Sergey Fomichev

Sportmaster is one of the three largest sporting goods retailers in Europe with 210MM offline visitors a year and a huge online customer base. • Working on improving search relevance and increasing financial result of the search engine using ML approaches • Developed and implemented ML-based autosuggest API • Developed and implemented item ranking personalization in catalog branches • Developed and implemented automated pipeline of dataset labeling for assessing search relevance using crowdsourcing platform

• Developed and implemented system for optimizing marketing communications using Uplift models • Developed and implemented recommender systems based on Deep Learning approaches • Implemented pipeline for preparing product embeddings based on purchases, text descriptions, images • Implemented pipeline for extracting product tags using CV, NLP (NER) • Conducted A/B tests before implementations

MegaFon is the second largest mobile operator in Russia with 75.4 million customers. Worked on solving business problems and implementing prototypes: • Improved the Churn prediction model • Developed predictive model for client gender • Developed classification model for Down-sale prediction • Prepared various triggers to stimulate top up, prevent the churn

Project in Aeroflot (the largest airline in Russia). • Unified client profile model (UCP) - comparison of user data from different sources(Oracle DWH, GA, Siebel, Check-In system, social networks) using near-duplicate detection algorithms • Client LTV forecasting • RFM segmentation • Developed and implemented recommender system for email personalization

SAP BI implementation projects in Federal Grid Company (operator and manager of unified electricity transmission grid system in Russia), MOESK (major distribution electric grid company in Russia) • Implemented wide range of management reports for desktop and mobile devices to support decision-making in investment activities • Reporting, Data warehouse modeling (SAP BW), ETL, ABAP development

SAP BI implementation projects in FINN FLARE, Incity, SELA (large Fashion Retail companies in Russia), Euroset (large mobile phone retailer) • Implemented management reports and KPI dashboards for managers of different levels, Data warehouse modeling (SAP BW), ETL

SAP BI implementation projects in NLMK, Gazprom (major natural resource company in Russia) • Implemented dashboards for executives, Data warehouse modeling (SAP BW), ETL, SAP BO