Sergei Leontev

IT Specialist with extensive hands-on experience across multiple areas of information technology.
My expertise includes working with various programming languages, Data Science, business and system analysis, and many other IT technologies.

I offer:
Custom task execution (olympiads, homework and assignments for school and university students);
Development of Telegram bots using Python;
Project development in multiple programming languages;
Design and development of relational databases using PostgreSQL, SQLite, MySQL, MS Access, and Oracle; SQL query development;
Training in business and system analysis from scratch.

My portfolio includes:
Over 50 Telegram bots developed in Python using various libraries;
6 large-scale information systems developed single-handedly using PHP, JavaScript, and Python;
Around 100 relational databases designed and developed from scratch;
Approximately 100 ML, Data Analysis, and Data Science models created from scratch;
4 Data Science information systems designed and developed from the ground up;

If you have any questions, feel free to contact me. I will be glad to help you achieve your goals in the world of IT technologies.