Koray Eker

About Koray Eker

Data Analyst with 7+ years of experience turning complex datasets into business impact. Proven track record at Freddie Mac and Verizon delivering measurable outcomes — from 50% efficiency gains to 25% improvements in data quality. Proficient in SQL, Python, R, Power BI, and Tableau, with hands-on experience in cloud platforms including BigQuery and Snowflake. Experienced in delivering results in remote and hybrid environments.

Experience

1. Data Analyst

   Freddie Mac

   Mar 2022 — Present

   Improved overall efficiency by 50% by creating easily accessible Excel documents, powered by custom Excel macros. These macros automated repetitive tasks such as data cleaning, data transformation, and report generation, resulting in streamlined processes and time savings. By ensuring consistency and accuracy in data manipulation, the macros contributed to a significant 30% increase in data quality assurance. • Created and maintained interactive dashboards and reports using Power BI, effectively communicating insights to stakeholders and resulting in a 20% increase in data-driven decision-making across the organization. • Utilized Excel extensively as a primary data analysis tool for data cleansing, manipulation, and modeling, and analyzed complex data sets using R programming language, resulting in improved data quality and increased efficiency in data processing workflows. • Conducted data profiling and cleansing to ensure data accuracy, completeness, and consistency, resulting in a 25% improvement in data quality assurance. • Developed and maintained ETL processes using PL/SQL, resulting in a 15% increase in data quality and availability.

Education

• Anadolu University

  Bachelor of Science, Business/Commerce, General