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Volodymyr – Python, Machine learning, AI, experts in Lemon.io

Volodymyr

From Spain (UTC+2)

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Data ScientistSenior
10 years of commercial experience
AI
Analytics
Data analytics
E-commerce
Gambling
Real estate
Social media
Marketplace
Lemon.io stats
2
projects done
1170
hours worked

Volodymyr – Python, Machine learning, AI

Senior Data Scientist with a solid math and statistics background, focused on solving real business problems. Volodymyr has been working on connecting the dots and interacting with people in various functions, identifying product challenges, proposing solutions, and driving sustainable product impact. Furthermore, he has proven experience in end-to-end data science projects, including requirement gathering, data extraction, model development, deployment, and monitoring.

Main technologies
Python
10 years
Machine learning
10 years
AI
8 years
Data Science
10 years
Additional skills
PostgreSQL
AWS
GCP
BigQuery
Apache Airflow
Tableau
MLOps
Apache Kafka
NLP
scikit-learn
Pandas
Docker
Redis
FastAPI
Flask
SQL Server
Tensorflow
PyTorch
Snowflake
LLM
Looker
RAG
LangChain
Airflow
Computer Vision
Big Data
Vector Databases
MLflow
Kafka
Microservices
Prompt engineering
Web scraping
Qdrant
Direct hire
Potentially possible
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Experience Highlights

Lead Data Scientist
Mar 2023 - Dec 20241 year 9 months
Project Overview

A social discovery platform.

Responsibilities:
  • Developed a conversational AI chatbot powered by a state-of-the-art LLM, enhancing customer satisfaction;
  • Led the development of an innovative search recommendation system, significantly boosting ARPU;
  • Automated critical business processes with advanced image recognition, text classification, and clustering algorithms;
  • Architected a cloud-based data platform using Airflow, dbt, and BigQuery to streamline data workflows;
  • Mentored a dynamic data science team, fostering technical growth and driving cross-functional collaboration;
  • Designed and implemented rigorous A/B testing to continuously optimize machine learning models in production.
Project Tech stack:
Python
BigQuery
Apache Airflow
Git
Tableau
PyTorch
LLM
Airflow
Computer Vision
LangChain
RAG
Vector Databases
Data Science Consultant
Feb 2022 - Apr 20231 year 2 months
Project Overview

A marketplace of rigorously vetted and curated developers.

Responsibilities:
  • Led a high-impact marketing traffic estimation project, reducing decision-making time from 20 to 5 days;
  • Developed a real-time car price estimation model that enhanced negotiation dynamics and improved conversion rates;
  • Engineered robust data platforms on GCP and AWS, significantly improving data processing efficiency and scalability.
Project Tech stack:
Python
Airflow
AWS
Machine learning
Data Science
Business intelligence
Lead Data Scientist
Aug 2019 - Jan 20222 years 5 months
Project Overview

The product provides solutions for betting and casino platforms.

Responsibilities:
  • Built and led a team of 6 data scientists, providing mentorship that accelerated product innovation;
  • Designed comprehensive antifraud solutions that resulted in an 80% reduction in fraudulent activities;
  • Collaborated with cross-functional teams to integrate machine learning solutions, achieving substantial business impact;
  • Instituted MLOps best practices, streamlining deployment and monitoring for 10+ production models.
Project Tech stack:
Python
Microsoft SQL Server
PostgreSQL
Apache Airflow
Git
Tableau
MLOps
Apache Kafka
Machine learning
Computer Vision
NLP
Big Data
Algorithms and Data Structures
Head of Data Science
Mar 2018 - Nov 20191 year 7 months
Project Overview

A real estate marketplace.

Responsibilities:
  • Built ML models for user behavior prediction and recommendation systems;
  • Created tools for CTR, CR, LTV prediction, and models for advertising campaign optimizations;
  • Developed tracking dashboards and prepared analytics reports;
  • Managed Data Science team;
  • Deployed and managed ML engines on the production.
Project Tech stack:
Python
PostgreSQL
Microsoft SQL Server
NLP
Git
Data Scientist
Mar 2017 - Mar 20181 year
Project Overview

An outsourcing company with clients from different sectors (energy demand, fin market).

Responsibilities:
  • Created and presented models and solutions for existing and potential clients;
  • Prepared project workflow and documentation;
  • Developed prediction and optimization algorithms for energy demand programs;
  • Developed the prediction of price movements in financial markets.
Project Tech stack:
Python
Machine learning
PostgreSQL
Data Scientist
Mar 2016 - Mar 20171 year
Project Overview

An e-commerce recommendation platform.

Responsibilities:
  • Developed recommendations and a scoring model for product comparison from Amazon, Walmart, eBay, etc.;
  • Increased revenue by ~35% using ML models;
  • Deployed the recommendation engine to the production environment;
  • Constructed A/B tests;
  • Explored customer behavior on the web.
Project Tech stack:
Python
PostgreSQL
AWS

Education

2016
MA Business And Financial Economics
Master
2016
MS Applied And Theoretical Statistics
Master

Languages

Ukrainian
Advanced
English
Advanced

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