I have mentioned a few of my works below and they are all on my github.
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LinkRef
I have developed a social media application where links are shared, users can add each other as friends, block and message each other..
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Live Lesson App
I used jitsi api while developing this app. Users can communicate with each other live broadcast. Courses can be added and course hours can be determined..
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Chat App
I have developed a chat application with only messaging processes and the nodejs socket.io package is used in the backend.