Development of complex systems. Examples: - Worked on all aspects of Enterprise Client/Server Statistical Process Control commercial system. System collects information about processes (usually manufacturing) and applies statistical methods for it analysis. Supporting Databases: Interbase, Paradox, Oracle, MS SQL Server, Sybase. Used are: Delphi, Delphi component development, SQL, Borland BDE, MIDAS, DataSnap, COM/DCOM, data input from measuring devices. - Developed (as chief architect and also as programmer) from the ground-up a commercial system for plastic card authorization that works as regional extensions of world nets of VISA, MasterCard and American Express. That system: 1) supports through telephone lines or/and X.25 its own net of POS (Point of Sale) terminals with proprietary software, 2) provides real-time card authorization through designated processing center, 3) collects in DB information about authorization transactions and completed purchases, summarizes that inf