Programming Language:

Python

Basic C++

SQL

Machine Learning:

CatBoost

Scikit-learn

XGBoost

LightGBM

Data processing and visualization:

Pandas

Matplotlib

Seaborn

NumPy

Deep Learning:

PyTorch

Tensorflow (a little bit)

Math:

Linear algebra

Probability theory and statistics

NLP:

Transformers

Computer Vision:

OpenCV

PyTorch