Oleksandr Y.

👋 Hello! I’m Oleksandr (Alex) — a seasoned Python developer with 6+ years of experience delivering not just web-scraping solutions but full end-to-end data services, backend systems and automation workflows for e-commerce, marketing, research, fintech and more. 🚀 What I Can Do for You 🕸️ Custom Web Scrapers & Crawlers • Scrapy, BeautifulSoup & Selenium pipelines • Rotating proxies, headless browsers • Scalable for single pages up to thousands of URLs 🛠️Data Engineering & ETL • Design and implementation of robust ETL pipelines • Data warehousing (SQL/MySQL), schema design & optimization 🐍Backend Development & API Integration • Flask & FastAPI microservices for data ingestion & delivery • RESTful / GraphQL endpoints, OAuth2 / JWT authentication • Third-party API integration (payment gateways, CRMs, social media) 📊Data Cleaning, Analysis & Visualization • Pandas / NumPy pipelines for transforming raw dumps • Custom dashboards and reports (Matplotlib, Excel/CSV exports) • Insights generation and KPI tracking Machine Learning & Predictive Modeling • Regression (Lasso, Ridge), Classification (k-NN, SVM, Naive Bayes) • Clustering (KMeans), recommender systems basics • Model evaluation and deployment (GridSearchCV, CI pipelines) ✅ Why Choose Me? ✔ Full-Stack Expertise: From data pipelines to APIs to deployment ✔ Reliable Delivery: Clear milestones, thorough documentation ✔ Quality Code: Maintainable, tested, and version-controlled ✔ Collaborative Approach: Agile mindset, regular updates and feedback loops