Python is the preferred programming language for data scientists, with extensive libraries that aid in all aspects of data science including NumPy, pandas and scikit-learn, with it having the largest amount of machine learning libraries. As it is the most widely used language for data science, hiring in this area will be easy. As our backend will be using Django API which is optimized to be used with Python, thus making it the best choice for integrating the backend.

We will be using pytest for our different unittest and integration test for our Django and Python-based code, giving us sufficient coverage for our backend.