Максим Ефимов Email and Phone Number

I completed 13 educational projects in various fields:• Banking - determining the share of creditworthy customers;• Real estate - features of real estate market objects (city and region);• Gaming industry - sales of games on different gaming platforms (1980-2015);• E-commerce - clustering, A/B testing in a large online store;• Mobile applications - sales funnel and A/B testing in the application.Several work examples are presented on… Show more I completed 13 educational projects in various fields:• Banking - determining the share of creditworthy customers;• Real estate - features of real estate market objects (city and region);• Gaming industry - sales of games on different gaming platforms (1980-2015);• E-commerce - clustering, A/B testing in a large online store;• Mobile applications - sales funnel and A/B testing in the application.Several work examples are presented on GitHub:https://github.com/MaksimEfimovR/Portfolio.Tools and technologies:• Descriptive statistics;• Metrics and funnels;• Cohort analysis;• Unit economics;• SQL queries (PostgreSQL);• A/B testing;• Jupyter Notebook, Google Colab using python, libraries:pandas, numpy, pyplot, seaborn, plotly, scipy, sklearn;• Dashboards in Tableau;• Google Presentations, MS PowerPoint.Basics of machine learning (understanding ML principles):classification, regression, clustering.Basics of script writing and pipelines (Python). Show less

Power Grid Control Center Specialist• Development, annual coordination, and release of current electric grid schematics;• Interaction with power system entities (generating and grid companies, electricity consumers, government agencies, system operator);• Development and update of work instructions, methods, regulations (3 regulations per 1000 users, about 5 instructions and methods);• Training of operational and maintenance personnel to work with software systems (up to 50… Show more Power Grid Control Center Specialist• Development, annual coordination, and release of current electric grid schematics;• Interaction with power system entities (generating and grid companies, electricity consumers, government agencies, system operator);• Development and update of work instructions, methods, regulations (3 regulations per 1000 users, about 5 instructions and methods);• Training of operational and maintenance personnel to work with software systems (up to 50 people);• Implementation and administration of software systems, formalization of rules for entering information into the database (automated management system for repairing energy equipment);• Calculation a reliability index by electric power utilities (SAIDI, SAIFI);• Development of automated reports, their implementation, and maintenance (~10 universal reports for 150 users);• Preparation of monthly/annual analytical reports on the implementation of the repair campaign;• Development of technical specifications, approval of technical projects for the development of software products.I automated daily reporting on the state of 6-110 kV power grids, reducing preparation time by 20-40%.I prepared a technical and economic justification for the cost-effectiveness of implementing a repair planning software system, which paid off in 2 years of use, by reducing the amount of electricity not supplied (loss of revenue).The implementation of the system improved planning quality: reduced the time for generating schedules by 50%, reduced equipment downtime, and increased data availability on repairs conducted for related departments.Letter of appreciation from Bashkirenergo LLC for outstanding achievements and conscientious work in 2015. Show less