RAMAZAN POLAT
Istanbul
Summary
Data Engineer with 3 years of experience building ETL pipelines and optimizing SQL analytics in the energy sector. Skilled in replacing cron jobs with Apache Airflow for automated workflows, improving efficiency. Experienced in query optimization, database upgrades, and BI performance tuning to deliver timely, cost-effective insights.
Overview
3
3
years of professional experience
1
1
Certification
Work History
Data Engineer
Vitus Commodities
09.2022 - 08.2025
- Built and orchestrated Apache Airflow ETL pipelines, reducing manual effort by 25%.
- Developed event-driven, near real-time data pipelines for automated Power BI refreshes.
- Contributed to MySQL 5.7 to 8.0 migration, including performance tuning and optimization.
- Reduced query execution times by 20% through SQL and index optimization.
- Cut database storage usage by 50% via historical data archiving.
- Reduced Python service memory usage by 30% and lowered AWS infrastructure costs.
IT Intern
BHL Turkey
03.2022 - 08.2022
- Resolved backend bugs and contributed to minor feature development.
- Supported senior developers and gained practical experience.
Education
Bachelor of Science - Computer Engineering
Izmir Institute of Technology
Izmir, Turkiye2 2024
Skills
- Data Engineering: ETL/ELT, Data Modeling, Incremental Loads
- Analytics Engineering: dbt (models, tests, snapshots, documentation)
- Big Data & Streaming: Apache Spark (Spark SQL, Structured Streaming)
- Orchestration: Apache Airflow
- Programming & Querying: Python, SQL
- Cloud & DevOps: AWS (S3, RDS, EC2), Docker, Linux, Git
Certification
AWS Certified Solutions Architect – Associate
IBM Data Engineering Professional Certificate
Languages
English
Professional Working
Timeline
Data Engineer
Vitus Commodities
09.2022 - 08.2025
IT Intern
BHL Turkey
03.2022 - 08.2022
Bachelor of Science - Computer Engineering
Izmir Institute of Technology
References
Erkin Tekeli — Former CTO, Vitus Commodities (Contact information available upon request)
Burcu Uşun — Former DBA, Vitus Commodities (Contact information available upon request)