Back-end services work with mobile and web applications. We provide reliable, documented, high-level code (mainly on Java). They can be SaaS (Software as a Service) and BaaS (Backend as a Service). Lots of startups choose SaaS. It runs on cloud. BaaS provide API and additional services like storage, Analytics, Push notifications, dashboards, social integration. BaaS is highly recommended for fast development with a stable backend.