I have good experience in Configuration management tool Chef.
I have written cookbooks which installs and configures mongoDB, Nginx, Apache, tomcat, zabbix, newrelic and many more. I have also deployed nodejs, java applications using cookbooks.
I have worked on AWS EC2, VPC.
I have not worked on OpsWorks. I think OpsWorks also uses chef server to automate workflows.
Since i have worked extensively on chef. I understand configuration and deployment very well.