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Danubio
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Our notes.

From the people building Danubio's client work, on engineering, the industry, and what our experience teaches us.

A steel ship underway, its weathered grey aft half intact while the rebuilt forward half is painted teal, the water beneath undisturbed.
EngineeringJune 2, 2026

How we rebuilt a backend without migrating the data

The riskiest rebuilds change code and data at once. We kept one shared data layer, got read parity for free, and deferred schema changes until after cutover.

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How we rebuilt a live multi-tenant SaaS without downtime
EngineeringApr 10, 2026

How we rebuilt a live multi-tenant SaaS without downtime

We took ownership of a live real estate platform and rebuilt the backend under it, moving tenants one at a time with no downtime. It now runs 5,000+ tenants.

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Many of these posts started as client projects.

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