Welcome to my blog: who I am and what this is about
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Welcome to my blog: who I am and what this is about

An intro to this space: who I am, what I do, and what kind of content you'll find here. No fluff, with code and honest opinions.

• 6 min read
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I’m not here to sell you the framework of the moment or repeat what the official documentation says. I’m here to share how I work, what problems I solve, and what I learned by banging my head building real things.

If you got here looking for tutorials on “how to make a todo-list in React”, this probably isn’t the place. But if you’re interested in seeing how someone with over 20 years in this field thinks through projects, makes technical decisions, and sometimes gets it wrong… welcome.

Who I am

I’m Leandro Asrilevich, although online I’m known as qazuor. Full-stack developer with a frontend focus, based in Concepcion del Uruguay, Entre Rios, Argentina.

My history with web development started over two decades ago. I went through agencies, personal projects, teaching, and freelance work, but the stage that marked me the most was at Avature, where I spent 19 years (2006-2025).

The Avature experience

I joined when Avature was practically a startup. There were few of us, we did everything, and the hyper-specialized roles of today didn’t exist. Over time, the company grew into a multinational with global presence, and I grew with it.

Some highlights from that stage:

  • 2007-2008: I developed an internal framework in vanilla JavaScript, with dynamic dependency loading, HMR, bundling, error reporting Sentry-style, and a component system with lifecycle. All of this before Webpack existed.
  • 2012-2017: I led the UI Core team, responsible for the platform’s framework and UI system. We scaled the team from 2 to 9 people, established code review standards, architecture, and mentoring.
  • 2017-2019: Feature Incubation as a one-person team. My role was to take ideas, bring them to a working MVP, and transfer them to dedicated teams.
  • 2019-2025: Visual Template Builder, an internal visual builder like Webflow to create portals, email templates, and content generated from the platform.

Those 19 years taught me to work in large teams with code reviews, shared standards, and technical coordination. But also to move alone when needed, taking projects from start to finish.

What I do today

Currently, I dedicate myself to building complete digital products: from the idea to the deploy, including architecture, frontend, backend, automations, and everything needed to make something actually work.

I work mainly with TypeScript, React, Astro, Node.js, and the modern JavaScript ecosystem. I also do No-Code automations with Make.com for operational flows where it doesn’t make sense to write custom code.

Some projects I’m working on:

  • Hospeda — Tourism platform for the Argentine Litoral, with tools for hosts and AI integration.
  • Asistia — Multi-tenant system of conversational AI agents, ready for multiple channels and integrations.
  • Claude Code Config — CLI to configure projects with Claude Code: agents, skills, commands, MCP servers.
  • BookMind — Bookmark manager with automatic AI summaries and semantic search.

What this blog is about

This is my space to share what I learn while building. It’s not a blog of generic tutorials, it’s more of a collection of:

Real technical decisions — Why I choose one tool over another, what trade-offs I consider, and when I get it wrong.

Architecture and organization — How I structure projects, monorepos, components, and how I keep code maintainable long-term.

Modern frontend — React, Zustand, TanStack Query, TanStack Router, Astro, and everything I use day to day.

Pragmatic backend — Hono, Drizzle ORM, PostgreSQL, REST APIs, and how I connect everything without creating a Frankenstein.

AI for devs — How I use Claude, ChatGPT, and other tools to accelerate my work without losing control of the code.

Development diaries — The real process of building products from scratch, with the problems, decisions, and pivots included.

What you WON’T find here

Posts written by AI without review or criteria. Tutorials copied from official documentation. Empty hype about technologies I don’t use. Promises of “master X in 5 minutes”.

Everything I write here comes from real experience. If I haven’t tried something, I don’t recommend it. If something went wrong, I tell you about it too.

The tone

I write in Rioplatense Spanish (I’m Argentine), so you’ll find voseo, local expressions, and a pretty direct tone. I don’t like corporate content or posts full of buzzwords.

I prefer a short post that says something useful over a long one that says nothing.

I leave technical terminology in English (code, deploy, branch, testing) because that’s how we talk among devs and it avoids confusion.

How to navigate the blog

Posts are organized by categories and tags. You can filter by topic or just scroll. Some posts are part of series, like Building Hospeda where I document the process of building a tourism portal from scratch.

You also have a Goodies section where I upload tools, snippets, tricks, and useful resources I’ve collected.

Want to chat?

If you want to talk about a project, have an idea you want to bring to life, or just want to say hi:

And if you’re looking for someone to help you build a digital product, design your project’s architecture, or just need a hand with something technical, tell me what you have in mind. It’s always easier to talk about it than to guess.

Thanks for stopping by. I hope you find something useful here.

— qazuor