Marek Szapiel, Developer in Charleston, United States
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Marek Szapiel

Verified Expert  in Engineering

Multithreading Developer

Location
Charleston, United States
Toptal Member Since
July 17, 2017

Marek is a software developer with a decade of experience in writing high-performance software (high-speed market trading/quote consolidation and more). His primary programming language is C++, but he also uses Python, NumPy, and SciPy for data analysis. Currently, he's looking for a flexible-time/work-from-home software development position.

C++MultithreadingLinuxCPerlBoostPython 2SciPyNumPyGitOpenMPGoPyQtQtSQLite

Availability

Part-time

Preferred Environment

Git, OS X, Linux, Docker, C++, Python 3, Go

The most amazing...

...project I've implemented was a market quote engine that consolidated market data from several exchanges and made the prices available in the shared memory.

Work Experience

Senior Software Engineer

2016 - PRESENT
KORS Analytics
  • Implemented market-trading strategies using C++.
  • Acted as the system administrator of the research server.
  • Implemented Ethereum smart contracts.
  • Developed a database reporting tool for the U.S. Navy.
Technologies: Linux, Python, Boost, C++

Senior Software Engineer

2014 - 2016
KOS Analytics
  • Implemented market-trading strategies in C++.
  • Developed various supporting software for the trading strategies (quote consolidator, order consolidator, and more).
  • Took care of some system administration tasks (backups, maintenance of our development environment).
  • Wrote some support/computational scripts using Python.
Technologies: OpenMP, Linux, Python, Boost, C++

Software Engineer

2007 - 2014
Citigroup
  • Maintained the market prediction engine (using C++).
  • Developed and maintained the market trading strategies (in C++).
  • Developed an internal web application for monitoring the trading models.
  • Wrote computational/research scripts (in Python, Numpy, and SciPy).
  • Developed some GUI (graphical user interface) applications for visualizing data (using Qt).
Technologies: Perl, Qt, Linux, Boost, Python, C++

Software Quality Assurance Engineer

2005 - 2007
Wolfram Research
  • Maintained a numerical testing suite for Mathematica.
  • Developed test automation (using Perl).
  • Worked with customers on bug/issues reports (especially numerical bugs).
  • Implemented statistical tests of random number generators for mathematics.
Technologies: Windows, OS X, Linux, Perl, Mathematica

Quote Consolidation Engine

This engine consolidates quotes from several stock exchanges and creates a single view on the market that was available for trading strategies via the shared memory. The application had to deal with a very large amount of data arriving at a high speed.

Languages

C++, Go, C, TeX, Perl, Python 2, Python 3, Python, Bash Script, Lua

Frameworks

Boost, Qt

Libraries/APIs

OpenMP, Eigen, SciPy, NumPy, PyQt, Scikit-learn, Dlib, Qwt

Tools

Mathematica, Git, Vim Text Editor, Vendor Independent Messaging (VIM), GDB, Subversion (SVN), Makefile, Qt Creator, CVS, bzr

Paradigms

Event-driven Programming

Platforms

Linux, OS X, Windows, MacOS, Docker

Storage

SQLite, PostgreSQL, MySQL

Other

Networks, Multithreading

1997 - 2005

PhD Degree in Mathematics

University of Tennessee - Knoxville, TN, USA

1992 - 1996

Bachelor's Degree in Mathematics and Computer Programming

Maria Curie-Skłodowska University | UMCS - Lublin, Poland

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