Using a Java / Spring External Worker | Flowable | 2026
In this tutorial, Valentin Zickner walks you through installing and using the Flowable External Worker Client, creating and running a Java external worker, integrating it into a Flowable process, and exchanging process variables end-to-end in a practical, step-by-step demo. Perfect for developers looking to extend Flowable with external services and custom workers based on Java and Spring Boot.
▶ GitHub Repository: https://github.com/flowable/flowable-...
▶ Table of contents:
00:00 Introduction
00:38 Creating a spring project start.spring.io and the Spring CLI
01:12 Overview over the project
01:34 Adding the Flowable external client dependency
02:03 Adding the external worker example from the GitHub Repository
02:55 The connection properties for the external worker and how to connect to the Flowable Trial
03:39 Starting the application which will connect in the background
03:52 Creating an app and process in Design
04:29 Adding the external worker task to the process
04:42 Configuring the job topic
04:59 Saving, publishing and creating a new instance of the process
05:30 How the external worker library works
05:52 The process in Flowable Work
06:05 Passing variables to the external worker
06:51 Receiving variables from the external worker
07:42 Saving, publish and creating a new instance
08:20 Iterating over variables coming from Flowable
08:50 Returning a result from the external worker
09:55 Starting the external worker with variables
10:11 The result in Flowable Work
10:33 Summary + wrap-up
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► About Flowable
Flowable is the intelligent business automation platform to automate end-to-end processes. From simple and repetitive, to complex and unpredictable scenarios – transform your business by connecting systems, data and people.
Being open and low-code, Flowable enables organizations to build tailored applications at speed and at scale, optimizing resources and reducing time to value, while maintaining full regulatory compliance.
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