I am a software developer using mostly Java and SQL, T-SQL, PL/pgSQL at which I am expert.

I also know Python and JavaScript at some decent intermediate level.
Also, for 2 years I used to work professionally with C# but that was more than a decade ago and I haven't practiced it since.

I have M.Sc. and Ph.D. in Computer science (Ph.D. is in Bioinformatics in particular).
I studied in a math high school, and I had done a lot of competitive math (25 years ago).

I like math and pure computer science a lot.

I am open to freelance work which is somewhat related to algorithms, mathematics, statistics, data science, etc.

http://fxfyfz.eu5.net
http://www.linkedin.com/in/papetrov
https://zerosense.wordpress.com
https://fxfyfz.blogspot.com/

Languages:
Bulgarian, English (perfect); Russian, German (good)