Open to opportunities

Геннадий Антонов

@0003505

Message

SQL Server Developer and Data Engineer optimizing ETL/DWH and T-SQL for critical operations.

Uzbekistan

Message

What I'm looking for

I’m looking for a role where I can optimize critical T-SQL performance, build reliable ETL/DWH pipelines, and integrate systems via REST APIs—while using Python/FastAPI to ship practical automation and reporting that improves real operations.

I’m a SQL Server Developer / Data Engineer with 6+ years of experience building and optimizing MS SQL Server databases for a nationwide pharmacy retail network (150+ locations). I focus on turning complex business data into reliable systems that teams can trust day after day.

I designed and maintained 400+ T-SQL stored procedures and functions, and I built ETL / DWH processes including data marts and automated reporting. By using query optimization and execution plan analysis, I cut business-critical report runtimes from minutes to seconds.

I also integrate payment, delivery, and loyalty systems through REST APIs and support production operations with strong SQL diagnostics (including SQL Server Profiler). Beyond SQL, I build backend tools using Python and FastAPI, including reporting services and automation with Telegram bots.

Experience

Work history, roles, and key accomplishments

Current

Database Developer / Data Engineer

Current

Asklepiy Distribution

Jan 2023 - Present (3 years 6 months)

Develop and maintain the MS SQL Server backend of the core retail and warehouse system, including database design, stored procedures, indexing, and query optimization across 150+ pharmacies. Build and support ETL/DWH processes, automate reporting, optimize business-critical report runtimes, and integrate payment, delivery, and loyalty providers via REST APIs.

MS SQL Server T SQL Stored Procedures Functions Views Indexing Query Optimization Execution Plan Analysis ETL Data Warehouse (DWH)Data Marts REST APIs JSON XML Python fastAPI SQLAlchemy Aiogram Web Scraping

SQL Developer (MS SQL Server)

Asklepiy Distribution

Sep 2019 - Dec 2022 (3 years 3 months)

Designed, developed, and maintained 400+ MS SQL Server stored procedures and functions for business logic, reporting, data processing, and operational workflows. Provided production support across the retail cycle using SQL Server Profiler and maintained the Delphi-based enterprise UI layer on top of the SQL Server backend.

MS SQL Server T SQL Stored Procedures Functions Production Support Delphi Sales Inventory and Returns Data Processing