There are many ways of using Lambdas. It was originally a DevOps tool to inject a little logic, and that's where the idea of tiny Lambdas came from.
Lambda grew up. We're writing entire enterprise applications with them now, and managing thousands of independent tiny Lambdas is impractical, to say the least.
When writing enterprise applications, the proven practices of decades of software engineering still apply.
The author has clearly studied the work of Uncle Bob, and is putting those techniques to proper use.

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Consulting Software Engineer and AWS Solutions Architect with over 34 years of experience. Specializing in AWS serverless application development and IoT.

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