The expand-and-contract pattern, safe column renames, dual-writing, and managing schema changes with zero user impact.
Running `ALTER TABLE ADD COLUMN ... DEFAULT 'foo'` or dropping columns on active tables can acquire an `AccessExclusiveLock`, blocking all read and write queries until the operation finishes. Under concurrent traffic, this causes immediate 504 gateway timeouts.
We follow the Expand-and-Contract migration pattern across multiple deployment stages to ensure zero lock contention.
Ensure your production database migration executes without downtime or data loss.
Over 4+ years leading frontend architecture, refactoring monolithic web apps, and partnering with funded founders across Europe and the US.
When venture-backed founders face velocity bottlenecks or architectural gridlock, hiring an agency results in bloated decks and junior contractors. Here is my exact fractional engagement blueprint developed over 4+ years.
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