Business Systems Engineer – Vertex Tax Systems

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We are seeking a highly skilled Staff Business Systems Engineer – Tax Technology to lead the strategy, architecture, implementation, and optimization of our global tax technology landscape. This role will serve as the technical leader for tax platforms, partnering closely with Tax, Finance, Accounting, IT Engineering, and business stakeholders to deliver scalable, compliant, and automated tax solutions that support Core Weave’s rapid global growth.

The ideal candidate brings deep expertise in multiple tax engines (Vertex, Avalara, 1

Source etc.), with strong indirect tax domain knowledge, and hands‑on experience integrating tax platforms with ERP, billing, procurement, and enterprise applications. This individual will drive the modernization of tax technology while ensuring compliance, operational efficiency, and enterprise scalability.

• Lead the architecture, implementation, enhancement, and support of tax solutions across global operations.
• Design scalable tax technology solutions supporting Sales & Use Tax, VAT, GST, excise tax, withholding tax, and other indirect tax requirements.
• Partner with Global Tax, Finance, Accounting, Revenue, Procurement, and Engineering teams to define and implement tax system strategies.
• Design, implement, and maintain integrations between tax platforms and enterprise applications including Net Suite, SAP, Workday, Salesforce, Coupa, billing platforms, e‑commerce platforms, procurement systems, and data warehouses.
• Support global tax determination, tax calculation, exemption certificate management, tax reporting, tax returns, and audit requirements.
• Lead tax technology projects from requirements gathering through architecture, development, testing, deployment, and post‑production support.
• Drive automation of tax processes to improve accuracy, compliance, operational efficiency, and scalability.
• Ensure tax systems comply with SOX controls, audit requirements, data governance policies, and regulatory standards.
• Collaborate with business stakeholders to evaluate new tax regulations and implement required system changes.
• Develop technical designs, integration specifications, and solution documentation.
• Troubleshoot complex tax calculation, integration, and compliance issues across enterprise applications.
• Establish best practices for tax technology architecture, integrations, monitoring, and operational support.
• Serve as the primary technical subject matter expert for tax platforms and enterprise tax systems.

• Bachelor's degree in Information Systems, Computer Science, Finance, Accounting, Business Administration, or a related field.
• 15+ years of experience implementing and supporting enterprise tax technology solutions.
• 10+ years of hands‑on experience with multiple tax platforms.
• Strong understanding of indirect tax processes including:
• Sales & Use Tax
• VAT
• GST
• Global indirect tax compliance
• Experience implementing tax systems integrations with one or more ERP platforms such as:
• Net Suite
• SAP
• Oracle
• Experience integrating tax systems with procurement, billing, e‑commerce, and financial applications.
• Strong understanding of enterprise integration technologies including APIs, middleware, and iPaaS platforms (Workato,…