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📰 Dev.to · Julien L

9 articles · Updated every 3 hours · View all reads

All Articles 137,177 Blog Posts 141,223 Tech Tutorials 35,577 Research Papers 26,956 News 19,267 ⚡ AI Lessons

Building a Real-Time Recommendation Engine with VelesDB

Dev.to · Julien L 📐 ML Fundamentals ⚡ AI Lesson 3mo ago

Building a Real-Time Recommendation Engine with VelesDB

A visitor lands on the Elden Ring product page. They have never signed up, just browsing. Next to the...

Find duplicate photos on your machine in 0.3ms - no cloud, no GPU

Dev.to · Julien L 👁️ Computer Vision ⚡ AI Lesson 3mo ago

Find duplicate photos on your machine in 0.3ms - no cloud, no GPU

You have 10,000 photos on your laptop. Some are duplicates. Some are resized. Some are cropped...

I built a database in France because the Cloud Act makes EU data sovereignty impossible

Dev.to · Julien L 🔐 Cybersecurity ⚡ AI Lesson 3mo ago

I built a database in France because the Cloud Act makes EU data sovereignty impossible

In January 2025, the US administration fired three members of the Privacy and Civil Liberties...

What if SQL could search by meaning? Meet VelesQL

Dev.to · Julien L 📊 Data Analytics & Business Intelligence ⚡ AI Lesson 3mo ago

What if SQL could search by meaning? Meet VelesQL

VelesQL is a SQL-like query language that does vector search, graph traversal, and full-text ranking in a single query. Here is what it looks like in practice.

Run your AI assistant fully offline: a local-first architecture

Dev.to · Julien L 🤖 AI Agents & Automation ⚡ AI Lesson 3mo ago

Run your AI assistant fully offline: a local-first architecture

What if your AI assistant worked on an airplane? In a hospital? On a classified network? Most AI...

Share memory between AI agents without infrastructure

Dev.to · Julien L 🤖 AI Agents & Automation ⚡ AI Lesson 3mo ago

Share memory between AI agents without infrastructure

Two AI agents need to collaborate. One researches, the other writes. How do they share what they...

One query is never enough: why top RAG systems search three times

Dev.to · Julien L 🔍 RAG & Vector Search ⚡ AI Lesson 4mo ago

One query is never enough: why top RAG systems search three times

LangChain's MultiQueryRetriever and LlamaIndex's SubQuestionEngine exist for a reason. Here's the math behind multi-query fusion - and how to do it in one API c

Stop Using Cosine for Everything: 5 Distance Metrics That Unlock Hidden Powers in Your Vector Database

Dev.to · Julien L ⚡ AI Lesson 4mo ago

Stop Using Cosine for Everything: 5 Distance Metrics That Unlock Hidden Powers in Your Vector Database

Everyone uses cosine similarity. Tutorials use it. Frameworks default to it. If you ask "which...

Give your AI agent a real memory in 50 lines of Python

Dev.to · Julien L 🤖 AI Agents & Automation ⚡ AI Lesson 4mo ago

Give your AI agent a real memory in 50 lines of Python

Your AI agent is brilliant for exactly one conversation. Then it forgets everything. It doesn't...