I don't know what you already know but here are some suggestions. node.js, express, hapi are all good to learn. Knockout (knockback), Angular would also be go

I don't know what you already know but here are some suggestions. node.js, express, hapi are all good to learn. Knockout (knockback), Angular would also be good to add to that list. golang is something I am personally working to get better at in 2015. I am not sure which frameworks inside of Go would be best to learn but I am curious to see what others suggest to you as well. ansible (or puppet, chef etc). Even if you don't do devops as a job. I learned (still am finding new uses) Ansible this past year and it helped me understand more about the challenges of deploying what I build in an automated and scalable way. I have also been picking up Lua as it is pretty powerful, but I am by no way totally proficient yet. Also, not necessarily a language/framework to learn but something I think that is worth learning. Lucene queries, I went the Elasticsearch route, but Solr or others are just as viable. But between ELK and loading our data into Elasticsearch to handle the searching needs of our application really helped us solve things faster and easier. But at least for me, getting the query side of Lucene down took some effort.