Julien Jakubowski
@jaku.dev
Staff Engineer, Developer Advocate. @chtijug.org founder. Java, Software Engineering, CI/CD, DORA, Software Craft, Distributed Systems, Data Streaming, Kafka, Apache Pulsar
Lots of practical insights here on MCP tool design - from tool granularity and naming to descriptions, parameters, and error handling. Worth a read if you’re building MCP servers 👇 ro14nd.de/mcp-tool-des...
Your API Is Not Your MCP Tool
How to design MCP tools that agents actually use well. Tool count, parameter naming, enums over booleans, context hygiene, and what the 2026-07-28 spec changes for tool definitions.
ro14nd.de
I'm sharing one of the best resources I’ve come across recently about AI-augmented development: lexler.github.io/augmented-co... It’s a catalog of good and bad AI-augmented development patterns, and how they relate to each other.
Augmented Coding Patterns
A collection of emerging patterns, anti-patterns, and obstacles for effective AI-augmented software development
lexler.github.io
I've just signed the AI-Driven Development Manifesto: 'As AI-Driven Developers, we are discovering better ways of building software by working with AI as a deliberate partner — and helping others do the same.' www.ai-driven-development.org
The Manifesto for AI-Driven Development
Four values and twelve principles for developers who build software with AI as a deliberate partner.
ai-driven-development.org
Salut everybody tout le monde 👋 Le CFP de Cloud Nord 2026 a ouvert ce matin ! On attend avec impatience vos propositions ! C'est dispo par ici : conference-hall.io/cloud-nord-2...
Cloud Nord 2026 call for papers
Submit your proposal to Cloud Nord 2026 call for papers.
conference-hall.io
Short and very clear video on why Kafka is not a replacement for “MQs” (RabbitMQ, ActiveMQ…) and how to choose between them: www.youtube.com/watch?v=1HOV... Must watch! Reminds me of Apache Pulsar that can do both messaging (MQ) and streaming (Kafka) on the same broker & same topics.
Kafka vs RabbitMQ
YouTube video by Hello Interview - SWE Interview Preparation
youtube.com
Créer un Chatbot Intelligent avec LangChain4j avec @agoncal.bsky.social à Lille le 20 janvier au @chtijug.org meetu.ps/e/PM5qd/1Dwh...
Créer un Chatbot Intelligent avec LangChain4j, Tue, Jan 20, 2026, 6:45 PM | Meetup
Bonjour tout le monde ! Nous vous souhaitons une très bonne année 2026! Nous sommes très heureux de vous annoncer la prochaine session du Ch'ti JUG. Cette session aura li
meetu.ps
I just completed "Secret Entrance" - Day 1 - Advent of Code 2025 #AdventOfCode adventofcode.com/2025/day/1
Day 1 - Advent of Code 2025
adventofcode.com
Session immanquable au Ch'ti JUG avec José Paumard : De Java 21 à Java 25 et au delà ! Rendez-vous le 27 novembre à l'IUT de Lille ! On s'inscrit vite ici : www.meetup.com/chtijug/even...
De Java 21 à 25 et au-delà: Loom, Amber et les autres, Thu, Nov 27, 2025, 6:45 PM | Meetup
Bonjour tout le monde ! Nous sommes très heureux de vous annoncer la prochaine session du Ch'ti JUG. Cette session aura lieu le **Jeudi 27 Novembre à 18h45** et sera héberg
meetup.com
At #Devoxx this week? Join our BOF, Thursday, October 9, 18:50-19:50 (m.devoxx.com/events/dvbe2...). Otherwise, we have another tip for you just across the border: Heather VanCura, Chair of the JCP speaks at the JUG in Lille (France) Join them there!(www.meetup.com/chtijug/even...).
Nous avons le plaisir de vous annoncer la prochaine session du Ch'ti JUG ! Elle aura lieu le 09/10 à Euratechnologies Nous aurons l'immense honneur d'accueillir Heather VanCura, chair of JCP (Java Community Process) On s'inscrit vite ici: www.meetup.com/chtijug/even...
Pourquoi et comment participer au futur de Java, Thu, Oct 9, 2025, 6:45 PM | Meetup
Bonjour à tous ! Nous sommes très heureux de vous annoncer la prochaine session du Ch'ti JUG. Cette session aura lieu le **Jeudi 9 octobre à 18h45** chez Euratechnologies.
meetup.com
simdjson est un projet écrit en C++et dis licence Apache 2 permettant de parser de très grandes volumétries de JSON à la vitesse de l'éclair en utilisant des instructions simd et des optimisations poussées ⬇️ github.com/simdjson/sim...
GitHub - simdjson/simdjson: Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks
Parsing gigabytes of JSON per second : used by Facebook/Meta Velox, the Node.js runtime, ClickHouse, WatermelonDB, Apache Doris, Milvus, StarRocks - simdjson/simdjson
github.com
C’est qui qui a fuité aujourd’hui ? Google bonjourlafuite.eu.org#Google-2025-...
C’est qui qui a fuité aujourd’hui ?
Une sponso avec Pampers peut-être ?
bonjourlafuite.eu.org
The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at or repair. —Douglas Adams, Mostly Harmless (1992)
www.meetup.com/software-cra...
[ChtiteDev-NonMixte] J'ai voulu livrer plus vite... et j'ai découvert Accelerate, Mon, Sep 8, 2025, 6:30 PM | Meetup
**Événement** **Chtitedev en non mixité** **Abstract** : Livrer plus rapidement ? Bien sûr. Mais comment savoir si on va réellement plus vite, ou simplement droit dans le
meetup.com
Anthropic put Claude in charge of running a single vending machine business. It failed. My takeaways: - LLMs are kind and want to be of service, - LLMs are naive and do not understand deviousness, - Once they start hallucinating, their context is polluted and they wander in alternate realities.
Project Vend: Can Claude run a small shop? (And why does that matter?)
We let Claude run a small shop in the Anthropic office. Here's what happened.
anthropic.com
Just read a great blog post covering PostgreSQL’s JSONB - from what it enables, to how you can use it effectively, plus tradeoffs to be aware of. Super useful if you’re dealing with semi-structured data. www.architecture-weekly.com/p/postgresql... #PostgreSQL #JSONB #DevTips
PostgreSQL JSONB - Powerful Storage for Semi-Structured Data
Object-oriented or relational? Why not both? Let's look on PostgreSQL JSONB column type and how it can help you to deliver your applications faster. We dived into how it's stored, when and why it can ...
architecture-weekly.com
GitHub Copilot Agent mode finally available in @intellijidea.com. You need to install the nightly build plugins.jetbrains.com/plugin/17718...
How AI hallucinations blindly accepted by developers can be exploited to inject malicious code - so frightening! www.bleepingcomputer.com/news/securit...
AI-hallucinated code dependencies become new supply chain risk
A new class of supply chain attacks named 'slopsquatting' has emerged from the increased use of generative AI tools for coding and the model's tendency to "hallucinate" non-existent package names.
bleepingcomputer.com