Mojmir Vinkler, Developer in Brno, South Moravian Region, Czech Republic
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Mojmir Vinkler

Verified Expert  in Engineering

Data Mining Developer

Location
Brno, South Moravian Region, Czech Republic
Toptal Member Since
June 11, 2014

Mojmir is a full-stack data scientist with strong development skills, allowing him to handle model design, data collection, and final implementation of software. He has a strong background in statistics, machine learning, business, computer science, and predictive modeling of big data sets.

Portfolio

Kiwi.com
Docker, Scikit-learn, Flask, Spark, Python
Human Brain Project
Scikit-learn, StatsModels, Docker, Python
Picwell
Scikit-learn, Flask, Spark, Python

Experience

Availability

Part-time

Preferred Environment

GitLab, Jupyter, Atom, MacOS

The most amazing...

...thing I've ever built is an optimal product pricing algorithm based on an idea from multi-armed bandits that successfully increased revenues by a third.

Work Experience

Lead Data Scientist

2017 - PRESENT
Kiwi.com
  • Built a machine learning model from prototyping to deployment.
  • Optimized product and business processes.
  • Built an interactive web app to visualize A/B testing.
  • Set up infrastructure (BigQuery/Spark) to work with petabytes of data.
  • Managed and optimized revenue.
Technologies: Docker, Scikit-learn, Flask, Spark, Python

Python Programmer, Data Scientist

2018 - 2018
Human Brain Project
  • Built Federated Learning for medical data.
  • Implemented custom Federated Learning machine learning algorithms as Docker images.
Technologies: Scikit-learn, StatsModels, Docker, Python

Python Programmer, Data Scientist

2014 - 2017
Picwell
  • Processed huge amounts of data using Spark.
  • Created and optimized scikit-learn models.
  • Built an ETL application with Luigi and Flask.
  • Created surveys on Mechanical Turk.
  • Integrated R and Python code.
Technologies: Scikit-learn, Flask, Spark, Python

Pattern Analysis/Data Matching System Engineer

2014 - 2015
Flexcode (via Toptal)
  • Created an algorithm for predicting correct matches using text analytics and image processing plus a web UI for data collection.
Technologies: Google App Engine, Flask, Scikit-learn, Python

Data Scientist

2013 - 2015
Webnode
  • Handled ETL processing in Python with Pandas.
  • Designed and implemented optimal product pricing algorithms.
  • Designed a customer lifetime value (CLV) model.
  • Monitored AdWords (automated alerts) and bidding based on CLV.
  • Engaged in smart business reporting based on statistical models and machine learning.
Technologies: Pandas, R, MySQL, Python

Web Developer

2011 - 2013
Mergado.cz
  • Created an XML parser for parsing invalid XML files (product feeds for price comparison sites).
  • Developed web back-ends.
  • Designed and implemented functionality for bidding on price comparison sites.
  • Built data connectors to Heureka.cz and Sklik.cz.
  • Handled minor front-end work with JavaScript.
Technologies: Redis, MongoDB, JavaScript, PHP, Python

Federated Learning Algorithms

https://github.com/LREN-CHUV/algorithm-repository
Implemented various Federated Learning machine learning algorithms as docker images to be used in the Medical Informatics platform.

Universal Portfolios

https://github.com/Marigold/universal-portfolios
Plenty of online portfolio selection algorithms (financial engineering) and tools for analysis developed as part of my master's thesis (available in Czech at https://drive.google.com/file/d/0B5VWK_SXwPlkaGg2NGZYTjdYYzQ/edit?usp=sharing).

Languages

Python, R, JavaScript, PHP

Frameworks

Apache Spark, GAE, Flask, Spark, Django

Libraries/APIs

Matplotlib, Pandas, PyMC, NumPy, SciPy, PyQt, Scikit-learn, AdWords API

Tools

IPython Notebook, Sublime Text 2, IPython, StatsModels, MATLAB, Atom, Jupyter, GitLab

Paradigms

Business Intelligence (BI), Kanban, Functional Programming, Scrum

Storage

HDFS, Google Cloud, Redis, MongoDB, PostgreSQL, MySQL

Other

Data Engineering, Machine Learning, Data Mining, Deep Learning, Financial Engineering, Statistics, Data Visualization, Data Analysis, Bayesian Statistics

Platforms

Linux, Google App Engine, MacOS, Docker

2014 - 2017

PhD Degree in Biomedical Image Processing

Masaryk University - Czech Republic

2012 - 2014

Master's (MBA) Degree in Business Administration

City University of Seattle - Seattle

2009 - 2014

Master's Degree in Statistics and Data Analysis

Masaryk University - Czech Republic

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