Originally published at spectredev.xyz. Cross-posted here for the Dev.to community.
Planning a system rewrite? Learn the strategies that let you modernise your software without halting operations, losing data, or burning your team out. (159 chars)
At some point, the question stops being "should we rewrite this?" and becomes "how do we do it without the business dying in the process?"
That's the hard part. A greenfield rewrite sounds clean on a whiteboard. In practice, you're replacing the engine of a plane that's already in the air. Customers are still signing up. Revenue is still flowing. Your team is expected to keep shipping product while simultaneously dismantling and rebuilding the thing that powers it.
Most software rewrites that fail don't fail because of bad engineering. They fail because of bad strategy no clear boundary between old and new, no plan for the transition period, and no honest accounting of how long it will actually take. This post covers how to do it without stopping your business.
