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Robert N. Gutierrez

I write about what actually goes wrong in production, scraping failures, silent data loss, monitoring gaps, and how to design systems that don’t lie.

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How to Export Depop Listings to a Shopify CSV Using Python

How to Export Depop Listings to a Shopify CSV Using Python

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4 min read
From Scrape to Feed: Building a Google Merchant Center CSV from Zappos Data

From Scrape to Feed: Building a Google Merchant Center CSV from Zappos Data

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4 min read
Bulletproof Data Pipelines: Adding Schema Validation to Nike Scrapers

Bulletproof Data Pipelines: Adding Schema Validation to Nike Scrapers

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5 min read
The 5-Minute Repair: A Workflow for Surviving Site Redesigns

The 5-Minute Repair: A Workflow for Surviving Site Redesigns

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4 min read
Automating Market Research on Dermstore: Scrape Categories and Monitor Inventory Trends

Automating Market Research on Dermstore: Scrape Categories and Monitor Inventory Trends

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5 min read
Building a Costco Price Tracker with Python, Playwright, and Streamlit

Building a Costco Price Tracker with Python, Playwright, and Streamlit

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4 min read
Dynamic Selector Fallbacks: How to Scrape E-commerce Sites That Change Frequently

Dynamic Selector Fallbacks: How to Scrape E-commerce Sites That Change Frequently

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5 min read
Building a 'Data-on-Demand' Microservice: Wrapping Alibaba Scrapers for Internal Tools

Building a 'Data-on-Demand' Microservice: Wrapping Alibaba Scrapers for Internal Tools

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5 min read
The Waterfall Pattern: A Tiered Strategy for Reliable Data Extraction

The Waterfall Pattern: A Tiered Strategy for Reliable Data Extraction

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5 min read
Building a 'Living' Market Intelligence Dashboard with Python and Streamlit

Building a 'Living' Market Intelligence Dashboard with Python and Streamlit

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5 min read
How to Generate a Google Shopping Feed from Any Website Using Python

How to Generate a Google Shopping Feed from Any Website Using Python

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5 min read
The 99.9% Reliability Stack: Implementing Error Budgets in Web Scraping

The 99.9% Reliability Stack: Implementing Error Budgets in Web Scraping

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5 min read
Why Your Competitive Intelligence Scrapers Fail: A Deep Dive into Browser Fingerprinting

Why Your Competitive Intelligence Scrapers Fail: A Deep Dive into Browser Fingerprinting

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6 min read
How to Use Competitor Out-of-Stock Data to Optimize Ad Spend

How to Use Competitor Out-of-Stock Data to Optimize Ad Spend

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5 min read
Mitigating 'Scraping Shock': Engineering Cost-Aware Data Pipelines

Mitigating 'Scraping Shock': Engineering Cost-Aware Data Pipelines

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5 min read
The Hybrid Fallback Strategy: Combining Cheerio and Playwright for Maximum Reliability

The Hybrid Fallback Strategy: Combining Cheerio and Playwright for Maximum Reliability

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4 min read
Python vs. Node.js: I Used AI to Build the AppSumo Scraper in Both Stacks

Python vs. Node.js: I Used AI to Build the AppSumo Scraper in Both Stacks

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5 min read
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