Paper trading

Goal of this test case is to figure out if candidate knows about common react patterns, redux, saga, typescript and able to figure performance bottlenecks. Time estimation: less than 5 hours.

Target solution

To pass this assignment you need your solution should pass requirements:

• React-redux as data layer, no data manipulation inside components unless it is necessary for performance.
• Typescript
  • Strictly typed: no any in components
• Orderbook
  • Use saga or redux thunk for fetching orderbook data
  • Create effective data transformations and optimizations
  • No timers inside components
• Charting
  • Feel free to pick any chart component or develop your own, but it should render updates every 500 ms.
  • Chart should contain no more than last 50 candles on screen, don't show all candles.
  • Chart could include candle volume indicator
• Layout
  • Change layout to looks close to image on scheme below

Bonus points

• Increase new candles generation to 10 times per second instead of two times.

Before you start

• Create a fork of this project in your local github
• Install dependeciens and ensure that you can run this project locally
• Check App.tsx
  • Figure out how new candles are added
  • Uncomment timer to fetch orderbook data