JC
Julissa Cotillo

Blog

Insights on AI architecture, data systems, and building intelligent products.

Beyond Basic Checks: Engineering a Robust Data Validation Layer for PMS to Eliminate Overbookings
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Beyond Basic Checks: Engineering a Robust Data Validation Layer for PMS to Eliminate Overbookings

The Fragility of Superficial Validation in Property Management Systems Overbookings aren't just a headache in property management—they're a sign of broken data integrity. For too long, Property Management Systems (PMS) have relied on simple data checks. Think basic format validation, like making sure a date looks like a date, or that a field isn't blank. These checks are necessary, but they don't stop the data corruption that causes double bookings and lost revenue. The real problem is that boo

Mar 9, 2026·5 min read
Building Impactful AI Features Without an ML Team: Realistic Paths Beyond No-Code Hype for Startups
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Building Impactful AI Features Without an ML Team: Realistic Paths Beyond No-Code Hype for Startups

The New Reality of AI: Accessible Innovation Beyond the Tech Giants You don't need a team of expensive machine learning experts to build a real AI product anymore. That idea is quickly becoming outdated. For startups, the cost and complexity of using AI have dropped dramatically. The key isn't building models from scratch; it's about using existing tools to solve a real problem. This shift helps you get to market faster. Instead of just experimenting, you can focus on a specific business need.

Mar 9, 2026·4 min read
The Secret to Repeatable Growth: Mastering Data Experimentation for Your Vacation Rental Business
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The Secret to Repeatable Growth: Mastering Data Experimentation for Your Vacation Rental Business

The Dawn of the Data-Driven Vacation Rental Entrepreneur Your gut feelings got you this far. They helped you pick the right properties, furnish them beautifully, and earn those first five-star reviews. But in a market this crowded, intuition is a liability. The difference between a portfolio that pays the bills and one that builds real wealth is data. It’s about building a system of repeatable, predictable growth—not just hoping for a good season. This isn't about drowning in spreadsheets. It's

Mar 9, 2026·4 min read
Beyond MLOps: Engineering AI Systems for Terabyte-Scale Production Loads & 99.99% Uptime
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Beyond MLOps: Engineering AI Systems for Terabyte-Scale Production Loads & 99.99% Uptime

The New Frontier of AI: From Experimental Models to Resilient, High-Thrust Production Systems Your new AI model looked perfect in the lab. But in production, it starts failing silently, costing you millions before anyone notices. The problem isn't the model's accuracy in a notebook; it's the system's inability to handle the chaos of the real world. When your product's core features depend on AI, you're dealing with massive data volumes and the need for 99.99% uptime. This isn't a data science p

Mar 9, 2026·5 min read
Superhog vs. Clarity: A Technical Comparison for Rental Operators
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Superhog vs. Clarity: A Technical Comparison for Rental Operators

Is Your Guest Screening a Black Box? Is your guest screening solution a black box? This article compares the data you get from Superhog versus a developer-first ideal. We'll analyze the technical strengths of Superhog, a major player in guest screening, and contrast it with 'Clarity.' 'Clarity' is our concept for an ideal platform focused on data quality, API flexibility, and easy integration. This guide is for CTOs, lead engineers, and data scientists who need to know what's really under the h

Mar 9, 2026·5 min read
entrepreneurship

Figuring It Out: How We're Applying an Experimental Mindset to Building a Business as a Duo

We're a 2-person team building something new. We don't have customers. We don't have answers. What we do have is an experimental mindset. This isn't advice—it's field notes from the messy middle.

Feb 2, 2026·10 min read
ai

Coaching Confidence with AI: A Personal Journey into Speech and Self Improvement

A personal exploration of using AI to improve communication confidence, combining traditional coaching techniques with modern technology for private, personalized speech improvement.

Sep 4, 2025·4 min read
n8n

Why I'm Moving My AI Logic Out of n8n (But Keeping It in the Loop)

How I transformed a clunky two-workflow plus Discord bot setup into something cleaner and easier to manage with Google's ADK, while still letting n8n shine where it's best - predictable orchestration.

Aug 19, 2025·4 min read
ios

Overcoming iOS Browser Limitations for Voice-Enabled AI Apps

A comprehensive guide to navigating iOS browser constraints when building voice-enabled AI applications. Learn about debugging strategies, audio playback workarounds, and technical solutions for Safari and WebKit limitations.

Jun 29, 2025·6 min read
rag

Breaking Down a RAG System: A Practical Intro Inspired by Learning LangChain

A comprehensive guide to understanding and building Retrieval-Augmented Generation (RAG) systems using LangChain. Learn about core components, scaling challenges, and optimization techniques through a practical Airbnb chatbot use case.

Jun 10, 2025·5 min read
backend

Background Work, Frontline Gains: Unlocking Async with A2A

Exploring the power of Google's Agent to Agent (A2A) protocol for building scalable, asynchronous AI systems. Learn how async patterns are foundational for intelligent agent-based applications and why A2A could become the standard for modern AI workflows.

May 1, 2025·4 min read
ai

Data-Sovereign AI Therapy: Building Couple's Support with Google's Agent Development Kit

Exploring the promise and challenges of AI-powered therapeutic tools, emphasizing the importance of data sovereignty in sensitive applications like couples therapy. Learn how Google's Agent Development Kit (ADK) can be utilized to build self-hosted agents that keep user data under control.

Apr 24, 2025·5 min read
terraform

From Vibe Code to Live: The Terraform Wrapper That Teaches Your Agent to Deploy

Stop watching AI agents burn tokens re-learning Terraform every session. Build a skill and module pattern that teaches your agent once, then deploys anything to GCP Cloud Run.

Jan 17, 2025·8 min read
project

Airbnb Replier: Automated Guest Communication with Human-in-the-Loop Approval

An automated guest communication system that monitors Airbnb messages with n8n, crafts intelligent responses using Google ADK, and implements human-in-the-loop approval through Slack integration.

Jan 14, 2025·6 min read
project

BnB Tuner: AI-Powered Listing Optimization for Airbnb Hosts

An AI-powered tool that analyzes Airbnb listings and suggests improvements for better copy, plus exploring AI-driven professional photo editing to maximize booking potential.

Jan 14, 2025·5 min read
backend

Building a Scalable Chatbot Backend with Vertex AI and Retrieval-Augmented Generation (RAG)

Learn how to build a powerful, scalable chatbot backend using Google Cloud's Vertex AI and Retrieval-Augmented Generation (RAG) techniques. This blog covers the integration of Gemini models, the setup of a RAG corpus, and deploying via Google Cloud Functions, with key insights on overcoming data access challenges.

Aug 14, 2024·6 min read
frontend

Deploying a Next.js App on AWS EC2: A Beginner's Guide

Learn how to deploy a Next.js application on AWS EC2 with Amazon Linux, Nginx, and PM2. This step-by-step guide is perfect for beginners and covers everything from launching an EC2 instance to configuring Nginx and ensuring continuous application uptime with PM2.

Aug 14, 2024·4 min read