C++, C, Python, JavaScript, Node.js, Express, React, shell scripting. assembly language. Over 15 years experience writing very high-performance C++ applications for military, energy, and high-frequency trading, Technologies include STL, Boost, multithreading, and TCP/IP networking. C++11 and C++14. Full-stack web experience using JavaScript, using the latest technologies including Node, Express, and React, as well as MySQL and Mongo. Blockchain experience including Ethereum and developing private blockchains.