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As Head of Business Intelligence, I lead the development and implementation of all BI strategies and processes, including personnel management.

• Built BI infrastructure from scratch, growing the team from 0 to 14 members in 14 months and expanding BI solution coverage to over 50 business units.
• Developed 400+ reports and managed vendor licensing negotiations, scaling to 1000+ users within 18 months.
• Created internal Tableau Server monitoring system with 12 dashboards, resulting in 65% increase in user engagement and 80% automation of report refreshes.

Led the BI initiative within the data department, creating Tableau as a product offering from scratch, focusing on adoption and growth within the company.

• Created comprehensive BI style guide and standardized DEV/UAT/PROD processes.
• Automated report refreshes via Apache Airflow DAGs, ensuring 100% data freshness for 50+ dashboards.

• Designed an extensive Tableau training course with 16 lessons, guiding students from introductory to intermediate levels.
• Conducted 100+ webinars for 100+ students, evaluated their homework and projects.

Conducted training for BI teams and educated employees on effective Tableau use as a mentor and consultant on platforms including adplist.org and getmentor.dev.

• Developed an upskilling program to enhance mentees' skills and guided junior devs.
• Provided consultation on Tableau implementation, helping companies overcome data analysis and visualization challenges.

• Created and optimized 20+ reports, managed Tableau Server Administration and contributed to BI style guide development.
• Implemented a User Management Report using Tableau REST API and Python, resulting in identification of 50+ underutilized accounts and irrational usage of 5+ data sources.

• Handled diverse tasks including collaborating with business stakeholders, preparing data sources and developing Tableau reports covering 400+ end-users with my products.
• Supported 5 internal departments by creating and maintaining BI tools (20+ dashboards) to enhance performance.
• My leadership included conducting ~20 technical interviews, mentoring and onboarding new team members, leading sprint planning and tech reviews for a team of 12 analysts.

As a full-stack Tableau developer, I achieved the following:

• Developed and delivered 20+ high-impact Tableau reports, including designing dashboards, integrating interactive elements, managing row-level security, preparing of data sources in SQL and presenting dashboards to 50+ end-users.
• Streamlined Tableau Server administration, managing permissions for ~3000 users, creating auto-updated user groups and optimizing background tasks for improved performance.

As part of the Sales & Marketing and Airport Operations teams, I led the comprehensive development of the regional office, where I achieved:

• Built 3 reports using MicroStrategy DWH, Midas, and Power BI to conduct competitor analysis, uncovering 10–15% fare adjustment opportunities that boosted profitability by 12% and passenger traffic by 8%.
• Generated an operational performance report that identified flight delays caused by handling companies' organizational issues, enabling SLA negotiations that reduced service costs for Turkish Airlines by 15% and improved on-time performance.
• Awarded first place twice in the Corporate Innovation and Projects Directorate for valuable ideas, with a total of 7 submitted ideas.
• Trained 5 new employees, enhancing team skills and operational efficiency.