TLDR Web Dev · ARTICLES & TUTORIALS

FROM 8 YEARS DOWN TO 6 MONTHS: HOW WE BUILT AI TO SPLIT THE MONDAY.COM MONOLITH

engineering.monday.com8 min read

Summary from the TLDR Web Dev newsletter

Monday.com successfully used an AI-powered migration system called "Morphex" to break apart its massive JavaScript client monolith in just 6 months, reducing the original estimate of 8 person-years of manual work. Morphex combines AI with deterministic code orchestration, breaking the complex migration into small, validated steps while using Monday.com's own platform to track progress and manage thousands of files across the codebase. The hybrid approach has strict validation at each step, human oversight through "Human Todos" and code reviews, and parallel processing to migrate from JavaScript to TypeScript.