Tolga Boroglu
Data Scientist & Data Analyst
Transforming complex data into actionable insights through advanced analytics, machine learning, and statistical modeling to drive business growth and informed decision-making.
About Me
Experienced Data Scientist with 5+ years specializing in machine learning, business intelligence, and cloud-based analytics solutions. Proven track record of delivering data-driven insights that drive business growth and operational efficiency.
Data Visualization
Power BI, Tableau, Looker dashboards with actionable insights
Big Data & Cloud
BigQuery, GCP, Apache Spark for scalable data solutions
Machine Learning
NLP, predictive analytics with 99% accuracy in customer behavior
ETL & Infrastructure
Azure Data Factory, cost optimization, and reporting systems
My Approach
1. Data Infrastructure
Build scalable ETL pipelines and optimize query performance, reducing costs by up to 65%.
2. LLM Models
Leverage Large Language Models and advanced NLP techniques to build intelligent chatbots, document processing systems, and automated content generation solutions.
3. Business Impact
Create KPI-driven dashboards and reporting systems that enable data-driven decision making.
Skills & Expertise
Comprehensive technical skills and domain expertise in data science, analytics, and business intelligence
Professional Experience
My journey in data science and analytics
GENSURE TECH
Performing comprehensive data analysis and reporting across sales, accounting, task management, and insurance datasets. Built entire reporting infrastructure from scratch and developed advanced SQL queries in BigQuery.
Key Achievements:
- Reduced query costs by 65% through BigQuery optimization and GCS integration
- Created KPI-driven dashboards using Metabase for actionable insights
- Built scalable data analytics environment from ground up
- Developed advanced SQL queries supporting operations, finance, and executive teams
TEMSA
Led data preparation and integration projects involving spare parts and vehicle stock data from multiple systems into unified SQL databases. Developed ETL pipelines and Power BI dashboards.
Key Achievements:
- Integrated spare parts and vehicle stock data from different systems
- Designed ETL pipelines using Azure Data Factory
- Created Power BI dashboard for stock performance monitoring
- Managed large datasets using MSSQL with focus on data quality
UPWORK
Specialized in NLP and machine learning projects, developing text automation systems and predictive analytics models. Utilized big data tools and cloud platforms for scalable solutions.
Key Achievements:
- Achieved 86% accuracy in sentiment analysis using advanced algorithms
- Implemented predictive models with 99% success rate in customer behavior estimation
- Developed text and document automation systems using NLP
- Leveraged BigQuery, Looker, and GCP for scalable data solutions
KODLASAM
Designed and delivered hands-on Python data analysis curriculum for bootcamps. Led workshops on latest data analysis techniques and provided personalized feedback to students.
Key Achievements:
- Designed comprehensive Python data analysis curriculum
- Delivered hands-on training with real-world case studies
- Led workshops on cutting-edge data analysis techniques
- Mentored students with tailored feedback and guidance
TRIVE CREDIT
Focused on business intelligence and data warehouse development, creating comprehensive reports and supporting Tableau dashboard implementations.
Key Achievements:
- Extensive report preparation using Microsoft SQL
- Created and maintained Tableau dashboards
- Supported data warehouse development initiatives
- Delivered business intelligence solutions
Featured Projects
Real-world data science and AI projects that delivered measurable business impact
Developed a comprehensive e-commerce website for Toroslardan.com with integrated n8n workflow automation for AI-powered product image generation, streamlining content creation and inventory management processes.
Key Features:
- Full e-commerce website development
- n8n workflow automation integration
- AI-powered product image generation
- Automated content creation pipeline
- Inventory management optimization
Impact & Results:
Developed a custom AI-powered chatbot tailored to client's business needs through Upwork. The chatbot handles customer queries, automates routine tasks, and provides seamless communication.
Key Features:
- Customer query automation
- Routine task handling
- Seamless communication interface
- Business-specific customization
Impact & Results:
Advanced document digitization app with edge detection, perspective transformation, and OCR for accurate text extraction. Demonstrates computer vision and mobile solutions integration.
Key Features:
- Advanced edge detection
- Perspective transformation
- OCR text extraction
- User-friendly mobile interface
Impact & Results:
Cutting-edge machine learning project converting textual descriptions into visually compelling images. Showcases AI potential in creative content generation for marketing and design.
Key Features:
- Text-to-image conversion
- Creative content generation
- Marketing applications
- Design automation
Impact & Results:
Supported website enhancement for Heritage Game, an EU-funded project preserving cultural heritage through gamification. Optimized structure and improved user experience.
Key Features:
- Website structure optimization
- Enhanced user experience
- Professional visual design
- Cultural heritage preservation
Impact & Results:
Developed matching algorithm for educational platform pairing students based on cognitive and social-emotional abilities, promoting effective collaboration and personalized learning.
Key Features:
- Student matching algorithm
- Cognitive ability assessment
- Social-emotional pairing
- Personalized learning enhancement
Impact & Results:
Contributed to MVP development for LiteFirm startup's automated task documentation tool, streamlining task tracking and documentation processes for enhanced business efficiency.
Key Features:
- Automated task tracking
- Documentation streamlining
- Business efficiency tools
- Clear record maintenance
Impact & Results:
Designed and developed a fully responsive, user-friendly website with elegant design and seamless navigation, ensuring professional and engaging online presence.
Key Features:
- Fully responsive design
- Elegant user interface
- Seamless navigation
- Professional web presence
Impact & Results:
Developed AI-based predictive models for horse racing outcomes using machine learning algorithms to analyze historical race data and generate accurate forecasts.
Key Features:
- Historical data analysis
- Predictive model training
- Performance evaluation
- Accurate race forecasting
Impact & Results:
Client Testimonials
Discover what clients say about my data science projects and professional expertise
"Tolga did an excellent job on the chatbot I requested. We had extensive discussions beforehand, and he developed the application exactly as I wanted. Upon completion, he thoroughly explained everything via a Zoom call and provided detailed explanations of the code and the tools used within the project files. He promptly assisted with any challenges I faced during setup. I am extremely satisfied with his work and would highly recommend him."
Andre
"Tolga is an exceptional professional with excellent communication skills. Working with him is always a seamless experience because he has a strong grasp of all the details and provides invaluable support whenever needed."
Elnaz
Germany
"I didn't have much knowledge about the subject, but Tolga explained a lot of new concepts to me in a very calm and polite manner while implementing them into the system. His potential is undoubtedly much greater, and I hope we get to work on many amazing projects together in the future. If you're considering working with him, Tolga is definitely the right choice—I highly recommend him."
Öznur
Turkey
"Highly skilled in his work and an excellent communicator, Tolga is a freelancer you can trust to work with confidence. I sincerely thank him for his dedicated efforts."
Candan
Ireland
"Thank you! Tolga has excellent communication skills and provides very quick responses."
Sezin
Turkey
"Tolga did a great job. He has completed the assignment very fast and accurate. Communication with him was great and he has explained his method in an understandable manner."
Buket
Turkey
Get In Touch
Ready to transform your data into actionable insights? Let's discuss your next project.
Let's Connect
I'm always interested in discussing new opportunities, data science collaborations, or sharing insights about analytics and machine learning. Feel free to reach out through any of the channels below.
Email Address: