Below you find a set of charts demonstrating the paths that you can take and the technologies that you would want to adopt in order to become a frontend, backend or a devops. I made these charts for an old professor of mine who wanted something to share with his college students to give them a perspective.
🎨 Front-end Roadmap
👽 Back-end Roadmap
For the backend, personally I would prefer Node.js and PHP 7 for the full time plus I have been experimenting lately with Go and I quite like it. Apart from these, if I have to choose another one, I would go for Ruby. However this is just my personal preference, you can choose any of the shown languages and you will be good.
👷 DevOps Roadmap
This article is to replicate the great work of @kamranahmedse from GitHub, and the purpose of replication the article to spread the work.
Thanks to Kamran