Gathered and analyzed business requirements for the Huawei Convergent Billing System (CBS) and designed tailored technical solutions for clients. 1. CelcomDigi New Billing Consolidation (NBC) Project: - Analyzed and streamlined E2E business processes (BP) of Celcom and Digi billing systems to a unified CelcomDigi BP. - Prepared Functional Requirement Specifications (FRS) and Interface Specification Documents (ISD) for system customization and integration between CBS and 3rd-party systems for northbound systems (eg: CRM) and southbound systems (eg: MSC/SMSC/GGSN/PCRF) . - Analyzed system configurations and defined CBS customization requirements. - Coordinated with QA to ensure test coverage for functional and non-functional requirements. 2. Camtel NGBSS Upgrade Project (Yaoundé, Cameroon): - Analyzed business requirements for CBS R23 upgrade and integration with BSS systems (CRM, SOAIF, Mediation, IPCC, Reporting). - Supported System Integration Testing (SIT) & User Acceptance Testing (UAT), ensuring solutions met business needs. 3. Tanzania Tigo CBS Upgrade Project: - Led requirement analysis for CBS upgrade from R20 to R24 and conducted technical workshops with clients. - Defined functional specifications and collaborated with technical teams on system customizations. 4. Lebanon Alfa CBS Migration Project: - Analyzed business processes, system functionalities, and live data of Ericsson’s Charging System (CS) to design optimized functional and integration solutions for CS-to-CBS migration.

- Designed, developed, and maintained RESTful APIs using Spring Boot framework and Github for code version control. - Developed and executed automated test cases using JUnit. - Managed PostgreSQL database including schema design, maintenance, and utilizing SQL to manage database records. - Maintained and debugged Extract Transform Load (ETL) system for accurate data mapping.