● As a team member of the Report System department was responsible for the seamless delivery of data to the data warehouse from multiple ERP, CRM, HR systems, as well as internal accounting and planning systems across all countries where the company operates (USA, Canada, United Kingdom, France, Germany, Cyprus). ● Development of new and enhancement of existing ETL pipelines according to specifications. ● Participation in regular monthly accounting period closings and quarterly asset revaluations. Achievements: ● Optimization of key data warehouse entities load performance by 50% to 300%. ● Development and deployment of an incremental ETL solution for loading transactional data. ● Participation in the development of a full-cycle reporting solution for an external client (dbt, Snowflake, Tableau).

● Snowflake, Databricks, dbt, SQL Development based on business requirements for various business entities, developed data delivery and reporting solutions, query performance tuning, Data Modelling tasks.

● Worked with SSAS related to multidimensional cube maintenance and development. ● Collaborated with business analysts to contribute to the design and architecture of the desired technical solution. Elaborated on technical approaches, suggested appropriate technologies, and provided insights into how the requirements can be implemented efficiently. ● Supported the business by developing the necessary database infrastructure to enable the launch of new products. ● Created a solution for delivering the data for marketing analysis. ● Contributed to and maintained technical documentation, provided detailed descriptions of the implemented features and system architecture. Achievements: ● Developed DWH (sources, layers, datamarts), programmed objects (procedures, functions, packages) according to technical design and ETL procedure. ● Improved OLAP-cube processing. Improved SQL-scripts and SSIS-packages performance to minimize downtime and ensure smooth operations during periods of growth (reduced cube processing incidents by 300 percent). ● Implemented data quality metrics. ● Provided performance tuning by queries optimizing and tables partitioning (increased the daily advertisement costs efficiency by 200 percent). ● Changed the loading of tables from full to incremental (increased daily update pipeline speed by 5 times). ● Transferred the team development process to Git (reduced deployment time by 30 percent). ● Developed data delivery solution for analyzing the profitability of the bank's products. ● Solved the problem of organizing an infrastructure platform for developing the tasks of the Data Science team. ● Developed ETL procedures. Built a warehouse with general personal and credit metrics based on transactional activity. ● Developed complex (150 metrics) solution for analyzing corporate business outflow.

● Supported business users on projects from different sectors: logistics and retail sector. ● Supported internal SQL developer team while building up knowledge in database optimization, performance tuning, and data migration (MSSQL). ● Fixed performance problems, made ad-hoc queries, reporting solutions. ● Ensured uninterrupted round-the-clock operation of the WMS and conveyor system. Achievements: ● Developed DWH and programmed objects (procedures, functions). ● Developed ETL procedures and packages (SSIS, Python, over 30 sources). ● Developed SSRS reports and data marts according to technical design, unified datasets for business analysts, managed data schemas for granting access. ● Developed OLAP Tabular models (SSAS, client’s bonus model calculating, client’s clusters). ● Provided performance tuning by optimizing queries.

● As a consultant: Participated in the full cycle implementation of the ERP ERA Financials (KAZAKHMYS Corporation, three sites). Participated in and supported the implementation of Oracle Hyperion. ● As project manager: Participated in the full cycle implementation of BOSS Kadrovik system (HR management and salary calculation modules) in Vimm-Bill-Dann Company (two sites). ● Developed reports (TSQL, Crystal Reports), participated in closing regular accounting reporting period