Languages and Frameworks
- JavaScript / jQuery
- HTML5 / CSS3 / LESS
- Node.js
- AngularJS / Meteor
- Ruby / Rails
- Python
Testing
- Protractor
- Mocha / Chai
- PhantomJS / CasperJS
- Jasmine
- Cucumber / RSpec
Databases and Caching
- MongoDB
- Cassandra
- Redis
- ElasticSearch
- PostgreSQL
Infrastructure and Network
- Linux
- Switching and routing
- IPv4 / TCP / UDP / HTTP
- SSL / TLS
- Shell scripting
- Rake / Grunt / Gulp
- How to setup a CI environment
- GitHub
- Amazon AWS, S3, RDS, BeansTalk, SNS/SES, etc
- Puppet / Chef / Ansible
- Docker
- HAProxy / nginx
Originally appeared on Quora.