Dev Tools · 1h ago
Modernize legacy AS/400 systems with APIs, not rewrites
Many companies still run core business on AS/400 (IBM i) systems. Rewriting from scratch is risky and often fails; instead, expose existing RPG and DB2 logic via APIs using Java and Spring Boot. This "strangler fig" approach builds a modern layer around the old system, enabling gradual migration without downtime.
Meridian48 take
The article makes a solid case for incremental modernization, but glosses over the challenge of finding developers who can bridge RPG and modern stacks.
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Modernising a legacy AS/400 (IBM i) system without rewriting it →
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