Hristo Iliev

Chief Data Scientist



Hi there! My name is Hristo and I’m what you get when you combine a physicist, a data scientist, and a software developer. I’m the chief data scientist of holler.live and most of my time goes in writing Python and Scala code, scraping and analysing data, designing algorithms, and learning about information retrieval in general. You can also find me answering questions on Stack Overflow. I seem to have become something of an authority on parallel programming there, and in particular am the only one as of today (March 2019) to hold golden badges for both MPI and OpenMP.

profile for Hristo Iliev at Stack Overflow, Q&A for professional and enthusiast programmers

In my past lives I’ve also done research in physics and performance optimisation of parallel scientific codes.


  • Statistical Learning
  • Information Retrieval
  • High-Performance Computing
  • Artificial Intelligence
  • Software Developmen


  • PhD in Atomic and Molecular Physics, 2009

    University of Sofia

  • BSc in Physics, 2003

    University of Sofia

Recent Posts

Recovering Datasets from Broken ZFS raidz Pools

There are generally two kinds of people–those who’ve suffered a severe data loss and those who are about to suffer a severe …

Recipe: Obtaining Peak VM Size in Pure Fortran

Often in High Performance Computing one needs to know about the various memory metrics of a given program with the peak memory usage …

MPI Programming Basics

Embracing the current development in educational technologies, the IT Center of the RWTH Aachen University (former Center for Computing …

Linear Congruency Considered Harmful

Recently I stumbled upon this Stack Overflow question. The question author was puzzled with why he doesn’t see any improvement in …