We source, vet, and manage hiring so you can meet qualified candidates in days, not months. Strong English, U.S. time zone overlap, and compliant hiring built in.
.svg){kind=logo}
Nokogiri is a Ruby gem for parsing, searching, and manipulating HTML and XML documents. It provides an intuitive API for selecting elements via CSS or XPath, extracting data, and modifying documents. Nokogiri wraps the libxml2 C library, making it fast and memory-efficient even with large documents.
Nokogiri is the standard choice for web scraping, API response parsing, document processing, and any task requiring reliable HTML/XML manipulation in Ruby applications.
Nokogiri developers in Latin America typically earn $40,000–$65,000 USD annually (2026 market rates). Senior engineers with complex scraping and data pipeline experience command $65,000–$95,000+.
Hiring through South saves you 40–50% vs. U.S.-based Ruby talent, while giving you access to developers experienced with high-volume scraping, data integration, and ETL pipelines.
Latin America has a strong Ruby community, particularly in Mexico, Colombia, and Argentina. Many developers have built web scrapers, data pipelines, and content integration systems for startups, e-commerce platforms, and fintech companies—bringing production-grade knowledge of scraping at scale, handling rate limits, and managing data quality.
LatAm Ruby engineers are pragmatic problem-solvers, often finding elegant solutions to complex parsing and transformation challenges.
South vets candidates on Nokogiri fundamentals, XPath/CSS selector expertise, and scraping best practices. We test their ability to write robust, maintainable parsing and scraping code that handles edge cases gracefully.
Every developer we send understands ethical scraping, error handling, and data validation. If the fit isn't right after 30 days, we replace them at no cost.
Check the website's terms of service and robots.txt. Many sites allow scraping if you respect their rules. Some explicitly forbid it. Always follow legal and ethical guidelines. When in doubt, use a public API instead.
Nokogiri parses static HTML; it doesn't run JavaScript. For JavaScript-heavy sites, use Puppeteer, Playwright, or Capybara with a headless browser. Then pass the rendered HTML to Nokogiri.
Nokogiri has lenient HTML parsing built in. It will parse malformed HTML without raising errors. Test with .inspect to see what Nokogiri actually parsed vs. what you expected.
Use streaming parsers for very large files (Nokogiri::HTML::SAX). For regular documents, use efficient CSS/XPath selectors. Avoid unnecessary traversals. Profile with Ruby Profiler if performance is critical.
Yes. Create, modify, or delete nodes. Then call .to_html or .to_xml to serialize. You can also write directly to a file.
Nokogiri auto-detects encoding from HTML meta tags or XML declarations. You can also specify encoding explicitly. Test with various encodings if internationalization is important.
Use a library like Mechanize or Faraday with cookies/session management to log in, then pass the authenticated HTML to Nokogiri. Or use Puppeteer/Playwright for JavaScript-heavy authentication flows.
Wrap scraping in begin/rescue blocks. Implement exponential backoff for rate limiting. Use background jobs (Sidekiq, Resque) for resilience. Log errors and retry failed items intelligently.
Yes. Use .css() or .search() with namespace-aware XPath. Register namespaces with .remove_namespaces! if you want simplified selectors, or use namespace prefixes in XPath.
Fetch HTML/XML via HTTP (Net::HTTP, Faraday). Parse with Nokogiri. Extract and validate data. Store in database or queue for processing. Handle errors and retries. Monitor data quality and schema changes.
Explore more Ruby development and data extraction skills with South's vetted LatAm engineers.
