Math-part: basic maths, linear algebra, mathematical analysis,probability theory, statistics, discrete mathematics, differentialequations and mathematical physics.

DB-part: SQLite; MySQL; Microsoft SQL Server, PostgreSQL,mongoDB;

Excel: basic formulas; text processing; date processing; advancedexcel(IF; MATCH; INDEX; PMT; etc...); LOOKUP group(VLOOKUP;HLOOKUP; XLOOKUP); pivot tables; power query; power pivot; graphs;

Python-core: basic python; advanced python(set,frozen set, dict, lambda, etc..); patterns; OOP; abc.collection;

DS stack: numpy; skipy; pandas; sklearn; XGBoost; TensorFlow;

Visual-stack: matplotlib; seaborn; plotly;

Back-end: Flask; FastAPI; sqlalchemy;

AI-stack: BS4; LlamaIndex;

ML-part: supervised learn.(regressions and classifications);clustering; dimens. reduction; anomaly detection; NLP; Time Series;

C++ part: basic C++; threads; STL;

Diff.: Power BI; Microsoft office; Google Docs; Microsoft 365; VSC;Github; Azure;