In Bulk Parsing is there an acknowledgment for process completion ?

Yes, There will be an extra Json response provided, once all the resumes will be processed. This will contain the information like mentioned below:

{
  "ProcessSummary": {
    "ProcessStartedOn": "09/02/2022 2:37:06",
    "TotalNumberOfFiles": "10",
    "FolderName": "/",
    "ParsingDetail": "",
    "SourceName": [],
    "NumberOfPassedFiles": "5",
    "NumberOfFailFiles": "5",
    "ProcessCompletedAt": "09/02/2022 2:37:06"
  }
}

If you have any questions, you can always contact RChilli support at support@rchilli.com.