Dear Aspirant,

a data engineer is a person whose profession is to build and install the data systems. These systems fuel machine learning and AI analytics. They also develop information processes for a whole host of data tasks. These include data acquisition, data transformation, and data modeling, among others.

Whereas, a big data engineer, whose profession is to, create and manage a company's Big Data infrastructure and tools, and is someone that knows how to get results from vast amounts of data quickly. The actual definition of this role varies, and often mixes with the Data Scientist role.