It's great that you want to contribute to Apache StreamPipes. We are an open community that appreciates any help! On the following pages, you will find some information which should help you to get started.
What part of Apache StreamPipes are you most interested in?
The Apache StreamPipes backend, mostly written in Java. Topics you could contribute include the general data model, the wrappers (e.g., for Flink, Spark, Kafka Streams, Edge or Siddhi or Python), the REST interfaces, storage etc.