How do I hire dedicated back-end developers in India? What is Backend Development? Backend Development is also known as server-side development. It is all that the clients don't see and contains in the background activities that happen when playing out any activity on a website. It centers fundamentally around data sets, backend rationale, APIs, and Servers. The backend of a website is a mix of servers, applications, and data sets. Code composed by backend developers assists programs in speaking with the data sets and storing information into the data set, reading information from the data set, updating the information and erasing the information or data from the data set.