MongoDB

When data genuinely doesn’t fit a fixed relational schema — variable form structures, evolving product catalogs, activity logs — MongoDB’s document model avoids constant migrations. We reach for it when that flexibility is a real requirement, not a default.

What we use it for

• Flexible, schema-less document storage
• Horizontal scaling for high-write workloads
• Good fit for rapidly evolving data structures
• Aggregation pipeline for analytics

Where it shows up in real projects

• Content management with variable field structures
• Activity/event logging at scale
• Product catalogs with inconsistent attributes
• Rapid-prototyping data layers