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Chepak Maksym
City: Kyiv
Mobile/Telegram/WhatsApp: [открыть контакты](см. выше в блоке «контактная информация»)
LinkedIn: /maksym-chepak
Email: [открыть контакты](см. выше в блоке «контактная информация»)

PROFESSIONAL SUMMARY

Database Engineer with 10+ years of experience designing, optimizing, and migrating large-scale data
platforms. Specialized in MySQL, PostgreSQL, and MS SQL Server performance tuning, query optimization,
database architecture, and business intelligence solutions. Proven track record of resolving bottlenecks in
high-load systems, leading multi-million-record migrations, and partnering with engineering teams to improve
scalability, reliability, and operational efficiency.

CORE COMPETENCIES

Database Architecture | SQL Optimization | Performance Tuning | Data Migration | ETL | BI & Analytics
| MySQL | PostgreSQL | MS SQL Server | AWS RDS | Grafana | Power BI | Qlik Sense | SSIS | Git

PROFESSIONAL EXPERIENCE

ITRDev
Database Engineer 07.2023 – Present

• Manage and optimize MySQL, PostgreSQL, and SQLite database architectures to support high-
traffic PHP and Node.js backend systems.
• Restructured database primary keys from UUID to BIGINT for high-traffic environments, significantly
enhancing query performance and resolving complex SQL optimizer execution inefficiencies.
• Led large-scale historical data migrations involving multi-million-record datasets to specialized
internal microservices, successfully identifying and eliminating filesystem read bottlenecks.
• Analyze and debug complex database configurations utilizing Grafana, AWS RDS, and Firebase.
• Optimize complex backend queries in close collaboration with the development team to reduce
server load and improve response times.
• Design, develop, and publish comprehensive data analytics dashboards using Power BI.
• Conduct thorough code reviews and maintain strict version control using Git.
Regional Gas Company - RGC Digital
Middle/Senior SQL Developer 08.2020 – 07.2023

• Administered MS SQL transit databases, focusing on script optimization and restructuring database
schemas for better efficiency.
• Successfully executed the end-to-end migration of highly loaded databases from MySQL to MS SQL.
• Troubleshot and debugged core database configurations to ensure maximum uptime.
• Developed advanced analytical reports and interactive dashboards in Power BI to support business
decision-making.
• Ensured code quality through regular code reviews and version control management using Git.

ABM Retail Consulting
Middle SQL Developer 05.2017 – 08.2020

• Administered and maintained MS SQL transit databases, executing script optimizations and
structural improvements.
• Engineered and maintained seamless data synchronization processes between MS SQL and
PostgreSQL databases.
• Created complex operational reports and fixed configuration errors through deep analytics.
• Built and deployed sophisticated BI analytics using both Power BI and Qlik Sense.

Earlier Experience (2013 – 2017)
Technical Support Specialist & Junior Developer Roles

• Gained foundational experience in database troubleshooting, software deployment, business
application support, and automated device control programming (Java) across various IT
consulting and development firms.

EDUCATION

National Technical University of Ukraine "KPI", Faculty of Engineering and Physics, Powder Metallurgy.
Kyiv.

TECHNICAL SKILLS
 • Databases: MySQL, PostgreSQL, MS SQL Server (T-SQL), SQLite, AWS RDS
• Data Engineering & BI: ETL, SSIS, SSRS, APScheduler, Power BI, Qlik Sense, Grafana,
ProxySQL
• Programming & Tools: Python (FastAPI, SQLAlchemy), Core Java, Git, ODBC, JDBC,
Firebase, JSON
• AI-Assisted Development: Cursor, Claude Code, Gemini, Google Antigravity

LANGUAGES

Ukrainian - Native | Russian - Fluent | English - Intermediate.

ADDITIONAL INFORMATION

• Pet Project: Prozorro Medical Data Pipeline – Built an async Python crawler (FastAPI,
APScheduler, PostgreSQL) to ingest and structure public procurement data via API.
• Hobbies: mountain biking and snowboarding.