Main Functions: Delivering (develop, deploy, ensure uptime, maintain, optimise and evolute) billing infrastructure. Duties Include: Maintain and optimize billing infrastructure (databases & servers) and collaborate with vendors and refine performance. Maintain product catalogues and call charge rates and do analysis on rating (and updates) as well as analysis margin on accounts. Build mediation rules and usage flow into the billing system. Ensure customer charges are applied correctly. Migration of from legacy billing system to a new system (lead architecture discussions for this). Audit plans/products. Handle escalations & queries from internal & external teams (installation team, support team, stakeholders). P&L responsibility: Analyse invoices and identify cost-saving opportunities, same with vendors. Develop technical documentation and reports. Requirements: 8 - 10 years technical VoIP billing experience (fixed and variable billing) & ISP/Telco billing operations (in a Service Provider environment). 8 10 years in Linux OS. 8 10 years SQL database experience and intermediate SQL proficiency. Intermediate scripting: Perl / Python. Experience with integration into accounting packages and deploying middleware between systems. Large data analysis experience. Architecting billing system hierarchy. Preferred Experience: Project management and leadership experience Education: Bachelors Degree Apply now if you meet the minimum requirements If you are interested in this opportunity, please apply directly. For more IT jobs, please visit If you wish to send your CV via email, forward your CV to alangeninetworkrecruitment.co.za and copy the reference number in brackets, i.e. (BILLCOM) in the subject line of your e-mail. If you have not had any response in two weeks, please consider the vacancy application unsuccessful. Your profile will be kept on our database for any other suitable roles / positions. We also invite you to contact us to discuss your next career move in IT.