If you're looking to become a Facebook Machine Learning Engineer, you'll need to have a strong grasp of math and algorithms, as well as advanced programming skills. The programming language necessary for this position is Python, as it is one of the most popular languages used in machine learning and data science today.
Developing strong algorithms is essential to the job, so being familiar with linear algebra, calculus, probability theory and statistics is a must. Additionally, writing efficient code that can process large datasets quickly is key to success in the field. Knowing how various data structures work and how to write optimized code will give you an edge over other applicants.