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Viacheslav Kondratiuk
Verified Expert in Engineering
Machine Learning Developer
Kiev, Ukraine
Toptal member since July 23, 2018
Bio
Slava is an open-minded developer who prefers quality over quantity. During his career, he always tries to bring well-architectured, scalable, and clean solutions. Currently, his experience allows him to build Big Data MapReduce application for testing of Navigational Maps.
Portfolio
Intellias
Amazon Web Services (AWS), Git, MapReduce, Python
DataArt
Twisted, Tornado, Gulp, JavaScript, Python
Freelancer
Redis, MySQL, JavaScript, Python
Experience
- SQL - 10 years
- Ubuntu - 8 years
- Git - 7 years
- Python - 5 years
- MapReduce - 3 years
- Flask - 3 years
- Hadoop - 2 years
- Machine Learning - 1 year
Preferred Environment
Scrum, Git, PyCharm, Ubuntu
The most amazing...
...thing I've coded is a MapReduce architecture from a scratch and built several processes of data analysis on the top of it
Work Experience
Python/Big Data Developer
2016 - PRESENT
Intellias
- Created a testing framework based on MapReduce architecture to check integrity and validity of navigational maps.
- Wrote different kinds of tests based on a developed framework.
- Took part at refactoring and splitting framework into components.
- Added support for multi versioning.
- Added new components to support AWS services.
Technologies: Amazon Web Services (AWS), Git, MapReduce, Python
Software Developer
2015 - 2016
DataArt
- Implemented Tornado-based API over MongoDB collected statistics.
- Added new statistic metrics on front-end/back-end in order to improve customers experience.
- Created a component to collect the loading time of framework main components for further performance improvements.
- Implemented multiple improvements for existing micro-services based on Tornado/Twisted frameworks.
- Added several MapReduce scripts for processing of collected Facebook data.
Technologies: Twisted, Tornado, Gulp, JavaScript, Python
Software Developer
2013 - 2015
Freelancer
- Applied user messaging history API.
- Added support and interface for interaction with Redis.
- Implemented performance tweaks to speed up MySQL.
- Took part at development of chatting system.
- Added different UI effects with JavaScript.
Technologies: Redis, MySQL, JavaScript, Python
Lead Software Developer
2010 - 2015
ISM
- Created web-shops using Magento framework.
- Added support for fast import/export of different Magento entities.
- Updated shipping and payment methods in order to match customer requirements.
- Developed reusable Magento extensions.
- Optimized performance for long running tasks.
Technologies: JavaScript, MySQL, Magento, PHP
Full-Stack Software Developer
2007 - 2009
Avadi Intellect
- Developed a wizard for step by step website creation.
- Deployed an infrastructure for automatic creation of websites.
- Applied a wizard framework to support housekeeping and rent website.
- Wrote database migration scripts using PHP.
- Developed a tool for administrators to track user statistics.
Technologies: MySQL, JavaScript, PHP
Experience
Trust You
https://www.trustyou.com/The world's largest guest feedback platform. TrustYou collects and analyzes over 3 million guest reviews, surveys, and social posts from all across the web, every week, for 500,000 hotels. I've built and improved micro-services, collected statistics, and followed the best Agile approaches.
ISM
https://www.ism.nl/One of the biggest eCommerce companies in the Netherlands. I've started here as Middle PHP Developer and grown to be a Lead. We have built a lot of successful Magento webshops to present offline business on the internet.
HERE Maps
https://www.here.com/enA company where I developed the MapReduce application to help Map testing become easier, to provide meaningful results during maps life cycle, and improve quality.
Education
2001 - 2006
Master's Degree with Honors in Automation Engineer Technology/Technician
Military Institute of Radio Electronics - Zhytomyr, Ukraine
Certifications
FEBRUARY 2017 - PRESENT
Machine Learning Course
ODS
JANUARY 2017 - PRESENT
Machine Learning
Coursera
MARCH 2016 - PRESENT
Hadoop System
Stepik
MARCH 2015 - PRESENT
Discrete Math
Stepik
DECEMBER 2014 - PRESENT
Introduction to Computational Thinking and Data Science
edX
OCTOBER 2014 - PRESENT
Introduction to Computer Science and Programming Using Python
edX
MARCH 2014 - PRESENT
Introduction to Databases
Stanford Online
Skills
Libraries/APIs
jQuery
Tools
Git, PyCharm, Gulp
Languages
Python, PHP, JavaScript, SQL, C++
Frameworks
Flask, Hadoop, Twisted
Paradigms
MapReduce, Scrum, Concurrent Programming
Platforms
Ubuntu, Magento, Amazon Web Services (AWS)
Storage
MySQL, SQLite, Redis, MongoDB, CouchDB, Amazon S3 (AWS S3)
Other
OOP Designs, Machine Learning, Distributed Systems, Tornado, Ajax, Big Data
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