We did something similar on our site but the max duration of each job was 5 mins. So maybe this solution may not be totally relevant to you but what were doing

We did something similar on our site but the max duration of each job was 5 mins. So maybe this solution may not be totally relevant to you but what were doing is we've created a aws lambda function that is triggered when a file is written on S3. So instead of traditional SQS we just write unique files on S3 with job data and that triggers the lambda function to process the job and notify a URL upon completion.