
Legacy System Modernization Without a Big-Bang Rewrite
Replace risky parts of an older system in controlled stages. Learn how seams, a facade, contract tests, parallel runs, and rollback turn modernization into managed delivery.
Topic

Articles and decision guides on software-architecture.

Replace risky parts of an older system in controlled stages. Learn how seams, a facade, contract tests, parallel runs, and rollback turn modernization into managed delivery.

Microservices buy independent change at a real operating cost. Compare both models through boundaries, ownership, data, deployment, and signals that justify extraction.

Strategy, Adapter, and Factory solve different kinds of change. Learn how to recognize the moment each pattern earns its place and when a direct function is better.