The mostly asked skills for the job of a AWS Infrastructure Engineer are as follows:-
Solid hands-on working experience with configuring and maintain resources in AWS.
Experience with majority of the AWS services - EC2, ELB, Cloud formation, S3, Codedeploy, SNS, RDS, IAM, etc.
Hands-on experience in virtualization and experience with docker.
Hands-on experience with Linux administration.
Expertise with production deployment and CI/CD tools like Jenkins.
Experience automating cloud infrastructure such as with cloudformation, ansible, etc.
Experience with cloud security such as managing users, roles and privileges through IAM.