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What does "brownfield" mean in programming?

brownfield is one of the most common terms in software development. This guide explains what it means, how it is used in practice, and why it matters, with real examples from the developer world.

Definition

A project that involves working on or alongside existing code, systems, or infrastructure. Brownfield development requires understanding what already exists before making changes, and every decision is constrained by the current system.

Example

"We are doing brownfield development: the new payment service has to integrate with a 10-year-old monolith."

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