Python is free and open-source. It has awesome collection of inbuilt libraries like NumPy, Scikit-learn, Panda, SciPy and Pybrain etc. for machine learning and data analysis purpose. It is easy to intigrate and create prototypes which is very useful for product prototyping.

TensorFlow, an open-source machine learning concept, offers a very high level and abstract approach  to organizing low-level numerical programming. It has awesome graphs, library management, debugging, scalablity and pipelining features.

Java is a pure object-oriented that helps to create any of the programs into small modules. Java is platform in-dependency and it ensures major security issues like all the codes and work are secure enough.

SQL is portable, can easily move database using sql from one device to other. It has well defined standards and interactive languages. It has multiple data views, users can make different views of the database structure for the different users.