder to get working on those industry submissions! 😈 Deadline May 15! More details 👉 https://t.co/4H98VmC5PQ
#RecSys2025
recsys.acm.org
Call for Contributions Instructions for preparing camera-ready versions of accepted papers can be found here.
#RecSys2025 will once again boast an impressive industry program -- that is, if you 🫵 submit your latest and greatest case studies, lessons learned, real-world observations, and more. We're counting on you! 😍 Find out more 👉 https://t.co/4H98VmCDFo
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