MYP Senior Engineer Test

Build an investment app API.

It should allow you to:

• Add an investment

  • An investment should include:
    • Name
    • Start Date
    • Interest Type: Simple or Compound
    • Interest Rate
    • Principle Amount
  • The name of an investment should be unique

• Update an investment

• Delete an investment

• Fetch Investment

  • Returning:
    • Name
    • Start Date
    • Interest Type: Simple or Compound
    • Interest Rate
    • Principle Amount
    • Current value of the investment rounded to the nearest month

  Acceptance Criteria 1
  GIVEN an investment is of type simple
  WHEN interest is calculated
  THEN a value is returned equal to  A = P(1 + rt)
  AND the period is rounded to the nearest month
  
  Where:
  A = Total Accrued Amount (principal + interest)
  P = Principal Amount
  I = Interest Amount
  r = Rate of Interest per year in decimal
  t = Time Period involved in months or years
  See https://www.calculatorsoup.com/calculators/financial/simple-interest-plus-principal-calculator.php
  
  Acceptance Criteria 2
  GIVEN an investment is of type compound
  WHEN interest is calculated
  THEN a value is returned equal to  A = P(1 + r/n)nt
  AND the compounding perdiod is Monthly
  AND the period is rounded to the nearest month
  
  Where:
  A = Accrued amount (principal + interest)
  P = Principal amount
  r = Annual nominal interest rate as a decimal
  n = number of compounding periods per unit of time
  t = time in decimal years; e.g., 6 months is calculated as 0.5 years. 
  See https://www.calculatorsoup.com/calculators/financial/compound-interest-calculator.php
  
  Acceptance Criteria 3
  GIVEN an investment exists
  WHEN the investement is fetched via the API
  THEN the investment is returned
  AND the current value of the investment is returned calculated rounding to the nearest month
  
  

• Authentication is not needed

• In memory DB is acceptable

• It should be extensible

• Quality should be high

Instructions:

• Push your solution to your github repo
• Please use your commits to tell a story (i.e. not one big commit)
• Be ready to answer questions about your choices
• Send an email with:
  • A link to your repo
  • Summary of what you have improved including why
  • Any changes/improvements de-prioritised and not implemented with notes on your decision