Osman Büyükyılmaz
Data Analyst
İstanbul
Summary
I have experience working on large and complex data. I can write complex SQL queries and perform important analysis to analyze big data. I can make models with big data and draw meaningful conclusions. I can use data visualization tools at an expert level and visualize data.
Overview
10
10
years of professional experience
1
1
Language
Work History
Freelence Data Analyst
Freelence
07.2024 - 07.2025
- Developed and optimized algorithmic cryptocurrency trading bots using Python by analyzing real-time exchange data (price, volume, etc.).
- Created and implemented trading strategies for bots to make automated buy/sell decisions based on real-time market analysis.
- Managed the backtesting process for developed bots, evaluating their performance under various market conditions to improve profitability and efficiency.
- Automated data collection, cleaning, and analysis pipelines to streamline the bot development lifecycle.
- Utilizing AI to optimize and accelerate code development processes.
Data Analyst
Rhenus Logistics
12.2023 - 06.2024
- Proficiency in Power BI Desktop and Power BI Service
- Strong understanding of DAX (Data Analysis Expressions) language
- Analyze data with Power BI and create meaningful visualizations
- Design and develop interactive dashboards and reports in Power BI
- Utilize Power BI to customize reports, meeting user requirements and business goals
- Share and present reports and dashboards within your organization using Power BI.
- Expertise in data modeling and visualization techniques.
- Ability to write SQL queries.
Sales Data Analyst Team Lead
Delivery Hero / Yemeksepeti
01.2022 - 07.2023
- Planning and directing the team to ensure timely project delivery
- Creating user-friendly reports and dashboards for end-users using Tableau and Looker Studio tools
- Performing data analysis with large datasets by writing complex SQL queries to meet the needs of the sales team
- Analyzing data to determine sales models and forecast future sales
- Automating data processes to reduce repetitive tasks and save time for the sales team
- Testing data accuracy and consistency, Identifying data-related errors and working with the Business Intelligence Department to rectify them
- Contributing to the creation of weekly, monthly, and annual KPIs
- Organizing training sessions within the sales department for data interpretation and implementation in the context of data democratization
- Collaborating with global teams to provide data-focused support for global projects and product development
VAS Sales Support Team Executive
Delivery Hero / Yemeksepeti
07.2021 - 12.2021
VAS Senior Sales Support Specialist
Delivery Hero / Yemeksepeti
11.2020 - 07.2021
VAS Sales Support Specialist
Delivery Hero / Yemeksepeti
11.2016 - 11.2020
Sales Consultant
Sigortam.net
08.2015 - 04.2016
Education
International Relations
Trakya University
06.2014
High School - undefined
Davutpaşa
05.2009
Skills
- Microsoft Office Excel
- SQL
- Big Query
- Looker Studio
- Tableau
- Python
- Power BI
- Data visualization and presentations
- Project management
- Data cleaning and validations
- Data storytelling
- Data analysis
- ETL processes
References
Ferhat İşyapan, Data Director, Bitaksi, 0505 627 45 98
Interests
Chess, Solving Rubik's Cubes, Table Tennis
Training
- Big Data and Business Analytics Specialist Certificate, Istanbul Technical University
- Data Analysis with SQL
- Creating Projects with Machine Learning
- Data Modeling with Python
- Data cleaning and validations
Timeline
Freelence Data Analyst
Freelence
07.2024 - 07.2025
Data Analyst
Rhenus Logistics
12.2023 - 06.2024
Sales Data Analyst Team Lead
Delivery Hero / Yemeksepeti
01.2022 - 07.2023
VAS Sales Support Team Executive
Delivery Hero / Yemeksepeti
07.2021 - 12.2021
VAS Senior Sales Support Specialist
Delivery Hero / Yemeksepeti
11.2020 - 07.2021
VAS Sales Support Specialist
Delivery Hero / Yemeksepeti
11.2016 - 11.2020
Sales Consultant
Sigortam.net
08.2015 - 04.2016
High School - undefined
Davutpaşa
International Relations
Trakya University