Your Department  We run T Cloud Public!  T Cloud Public is a public cloud standard product based on open-source community software and driven by DevSecOps principles. Lean structures, agile methods, highly motivated teams, and an extremely dynamic business environment define the way we work. With our customer-oriented and agile mindset, we are the anchor point for the Public Cloud business within the Deutsche Telekom Group.  As a  Senior Customer Billing & Invoice Operations Specialist , you will ensure smooth and accurate billing, financial, and commercial processes across the cloud customer lifecycle. You will act as a key interface between customers, Sales, Finance, Delivery, Operations, Partner Management, and other internal teams . Your main responsibilities will include: Managing Order-to-Cash and billing activities for cloud products and services Ensuring accurate and timely invoicing in line with contracts, consumption data, and internal policies Reviewing invoice quality, identifying discrepancies, and coordinating corrections Supporting customer and partner onboarding into billing and operational processes Providing commercial and financial guidance to Sales and Bid teams Supporting pricing, billing models, deal structures, and financial evaluations Ensuring compliance with TSI governance and financial steering requirements Driving process improvements, standardization, transparency, and audit readiness Supporting revenue assurance, profitability, and financial performance management