Complex tech,
explained
simply.
Like finding the right nut in the right tree.
Hi, I’m Cesar “Aran” Pasillas — software engineer, AI builder, and your bushy-tailed guide through Java, LLMs, microservices, and modern engineering.
No jargon forests. Just clear paths and well-hidden nuts of knowledge.
Aran DataNut
Chief Nut Architect
“Every complex system has a simpler version hiding inside it. My job is to find it — like a nut under the snow.”
- RAG Pipelines
- Java Spring
- LLM Orchestration
- Microservices
- Whisper AI
- Vector Stores
Every post, same
friendly formula
Aran breaks down each concept the same way — so you always know what to expect and always walk away with the nut.
chunks = vector_store.search(
query=“user question”, top_k=5
)
Aran DataNut
Chief Nut Architect
“Think of a RAG pipeline like my winter stash — I don’t memorize every nut’s location. I just remember which tree to check.”
- RAG Pipelines
- LLM Routing
- Vector Stores
Aran’s Nutshell
Today’s Nut
What you take home today
“Don’t memorize the whole forest. Just know which tree to check. That’s RAG in one sentence.”
- RAG = map, not memory
- Embeddings = coordinates
Latest posts
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Quick File Server
Let’s install a Quick File Server to serve files from a folder, we can use the serve package. Let’s start by installing it using the following command $ npm install serve in your terminal.
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Begin Your Node.js Project with package.json Setup
To start a Node.js project, you need a package.json file, which acts as a project manifest. Use the $ npm init command to create it, providing details like project name, version, description, entry point, and author. This file manages dependencies, scripts,…
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Efficient Node.js Installation with FNM
How Not to Install Node.js: A Better Way with fnm When it comes to installing Node.js, not all methods are created equal. Many developers rely on their operating system’s package managers, such as apt-get on Debian/Ubuntu, Brew on macOS, or Chocolatey…
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Programming Squirrel 