Sergi J.

I build data systems end to end: ETL pipelines, web scrapers, dashboards, and AI-powered search (embeddings, vector databases, RAG). 10+ years in data science and engineering, most of it at Bank of Georgia — Airflow-based ETL and migration pipelines, credit risk models (xgboost), NLP for customer feedback analysis, and full-stack internal tools (Flask, Django, React). Earlier, I optimized 24/7 call distribution for Georgia's national emergency center using queueing theory. On Upwork: 11 completed jobs, 5.0 rating, 800+ hours, $60K+ earned. Projects include a kNN vector search system, a large-scale hashing & clustering pipeline (AWS, Postgres), real-time trading dashboards (Dash, Bokeh), and Selenium-based data collection. A client wrote: "He demonstrated his expertise in using Python and Selenium for real-time data collection... His user interface design was intuitive." What I take on: • Data pipelines & ETL — Airflow, Python, Postgres, AWS • Web scraping & monitoring — Selenium/Playwright, scheduled jobs with alerts • Dashboards — Dash, Bokeh, real-time data visualization • AI search & retrieval — vector databases, embeddings, RAG over your documents or data MSc in Mathematics. I write simple, explicit code that someone else can maintain — no clever abstractions. I respond fast and deliver working systems, not prototypes.