AWS tech stack required for the project
Primary focus is on Glue, S3, Redshift, Lambda, PySpark, Spark. Then added skillset which could add value are AWS Step function, NoSQL DB like Dynamo DB and AWS Data Migration Service in that order of priority
Data engineer should have atleast 2 years of relevant AWS experience with their services mentioned above. For senior data engineer the person should have atleast 3 to 4 years of experience on the tools
Experience in data security or governance and performance improvement is an added benefit
Key skills:

AWS, S3, GLUE, REDSHIFT and pyspark