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Raphael De Lio

@raphaeldelio.dev
1.4K followers 656 following 2.1K posts

AI Engineer | Software Engineering | Forward Deployed Engineer @ Redis (@redis.io) raphaeldelio.com | youtube.com/raphaeldelio | linktr.ee/raphaeldelio

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Raphael De Lio @raphaeldelio.dev · 04/09/2026
New forward deployed engineer video: In this one, I explain how Spark prepares Snowflake data in Redis and how Redis Context Retriever exposes it to agents through generated MCP tools with access control. www.youtube.com/watch?v=TtII...
youtube.com
Runtime Data for AI Agents with Redis Context Retriever
YouTube video by Coding with Raphael De Lio
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Raphael De Lio @raphaeldelio.dev · 28/08/2026
OpenClaw is defining an enterprise architecture through RFC 27. In this video, I explain the proposed model and where Redis Agent File System fits as persistent workspace storage for disposable Kubernetes compute. youtu.be/LfdsN1qcekY
youtu.be
OpenClaw Is Going Enterprise (RFC 27) + Redis Agent File System
YouTube video by Coding with Raphael De Lio
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Raphael De Lio @raphaeldelio.dev · 31/05/2026
Experimentations with Spring AI. Multi agent architecture with streaming of what the agent is actually doing while running. #javabubble
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Raphael De Lio @raphaeldelio.dev · 26/05/2026
AI engineering means designing the context, runtime, and harness around agents so they run reliably, observably, and at scale. In my Redis webinar on May 28, I’ll focus on harness engineering: caching, session management, and rate limiting. RSVP: redis.io/resources/vi...
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Raphael De Lio @raphaeldelio.dev · 21/05/2026
Harness engineering is the buzzword of 2026. But the ideas behind it are decades old. Turns out that building scalable agents still requires the same systems engineering skills software engineers have relied on for years to build scalable and sustainable systems. redis.io/resources/vi...
redis.io
Session management, caching, & rate limiting
Solves common real-time application workloads; personalization, search, fraud detection, session management, and AI context.
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Raphael De Lio @raphaeldelio.dev · 20/05/2026
OpenAI dropped a tool to verify if an image has been AI generated. And LinkedIn is already using it to tag images that were AI made. The technology is grounded in two mechanisms. One that relies on metadata. Another that relies on imperceptible pixels. Read more: openai.com/index/advanc...
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Codetaur @vibe-coded.com · 18/05/2026
real software is still so much work wtf
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Martijn Smit @lostdomain.org · 13/05/2026
yes. just, yes. 🧑‍🍳
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Raphael De Lio @raphaeldelio.dev · 13/05/2026
Happy to announce that I'm returning as the host of the Dutch Kotlin User Group in Amsterdam after a year and a half hiatus!
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Raphael De Lio @raphaeldelio.dev · 12/05/2026
I love when users find bugs in my products. It means the product is actually being used.
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Raphael De Lio @raphaeldelio.dev · 06/05/2026
Only country in western Europe where internet works reliably: the Netherlands
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Raphael De Lio @raphaeldelio.dev · 02/05/2026
Bought more shares of Duolingo yesterday. I had previously bought it when learning Dutch a couple years ago and decided to do so again that I’m learning Japanese. Practicing something like one hour a day during a week and I can already read Hiragana. Love this app.
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Raphael De Lio @raphaeldelio.dev · 29/04/2026
I’m addicted to seeing how much energy I’m consuming/producing in realtime. I spend more time on this app than any social media 😂 @zonneplan.bsky.social
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Raphael De Lio @raphaeldelio.dev · 29/04/2026
1/9 If a service commits something to a database and then publishes a message to Kafka, what happens if the database commit succeeds but the Kafka publish fails? This problem has nothing to do with AI. But the mindset behind solving it matters a lot for AI agents.
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Raphael De Lio @raphaeldelio.dev · 27/04/2026
An agent deleted his prod db with one API call Backups were tied to same volume Least privilege. Environment isolation. Secret management. Backup isolation. Audit logs. Recovery testing. None of this is new The agent didnt invent a new failure mode. It compressed an old one into nine seconds
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Raphael De Lio @raphaeldelio.dev · 25/04/2026
Harness engineering is just ML folks hitting production for the first time, seeing their systems fail because they never had to think about security, scalability, reliability, maintainability, or system design as a whole, and then reinventing software engineering with a new name.
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Raphael De Lio @raphaeldelio.dev · 18/04/2026
“It’s not the upfront capital that kills you, it’s the operations and maintenance on the backend.” Just read this in the book The Phoenix Project by @realgenekim.bsky.social , Kevin Behr, and George Spafford. Funny how actual it sounds.
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Raphael De Lio @raphaeldelio.dev · 17/04/2026
Next Monday @iamsoham.bsky.social and I will be delivering two insightful talks at the Utrecht Java User Group. Join us to learn how AI agents can power autonomous DevSecOps pipelines and how memory works in both humans and AI Agents. www.meetup.com/nl-nl/utrech...
meetup.com
Meetup Utrecht JUG April 20th: Agentic Systems in Action, ma 20 apr 2026, 17:30 | Meetup
We are excited to announce our next Utrecht JUG meetup on **April 20, 2026,** hosted at the **Kamer van Koophandel.** Join us for an evening focused on the future of softwa
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Raphael De Lio @raphaeldelio.dev · 17/04/2026
Always a pleasure to be back at @springio.net . Especially when talking about building agentic systems with Spring AI! #java @spring-ai.bsky.social
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Raphael De Lio @raphaeldelio.dev · 13/04/2026
I’m seeing a lot of posts claiming n8n is dead. I’ve never used it and I wonder if it’s a tool that has value when building enterprise scalable agents? Or did it serve a small niche that was agglutinated by something else?
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Raphael De Lio @raphaeldelio.dev · 13/04/2026
1/ A former DevOps colleague recently woke up to a $70k GCP bill. And honestly, 𝗶𝘁 𝗺𝗮𝘆 𝗯𝗲 𝘁𝗵𝗲 𝗯𝗲𝘀𝘁 𝘁𝗵𝗶𝗻𝗴 𝘁𝗵𝗮𝘁 𝗵𝗮𝗽𝗽𝗲𝗻𝗲𝗱 𝘁𝗼 𝘁𝗵𝗲𝗺. After investigating, they found out that an 𝗔𝗣𝗜 𝗸𝗲𝘆 created in 𝟮𝟬𝟮𝟬 with no restrictions had been leaked and was now being 𝗮𝗯𝘂𝘀𝗲𝗱 𝗳𝗼𝗿 𝘁𝗵𝗲 𝗚𝗲𝗺𝗶𝗻𝗶 𝗔𝗣𝗜.
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Raphael De Lio @raphaeldelio.dev · 13/04/2026
"Products are only overnight successes in reverse. The iPod was not, the iPhone was not, the Watch was not." - Tim Cook (youtu.be/74qPQt_5DdM)
youtu.be
Apple Just Showed Us Rare Prototypes—Even Tim Cook Hasn’t Seen Them | WSJ
YouTube video by The Wall Street Journal
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Raphael De Lio @raphaeldelio.dev · 10/04/2026
Building agentic system is not about machine learning, just like building enterprise systems is not about low-level programming. @albertheijn.bsky.social has understood that. They're hiring seasoned backend engineers to implement agentic systems: www.linkedin.com/jobs/view/44...
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Raphael De Lio @raphaeldelio.dev · 07/04/2026
Started playing Eternal Darkness with a friend yesterday. A game released in 2002. We get stuck. I tell him to check ChatGPT. He checks YouTube instead. He’s not a technical person, he’s an airline pilot. What do you infer from that?
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Raphael De Lio @raphaeldelio.dev · 05/04/2026
1/ Amidst so much change and uncertainty in the world, there's something grounding about waking up to a photograph like this. My dad watched men land on the moon in 1969, when he was only 8 years old. He's the reason I care about space exploration.
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John Bistline @bistline.bsky.social · 01/04/2026
This is my favorite climate change chart. Japanese monks, aristocrats, and emperors kept meticulous records of cherry blossom festivals for 1,200 years and accidentally built the world's longest climate dataset.
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Christian Tzolov @tzolov.bsky.social · 31/03/2026
Prepping slides & demos for my Voxxed Days Amsterdam 2026 deep dive tomorrow Packing in Memory, Advisors, RAG, Tool Calling & MCP, Agentic Patterns, A2A & ACP, LLM-as-a-Judge, Guardrails… and somehow fitting it all into 2 hours! See you there 👉 amsterdam.voxxeddays.com/talk/?id=12905
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Raphael De Lio @raphaeldelio.dev · 24/03/2026
Enterprise agents won’t scale because you gave them better prompts. 𝗧𝗵𝗲𝘆 𝘀𝗰𝗮𝗹𝗲 𝘄𝗵𝗲𝗻 𝘆𝗼𝘂 𝘁𝗿𝗲𝗮𝘁 𝘁𝗵𝗲𝗺 𝗹𝗶𝗸𝗲 𝘀𝘆𝘀𝘁𝗲𝗺𝘀.
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Raphael De Lio @raphaeldelio.dev · 19/03/2026
Yesterday, @bsbodden.bsky.social and I delivered our Designing Multi Agent Systems with Spring AI hands-on lab at JavaOne in San Francisco. More than 35 people showed up and it was the lab with most registrations of the day. 🙏🙌☕️ #java
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Raphael De Lio @raphaeldelio.dev · 13/03/2026
I made the classic founder mistake this week: I built the vision instead of the product. Follow the thread /1
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Raphael De Lio @raphaeldelio.dev · 11/03/2026
It's difficult for me to believe that the cost of coding has got nearly to zero. Especially as someone who's been coding with agents consistently for almost one year.
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Raphael De Lio @raphaeldelio.dev · 03/03/2026
Redis 8 just made KEYS and SCAN faster and safer Operations that used to take 12–14 seconds on large datasets can now complete in just a few milliseconds — making previously discouraged commands viable for in production. Read the full article at: redis.io/blog/faster-...
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Raphael De Lio @raphaeldelio.dev · 28/02/2026
If the third era is about autonomous execution, then the real question might be: are our evaluation systems, testing practices, and engineering standards ready for it? Interesting article by the founder of Cursor: x.com/mntruell/sta...
x.com
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Raphael De Lio @raphaeldelio.dev · 28/02/2026
Can’t wait to be back at @springio.net !! The conference that made me love conferences!
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Raphael De Lio @raphaeldelio.dev · 27/02/2026
@anthropic.com says Claude helped NASA plan a 400m drive for Perseverance on Mars. For AI engineers, the lesson is: it was not a bigger model. It was context. Clear constraints. Domain knowledge. Structured outputs. Simulation. Human review. Reliability comes from system design.
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Raphael De Lio @raphaeldelio.dev · 27/02/2026
Anthropic just announced they're giving 6-month free of Claude Code 20X for open source contributors! If you maintain a popular project or contribute across open source, you should apply! claude.com/contact-sale...
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Raphael De Lio @raphaeldelio.dev · 24/02/2026
When does DinD (Docker in docker) start falling short and when is it just enough?
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Raphael De Lio @raphaeldelio.dev · 24/02/2026
What is your experience with DinD (Docker in Docker)? Would you recommend it? What use case did you try to build with it?
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Raphael De Lio @raphaeldelio.dev · 24/02/2026
Docker-in-docker powered by SpringBoot. How cool is that?! A complete hands on lab with no IDE required, no environment setup, no git pull, and no friction. Just open it and start building. #javabubble
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Raphael De Lio @raphaeldelio.dev · 12/02/2026
Love that KLM now let us use their planes’ wifi with no limitations for free! Now I can vibe code at 30,000 ft - currently working on my social media tracker agent built with Spring AI and Redis
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Raphael De Lio @raphaeldelio.dev · 27/01/2026
For future reference: When using Gemini models, we're required to explicitly enable structure outputs in the ChatClient. I was also using Spring AI Vertex AI integration instead of Google GenAI. Thanks @tzolov.bsky.social and @ddobrin.bsky.social!
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Raphael De Lio @raphaeldelio.dev · 26/01/2026
This was something I discovered while trying to build a reliable multi agent with Spring AI fully within GCP. With OpenAI it works flawlessly. With Gemini, constant structured output issues... Has anyone else seen this? #java #javabubble
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Raphael De Lio @raphaeldelio.dev · 26/01/2026
Am I the only finding Gemini to be less consistent to adhere to structured output than OpenAI?
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Christian Tzolov @tzolov.bsky.social · 11/12/2025
#SpringAI Tool Search Tool - Build smarter AI apps that discover tools when they need them 📖 Blog: spring.io/blog/2025/12... 🔗 GitHub: github.com/spring-ai-community/spring-ai-tool-search-tool ✅ On-demand tool discovery ✅ Multiple LLMs ✅ 34-64% token savings @spring-ai.bsky.social
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Simon Vergauwen @vergauwensimon.bsky.social · 28/11/2025
In 2 weeks we’re kicking off the Belgium @kotlinlang.org User Group with @sch3lp.bsky.social! The first session since 2019 😍 We’re starting off with a talk, and afterwards we’ll have an open space. There’ll will be lots of Kotlin and Kodee goodies 😁 See you there! www.meetup.com/belgian-kotl...
meetup.com
Kick-Off Belgian Kotlin User Group, Thu, Dec 11, 2025, 6:30 PM | Meetup
Hi Kotlin enthusiasts! I am so hyped to be hosting our first BEKUG Meetup at Kunlabora. This will be an important first time event where we'll welcome you all as members
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Raphael De Lio @raphaeldelio.dev · 28/11/2025
What happens when you get Kotlin, Spring AI, Redis, and data from the Apollo 11 together? A whole new way of exploring one the most important milestones humanity has ever accomplished! Kotlin conferences just hit different! And it was a pleasure to be part of Kotlin Dev Day! @kotlinlang.org
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Christian Tzolov @tzolov.bsky.social · 25/11/2025
JSON is the go-to format for LLM tool responses, but alternatives like TOON, XML, CSV, YAML can potentially improve token efficiency and performance. Find how to configure #SpringAI tool responses formats and optimize for your use case: spring.io/blog/2025/11... @spring-ai.bsky.social
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Raphael De Lio @raphaeldelio.dev · 25/11/2025
I don't even know anymore if LLMs are dropping the quality of anything produced by humans in every field (not only software development) or if everything has always been as mediocre as it is today. We're shipping faster and in more quantity, sure, but clearly at the expense of quality.
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Raphael De Lio @raphaeldelio.dev · 24/11/2025
This week is all about Kotlin as I get ready to speak at Kotlin Dev Day! Can't wait for a day full of Kotlin talks led by a few of the best engineers I have had the pleasure of meeting. If you still haven't got a ticket, get one with 20% discount with the code: kotlinfriends@kdd25 #java #kotlin
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Simon Vergauwen @vergauwensimon.bsky.social · 21/11/2025
All my fellow @kotlinlang.org server devs, there is still time to fill the annual Ktor survey! If you're using Ktor then please consider filling the survey, and help us continue making it better.
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