I have been hacking Linux since 1994 and programming C/C++/assembly since then.
Git, make and related build tools, gcc, llvm, performance analyzing and optimizing with assembly/perf/valgrind.
Network/communications/operational security, (secure) programming and testing, cryptography, cryptocurrencies, Linux systems administration, Cloud security, Selenium and end-to-end black box UI testing.
I do freelance coding projects, code reviews. Use contact methods listed below.