Scaling a Monolith to 1M LOC: 113 Pragmatic Lessons from Tech Lead to CTO
Summary
The article is a practical compendium of 113 lessons for scaling a large web monolith to 1M lines of code, covering performance tuning, deployment discipline, monitoring, frontend/backend optimizations, caching, testing, and security, with actionable patterns and organizational playbooks for maintainability at scale.