Jolie is a service-oriented programming language, developed with the aim of making some key principles of service-oriented programming syntactically manifest. Express is a leading framework in the world of JavaScript for the creation of REST services.

The concepts behind Express/JavaScript and Jolie are not that distant, but they are offered under different shapes: one aimed at building on top of JavaScript and Node.js, the other aimed at expressing these concepts declaratively. The aim of this article is to identify the first differences that arise between Express and Jolie in the development of a REST service by comparing how the same concepts are codified.

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