Data scientist with OPS and project management skills. Core expertise in CV, NLP, Recommendations. Interested in Reinforcement Learning.
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Machine Learning EngineerQoreai Nov 2023 - PresentTbilisi, GeorgiaDevelopment of chatbot system for car sales and customer support. Minor Machine learning tasks as server-side PII detection, client-side document detection with memory constrains;Achievements:Scalable and PII-secure chatbot for car sales, that leverage information provided by business;New-Generation Chatbot continuous quality measurement using LLMs and expert data;Implemented document recognition neural network that weights 130 KB; -
Ml Engineer/MlopsFreelance Jun 2022 - Nov 2023Project: Building plans recognitionRole:ML Engineer/MLOpsBuilding ML pipeline in an RnD project for generating 3D models of buildings. Transitioning the project from an RnD stage to a Production stage.Tasks: - Designing and implementing a machine learning pipeline in computer vision; - Training team to follow best practices of machine learning and ML models analysis;- Consolidating a large park of ML models and data processing stages into a unified structure with learning artifacts and logs management.Technologies: Python, FastAPI, ClearML, Airflow, Kubernetes, OpenCV, Gitlab CI, GCP.MLOps in CV (Building Plans Recognition)Project: Development of an Intelligent Plant Growth Advisor (based on images and text)Role: ML EngineerTasks:- Development of models for the classification of plant diseases;- Development of models for extracting named entities from text corpora about plants.Achievement: - Developed a PoC proving that recognition of certain plant diseases is possible at an acceptable level.Technologies: PyTorch, Fast.ai, ClearML, PostgreSQL, NLP, NER, CV.Project: Uniswap Analytics on GCPRole: Backend developerWriting an analytics service for evaluating the balance of cryptocurrency wallets on Uniswap.Tasks:- Designing application architecture;- BigQuery database management;- Development of dashboards in Google Looker Data Studio.- Development, deployment, and support of services working with the BitQuery API (cryptocurrency transaction analysis);Technologies: Python, GraphQL, BitQuery, BigQuery, SQL, GCP.
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Data ScientistGrid Dynamics Jan 2020 - Jun 2022St Petersburg, St Petersburg City, RussiaWorking on projects with different data types: CV, NLP, recommendations. Developing neural networks for text and visual product catalog search. Building a recommendation system, demand forecasting, optimizing the set of promo actions. T͏e͏a͏m͏: 2 Data Scientists, ML Engineer, MLOps, Team Leader.Achievements:- Increased text search conversion by using neural network vector search, increasing search CTR by 5%;Improved the recommendation system, increasing the CTR on recommendations by 10%;- Achieved an increase in sales in all projects through the implementation of ML solutions or the modernization of existing approaches to data collection and processing;- Transitioned the demand forecasting and promotion optimization system to AWS, resulting in an increase in the development speed, experiment reproducibility and transparency.Building a system of recommendations, demand forecasting, optimizing a sets of promotions. Tasks:- Developing, deploying, and validating models;- Developing production machine learning pipelines;- Data collection and preparation;- Writing tests for various stages of data preprocessing;- Maintaining, refactoring, and enhancing existing codebase; - Project planning, complexity estimation.Technologies: Python, FastAPI, PyTorch, AWS, GCP, GKE, BigQuery, Redshift, XGBoost, CatBoost, LightGBM, NLP, OpenCV, PostgreSQL. -
Data ScientistSberbank Dec 2018 - Nov 2019St Petersburg, St Petersburg City, RussiaAs a data scientist mainly engaged in the analysis of texts to identify problems and points of growth.Team: 3 Data Scientists, 1 Data Engineer, Team Leader.Achievements:- Helped the client to understand their media coverage and receive feedback from the bank;- Successfully used text clustering pipelines in various bank departments for an extended period of time.Tasks:- Summarizing media coverage of the bank (analyzing text from online media);- Text analysis and web scraping;- Analyzing medium-sized text data to find meaningful insights about the bank's operations;- Developing a review clustering pipeline;- Validating scoring models;- Forecasting customer complaints and employee illnesses. -
Python DeveloperVistamed Apr 2018 - Dec 2018St Petersburg, St Petersburg City, RussiaSupport, debugging, and extending the functionality of desktop and web applications for a medical company.Team: 3 Backend developers.Achievements:- Created reliable automated UI test suite for the common and critical parts of application;- Increased the speed of the ORM and optimized key SQL queries to the database;Tasks:- Writing automated tests for interfaces;- Debugging, fixing, and extending functionality of desktop and web applications for a medical company;- Writing back-end for web services;- Writing and profiling SQL queries;- Refactoring custom ORM in the project.
Sergey Krasun Education Details
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Applied Mathematics
Frequently Asked Questions about Sergey Krasun
What company does Sergey Krasun work for?
Sergey Krasun works for Qoreai
What is Sergey Krasun's role at the current company?
Sergey Krasun's current role is Data scientist concentrating on the OPS part.
What schools did Sergey Krasun attend?
Sergey Krasun attended Saint Petersburg State University.
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