Illarion Kovalchuk

Illarion Kovalchuk

Expert Java Hadoop developer, with full stack experience

Odessa, Ukraine



What's the difference?

I am an enthusiast developer looking towards non enterprise interesting projects, generally in area of algorithms, big data processing with Hadoop, back-end api projects, image processing or implementation of simple but brilliant great ideas.

Over last 6 years, I was working with medical hardware-software for iris/ocular recognition and it's results, processing, massive storage services (online backup+storage) and data analysis using hadoop.

Besides that I always use and improve my Linux admi…


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Work History & Feedback

Small Java program capable of two threads, and reading from Flickr API

Fixed Price $15

Hadoop HDFS and Mapreducer

“Great guy to work with.”
Fixed Price $10

python script to make video from photos

“Illarion produced a solution far better than I expected, with additional functionality I didn't even specify but is very valuable, including options for multithreading. He showed great creativity and problem solving, wrote clean high quality code, and communicated very well. I would love to work with him again! Thank you Illarion!”
Fixed Price $56
Tests Taken
Name Percentile Score

Java Test


SQL Test