Seeking a highly hands-on SAP AR Solution Architect to support and lead major initiatives across Client's Accounts Receivable landscape. This role owns solution design and delivery for a complex, highly customized SAP ECC/S/4HANA environment supporting customer payments, credit card processing, lockbox operations, banking integrations, customer portals, FSCM processes, and AR automation platforms. The ideal candidate will combine architectural leadership with hands-on execution, including solution analysis, configuration, testing, troubleshooting, integration design, and stakeholder management. This is not a strategy-only architecture role. The successful candidate must be able to jump into a customized environment, quickly understand existing processes, and independently drive initiatives forward. 15+ years of SAP experience with deep SAP FI-AR/FSCM expertise Strong hands-on experience across Credit, Collections, Disputes, Cash Application, Deductions, Incoming Payments, Lockbox, and EBS Hands-on SAP ECC and S/4HANA configuration in high-volume AR environments Experience with credit card payments, payment gateways, PCI initiatives, customer payment portals, and bank integrations Strong integration experience with APIs, middleware, SAP PI/PO, and external financial systems Experience with HighRadius or similar AR automation platforms Experience leveraging SAP BTP, AI/GenAI, ML, RPA, or workflow technologies for AR automation Ability to architect complex SAP AR integrations across portals, banks, payment providers, and automation tools Strong ABAP understanding, troubleshooting/root-cause analysis, and testing experience Experience in highly customized SAP environments and designing scalable future-state solutions