How One Team Decided Their Database Was the Wrong Database

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How One Team Decided Their Database Was the Wrong Database

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Episode 30 of Tech Leadership with Fexingo dives into the hardest infrastructure decision a CTO can face: when to migrate off a database that's been running in production for years. Lucas and Luna unpack the story of a mid-stage SaaS company that switched from MongoDB to PostgreSQL after three years of accumulating workarounds, query timeouts, and data inconsistency bugs. They walk through the technical triggers — specifically a cascading replica failure during a routine backup — that forced the engineering team to admit their document store was the wrong fit for their relational domain. The episode covers how the team sized the migration, why they chose a strangler fig pattern over a big-bang cutover, and the one metric that told them the migration had succeeded: p99 query latency dropped from 1.2 seconds to 40 milliseconds. No hype, no vendor pitches — just a real engineering leadership story about admitting a mistake and executing a fix at scale. #DatabaseMigration #MongoDBtoPostgreSQL #StranglerFigPattern #EngineeringLeadership #CTODecisions #Infrastructure #TechDebt #DataConsistency #QueryLatency #PostgreSQL #MongoDB #MigrationStrategy #ProductionIncident #SaaS #TechnicalLeadership #FexingoBusiness #BusinessPodcast #Technology Keep every episode free: buymeacoffee.com/fexingo

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