Serverless Cloud-Based Application Development

I'm seeking a professional to design, develop and deploy a serverless cloud-based application using the essential AWS services. As the primary objective of this undertaking, the application should be tailored towards efficient serverless computing.

Key Functionality Inclusions:

- Real-time file processing
- Streamlining data transformation tasks
- Development of robust backend API

Desired AWS Tools:

- AWS Lambda for serverless computing
- Data storage and management using AWS DynamoDB
- Utilization of AWS S3 for data storage

The ideal freelancer for this project should be proficient in Python and BOTO3 for scripting and automation tasks, with a proven track record in AWS Lambda usage. Your ability to leverage these technology stacks to optimize serverless computing will be essential to the success of this project.