@santosh2201 Welcome.You can get yourself started following the basic guide to learning about what Plone is, what it does, and how to work with it. Learning plone.restapi is a good start following some minor contributions. Plone-react is under development now and most likely to be ready for gsoc in early march(or late feb). You can work on POC as you mentioned and feel free to post a link and discuss here or on GSoC 2018 Ideas: ReactJS