Beytullah Orhan

CRM&Customer Analyst at Alternatif Bank (2025-10 – Present)

Worked with large-scale customer datasets using SQL and Python for analytics and reporting processes.
Performed data cleaning, preprocessing, transformation, and feature preparation for machine learning–based analytics projects.
Developed customer segmentation and target audience datasets for analytical and campaign-focused studies.
Built Power BI dashboards and KPI tracking reports for customer activity and product usage analysis.
Conducted data validation and quality checks including null, duplicate, and consistency controls.
Supported predictive analytics and customer behavior analysis using SQL, Python, Pandas, and Power BI.

Backend & Database Developer (Part-Time) at Eltagron (2024-02 – 2025-02)

Contributed to a TÜBİTAK-supported ASP.NET project, playing a key role in stabilizing and recovering a mission-critical system.
Continued as a part-time backend developer, taking on increased technical ownership.
Led backend development and database design, building scalable system architecture.
Designed and maintained PostgreSQL databases, including normalized tables and reusable schemas.
Developed backend services and APIs using Flask and Django.
Acted as technical team lead for ~10 interns and collaborated with stakeholders to translate business needs into backend and data models.

Finance & Operations Vice President at AIESEC (2022-02 – 2023-02)

Managed financial reporting, budgeting, auditing and sponsorship operations, ensuring accuracy and compliance with internal guidelines.
Prepared and reviewed periodic financial reports, tracking expenses, revenues and budget performance.
Collaborated with international teams and external stakeholders in a multi-country, cross-functional environment.
Supported financial planning and decision-making by providing structured reports and data-driven insights.
Strengthened analytical thinking, reporting discipline, stakeholder communication and leadership skills.

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