• Development for various telecommunications companies in Europe, Asia and Africa. • ERP, CRM systems development for Telecommunication Billing from scratch. • Database development (Delphi , PostgreSQL, DBISAM, MySQL) • Development of services and applications for primary Billing CDRs processing (ASN.1, Teles, XML, CSV and other VOIP / SMS switches formats) on Delphi / Free Pascal. • Delphi / Free Pascal Database Applications for Windows and UNIX systems.

• ERP, CRM system development for Billing and Warehouse Logistics systems. • Implementation and customization of Document management system. • Create schemes of business processes. • Logical and physical database design. • Development of integrated information control system (ORACLE, PostgreSQL, MS SQL Server). • Development environment - PL/SQL , Toad PL/SQL, Oracle Business Intelligence Discoverer, Oracle Warehouse Builder , Oracle Work Flow, T-SQL, Delphi, Free Pascal. • Manage the development team. • Scheduling to develop by MS Project. • Continuous monitoring of the timing and quality of the releases. • Work closely with database administrators, application servers’ administrators, and release managers.

• Perform full life-cycle B2B Database design and development experience. • Create and optimize server side programs of the billing accounts receivable, account balances and rating for Telecommunication Company. • Designed and programmed Spatial Oracle database and Oracle Warehouse in SQL, PL/SQL. • Write SQL, PL/SQL programs including triggers and stored procedures. Used XML for replicate data to other databases. Tuned the Oracle database performance. • Created Java programs in IntelliJ IDEA using Client/Server technology. • Created Java libraries. • Design logical and physical data models for telecommunication applications. Developed the application schema creation scripts. Developed the system and data migration processes. • Create SQL scripts to extract the database schema. • Load data into multiple databases for development or testing purposes. • Create PL/SQL programs for check data consistency. • Performed Oracle Database Administration for testing new programs and technologies. • Execution loading and unloading data for development or testing purposes by SQL loader scripts

• Maintain on-line billing and tariffing for internet-, VoIP- and TV- clients. • Development backend application (SQL, ORACLE PL/SQL). • Development system application in C, C++ for Unix OS. • Development Shell scripts for Unix OS and Cisco routers management. Used SNMP protocol. • Designed and Development interfaces for a billing management system in Delphi 7 and BDS. • Monitored the UNIX system, including the related processes, CPU, memory, and disk I/O. Created shell scripts and C-programs for good maintenance of system processes. • Implemented shell scripts. • Enforced security policies. Maintained users. • Designed the database backup and recovery strategies. Implemented the backup scripts, including hot backup, cold backup and exporting and importing scripts. • Performed administration and configuration and tuning Oracle, MS SQL Server and Informix performance. Provided perl, shell, and sql scripts for the database maintenance. Troubleshoot the system. • Loaded and unloaded data. • Analyze statistical data in Crystal Reports 8.5. • Created programs for maintain on-line billing and tariffing for internet, VoIP and TV clients. • Designed and developed interfaces for a billing management system in Delphi . • Development procedures and triggers in MSSQL 2000 Server for Billing systems. • Development a payment system. • System application in C, C++.