Large file reading challenge

Welcome in the recruitment challenge. Write an application that, at the endpoint specified by you, returns the yearly average temperatures for a given city in the format array of objects with the following fields: year, averageTemperature.

Assumptions

• CSV file with data is no less than 3GB in size.
• The file represents temperature measurements in the format city;yyyy-mm-dd HH:mm:ss.SSS;temp
• The content of the source file may change during the application's running

Example source file

example_file.csv

Example response

[
  {
	"year": "2021",
	"averageTemperature": 12.1
  },
  {
	"year": "2022",
	"averageTemperature": 11.1
  },
  {
	"year": "2023",
	"averageTemperature": 14.1
  }
]