Writing on AI Agent Systems | Carlos Paredes, NosisTech

Connecting DeepSeek V4-Pro to Hostinger VPS Using LiteLLM and Open WebUI

October 26, 2026April 26, 2026 by Carlos Paredes

Architecture diagram showing DeepSeek V4-Pro connected through a LiteLLM proxy to a Hostinger VPS, enabling OpenAI SDK compatibility for self-hosted AI inference.

how to run DeepSeek V4-Pro on Hostinger VPS with LiteLLM and Open WebUI

AI Assistant Tuning: What Broke and Finally Worked

October 26, 2026April 25, 2026 by Carlos Paredes

Before and after comparison showing AI assistant performance metrics including hallucination rate, response latency, context retention, and relevance score improvements after systematic tuning.

Fixing a local AI voice assistant that ignored its system prompt — the Modelfile approach that worked

I Built a Private AI Voice Assistant – Runs Entirely on My Laptop

October 26, 2026April 25, 2026 by Carlos Paredes

Laptop screen illustration showing a glowing microphone icon with sound wave rings and a privacy lock badge, representing a fully offline private AI voice assistant running locally without cloud services.

Building a private self-hosted AI voice assistant with Ollama and Open WebUI on Windows.

Fixed Persistent WordPress Admin Bar Leak And Automated the Cache

October 26, 2026April 23, 2026 by Carlos Paredes

Diagram showing a WordPress security vulnerability being identified and fixed, followed by an automated cache purge workflow to prevent the admin bar from leaking to logged-out visitors.

WordPress admin bar visible to guests? Here is how I fixed it at the code level using WPCode, LiteSpeed, and a Cloudflare scoped API token.

How I Built a Google Search Console Automation With n8n

October 26, 2026April 22, 2026 by Carlos Paredes

Workflow diagram showing automated pipeline from Google Search Console data through an n8n automation node triggered by a cron schedule to generate and deliver SEO performance reports.

I built an n8n automation to ping Google Search Console daily and notify me on Telegram. Here is what broke and how I fixed it.

Cloudflare Cache Rules, WAF, and the REST API Leak I Almost Ignored

October 26, 2026April 22, 2026 by Carlos Paredes

Layered security architecture diagram showing Cloudflare WAF, cache rules, REST API firewall, and origin server stacked as defense-in-depth layers for a self-hosted website.

Real hardening decisions on a live WordPress site — cache rules, WAF, and a REST API leak I almost missed.

Securing my website Against AI Scrapers, Bots, and Brute Force Attacks

October 26, 2026April 22, 2026 by Carlos Paredes

Security shield diagram showing web bots and scrapers being blocked by a firewall, representing Cloudflare WAF rules and rate limiting protecting a self-hosted website from automated threats.

Real WordPress security hardening on Cloudflare’s free plan — what I found, what I fixed, and what I got wrong.

From Laptop to Cloud: Migrated My Discount Monitor to a VPS

October 26, 2026April 21, 2026 by Carlos Paredes

Migration diagram showing the transition of an automated discount monitoring workflow from a local laptop setup to an always-on virtual private server in the cloud.

A few days ago I built a simple but useful automation: an n8n workflow that checks the Google Cloud certifications blog every morning . It uses a local AI model to detect any exam discounts or promo codes, and sends me a Telegram message with the result. No more manually checking. No more missed deals. … Read more

I Built a Local AI Discount Monitor with n8n, Ollama, and Telegram

October 26, 2026April 20, 2026 by Carlos Paredes

Pipeline diagram showing automated discount monitoring workflow: n8n orchestration connecting to a local Ollama LLM that analyzes prices and sends Telegram alerts when discounts are detected.

I built a local AI workflow with n8n, Ollama, and Telegram to monitor GCP cert discounts daily, here’s every mistake I made and how I fixed them.

Securing a Self-Hosted AI Lab with Cloudflare Zero Trust

October 26, 2026April 20, 2026 by Carlos Paredes

Shield diagram illustrating Cloudflare Zero Trust security architecture surrounding a self-hosted AI lab, with multiple verified network connection nodes and a never-trust, always-verify policy.

Within hours of going live, my home AI lab was being probed from Bulgaria, the Netherlands, Singapore, and the US. Here is what I did about it and what I learned about securing self-hosted infrastructure the right way.

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