The role that you need to play as a AWS Infrastructure Engineer are as follows:
Deal with Linux administration.
Responsible for product deployment and CI/CD tools like Jenkins.
Automating cloud infrastructure such as with cloudformation, ansible, etc.
Work on cloud security such as managing users, roles and privileges through IAM.
Managing Atlassian tooling such as Jira and Confluence.
Deploying and managing a wide range of components that support web applications such as nging, apache http, git, scripting (bash, perl, python, etc.), databases (mongodb, PostgreSQL, etc.)