Analytics Site v1

A site that helped day traders analyze their trading performance.

Demo

Data service - access market data and a variety of technical indicators visualized in super fast WebAssembly-powered charts
Journal service - upload a .csv file with transaction data from one’s brokerage and see a variety of analytics, charts, and reports about one’s trading performance

I designed and deployed the entire architecture and wrote all of the code
- Recently, ChatGPT has become a contributor to the project, but I’m the only human contributor :)

The site is currently offered as a free private beta, but was built with a ready-to-use payments integration for Stripe. Details:
- 1. Stripe’s payments WebSocket connects to AWS EventBridge and sends an event when a new subscription payment succeeds.
- 1. EventBridge calls a Lambda function which makes an API call to AWS Cognito with instructions to update the claims in a user’s JWT.
  - For example, the setting ‘custom:JournalSubscription’ can be set to a unix timestamp around the start of the following month
- 1. JWT claims are already in use across the site to validate user requests

Sessions are not currently used - requests are validated using JWTs. Two options are available for future use:
- 1. Establish sessions during the existing login flow using Cognito or a different auth provider (e.g. Auth0)
- 1. Use the site’s existing JWTs as authentication tokens. The JWTs are revokable, so their realtime validity can be checked against the Cognito service at the start of any session
  - The site’s JWTs (refresh, access, and id tokens) are revokable both server-side via the Cognito service console and CLI and client-side via the settings menu

Account security via Secure Remote Password (SRP) Protocol and Multi-Factor Authentication (MFA) via TOTP (Time-based One-Time Password) Apps
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