Full Tech Stack

Language: Web Frameworks

PHP: Symfony, Zend, CodeIgniter, Cakephp, Yii, Magento, Laravel
Ruby on Rails
Golang
Node.js: express
MeteorJS
Java: SpringFramework
Kot
Play! with Scala Language (Java Platform)

Front End Development

HTML5
JQuery
Backbone.js
Ionic
AngularJS
KnockoutJS
EmberJS
Socket.IO
React + Redux
GraphQL

CSS Technologies

CSS3
LESS
SASS
SCSS
Bootstrap
Foundation
Semantic UI

Web/App Servers

Amazon Web Services Administration
Amazon Route 53
The AWS Elastic Load Balancer
Amazon's Simple Storage Service (S3)
Amazon Cloudfront
Apache
nginx
DigitalOcean

NoSQL Database / Key-Value Stores

MongoDB
couchDB
Redis
Memcached

Relational Database

MySQL
Postgres
SQL Server
MariaDB

API Services

Paypal
Linkedin
Facebook
Twitter
Stripe
UserApp.io
Authorize.NET
Google Maps API

Mobile Development

Swift
Objective-C
Android
Kotlin
React Native

CMS & E-Commerce

Wordpress
Drupal
Joomla
Shopify
Magento
Custom Made

Version Management

Git
SVN
Mercurial

ORMS

Doctrine
MyBatis / iBatis

Search Engines

Solr

Testing Frameworks

phpunit
Selenium
Appium
casper.js
Behat and Mink (PHP)
Cucumber and RSpec (Ruby on Rails)
jUnit

JS Technologies

Coffeescript

Architectural Practices / Concepts

REST
MVC / MV*