Role Overview We are seeking a Billing Systems Developer to own and advance the billing systems layer within our BSS environment, with a strong focus on both consumer and wholesale billing. This role involves working directly with billing platforms (including Sage), developing integrations between billing and operational systems, and ensuring that billing data flows accurately across the ecosystem. The successful candidate will need to understand the end-to-end billing lifecycle in a telecom or service provider context, including rating, invoicing, and reconciliation across consumer and wholesale channels, and be comfortable working with both legacy and modern billing systems.

Key Responsibilities
? Develop, maintain, and enhance billing system integrations between Sage, ServiceNow, and internal platforms across consumer and wholesale billing channels
? Build and support automated billing workflows including invoice generation, payment reconciliation, credit management, and account management for both consumer and wholesale customers
? Ensure billing data accuracy and consistency through validation logic and cross-system auditing across all billing channels
? Collaborate with Finance, Sales, and Service Assurance teams to understand consumer and wholesale billing requirements and resolve discrepancies
? Develop APIs and data pipelines for billing data exchange across BSS and OSS platforms
? Support wholesale billing processes including partner/reseller billing, interconnect settlements, and revenue sharing where applicable
? Troubleshoot and resolve billing-related incidents and data issues across consumer and wholesale accounts
? Support the implementation of new products and pricing models within the billing framework for both channels
? Document billing system architecture, workflows, and integration points Required Skills and Experience
? 4+ years of experience in billing systems development, ERP integration, or financial systems engineering
? Experience working with Sage or similar accounting/billing platforms
? Proficiency in Python, SQL, or similar languages for data manipulation and automation
? Hands-on experience with REST API development and database management
? Strong understanding of billing processes across consumer and wholesale channels (invoicing, payments, credit management, reconciliation, partner settlements)
? Experience with wholesale or interconnect billing, revenue sharing, or reseller billing models is expected

Attention to detail and strong analytical skills for troubleshooting data discrepancies across multiple billing streams

Preferred Qualifications
? Experience in telecommunications or ISP billing environments, particularly with consumer and wholesale billing models
? Familiarity with TMF Open APIs (especially TMF666 - Account Management, TMF678 - Customer Bill Management)
? Experience integrating billing systems with ServiceNow or similar platforms
? Understanding of revenue assurance, financial data governance, and multi-channel billing reconciliation
? Exposure to ETL tools or data pipeline frameworks