Exercise

The goal of the project is to build a simple business loan application system.

The system consists of the following:

Frontend
Backend

The backend would integrate with third-party providers such as:

Decision engine - This is where the final application will be submitted to present the outcome of the application.
Accounting software providers will provide a balance sheet for a selected business of the user.

Below is a sequence diagram to help visually understand the flow.

sequenceDiagram
  Actor User as User
  participant FE as Frontend
  participant BE as Backend
  participant ASP as Accounting Software
  participant DE as Decision Engine

  User ->> FE: Start Application

  FE ->> BE: Initiate Application
  BE ->> FE: Initiate Complete

  User ->> FE: Fill Business Details & Loan amount
  User ->> FE: Select Accounting provider
  User ->> FE: Request Balance Sheet
  FE ->> BE: Fetch Balance Sheet
  BE ->> ASP: Request Balance Sheet
  ASP ->> BE: Return Balance Sheet
  BE ->> FE: Return Details for Review

  User --> FE: Review Complete
  User ->> FE: Submit Application

  FE ->> BE: Request outcome
  BE ->> BE: Apply Rules to summarise application
  BE ->> DE: Request Decision
  DE ->> BE: Returns outcome

  BE ->> FE: Application Result
  FE ->> User: Final Outcome

Assumptions:

You may choose from the following language: Javascript, Typescript, Python, Golang / HTML, CSS.
For frontend, you could use a framework such as React / Vue, though basic HTML is also acceptable.
The accounting software and decision engine are already implemented. The backend should provide a simulation of the above.
The frontend can be very basic.
The accounting provider option on frontend would include Xero, MYOB and more in future.
A sample balance sheet received from Accounting provider:

sheet = [
    {
        "year": 2020,
        "month": 12,
        "profitOrLoss": 250000,
        "assetsValue": 1234
    },
    {
        "year": 2020,
        "month": 11,
        "profitOrLoss": 1150,
        "assetsValue": 5789
    },
    {
        "year": 2020,
        "month": 10,
        "profitOrLoss": 2500,
        "assetsValue": 22345
    },
    {
        "year": 2020,
        "month": 9,
        "profitOrLoss": -187000,
        "assetsValue": 223452
    }
]

Rules to be applied before sending to Decision Engine

If a business has made a profit in the last 12 months. The final value to be sent with a field "preAssessment": "60" which means the Loan is favored to be approved 60% of the requested value. If the average asset value across 12 months is greater than the loan amount then "preAssessment": "100"
Default value to be used 20

The Final output to be sent to the decision engine would contain minimum details such as

Business Details such as:
- Name
- Year established
- Summary of Profit or loss by the year
preAssessment value as per the rules

Judging Criteria

Engineering principles & standards
System extensibility & Scalability
Testability
Brevity and Simplicity

Bonus Points

Docker

FAQ

What is the time-limit on exercise ?

There is none, ensure you submit your best attempt and as soon as you possibly can.

AshiishKarhade / code-kata