For front-end in our projects we use tools like Bootstrap, SASS and CoffeeScript to create beautiful design and interactive interface. In more advanced SPA projects Ember.js and Vue.js help us provide amazing user experience.
Our back-end experts use the power of Ruby on Rails and Node.js with PostgreSQL or MongoDB as database, depending on project’s specification. With minor tools as Redis or Sidekiq we create the most powerful ever.
Code in application isn't everything. It requires best hardware and network for it to be accessible everywhere as fast as possible. We use DigitalOceans infrastructure with Cloudflare CDN to store out projects and provide best performance.