Mostly experienced in native imperative languages (Delphi, Ada, C, C++). Like to do cross-language bindings. Also know little PHP and JavaScript. Have knowledge of all 3 main desktop OSes, but experience varies. Long ago (2004,2005) participated in Russian informatics olympiads (ACM and alike), but personally I prefer Software Engineering which was missing from these olympiads tasks. Programming experience dates back to DOS ages, and I used assembler, programmed TSRs and reverse engineered modern x86 and x86_64 executables.