Enterprise ETL Framework Enhancement

I'm seeking an experienced professional to support the enhancement of our enterprise ETL framework designed for data processing using big data technologies on AWS.

Key Requirements:
- Focus on Apache Spark, Apache Airflow, and AWS Glue
- New feature development
- Bug fixes and optimizations

Ideal Skills and Experience:
- Strong expertise in AWS services and big data technologies
- Proficiency in Apache Spark, Airflow, and Glue
- Experience in developing new features and optimizing existing systems

Please provide relevant experience and approach.