Narendra Pathai

Create an IRCTC type service

Create Fandango or BookMyShow type service

Create a Web Crawler

Create API rate limiter type service

Create Google Docs type service, which allows basic collaboration writing feature

Create Leetcode type service, specifically the code execution and verification aspect.

Create typeahead suggestion engine

Create YouTube or Netflix like service

Create WhatsApp messenger like service, where history is maintained in client device. Undelivered messages are kept in cloud.

Design Facebook messenger like service. Message history is maintained in cloud.