Real-Time Financial Data Web App

I need a web application that utilizes websockets for live updates of financial data. This app should be optimized for both desktop and mobile devices.

Ideal Skills:
- highly skilled in front end development.
- Proficiency in WebSocket programming
-Login/Sign up authentication
- Experience in developing real-time web applications
- Proficiency in handling multithreaded http requests and third party api usage.
- Ability to create responsive designs for different devices and customised UI.
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Please provide examples of similar projects you've completed in your proposal.