As for my current masters, I have recently completed creating an autoscaling application on AWS.

The application, was to take in text files and output the frequency of each words in the text. The application included autoscaling with custom cloudwatch alarms to scale with demand, elestic load balancing to keep a healthy application, and much more. I ended up using s3, SQS, ec2, cloudwatch, DynamoDB, SNS, security groups and IAM roles.