AWS Scala Glue ETL + spark

I am looking for a freelancer who can assist me with writing Scala code for data processing on AWS Glue and Spark.

Specific tasks include:
- Writing efficient Scala code for data processing
- Optimizing AWS Glue and Spark performance

Requirements:
- Experience with Scala programming language
- Familiarity with AWS Glue and Spark
- Proficient in optimizing performance for large-scale data processing

Please note that I already have a Scala Glue and Spark environment set up on AWS. The data size that needs to be processed is not specified, but it is expected to be large.