• Manage end-to-end finance operations including invoicing, accounts receivable/payable, payroll coordination, expense management, and cash flow oversight. • Ensure accurate monthly bookkeeping, reconciliations, and timely management reporting. • Implement and maintain strong financial controls and internal processes. • Oversee tax compliance, statutory filings, and annual audits in partnership with external advisors. • Build reliable reporting rhythms (monthly close, cash flow updates, KPI dashboards). • Build and maintain financial models to support growth planning, hiring decisions, pricing, and capital allocation. • Lead annual budgeting and rolling forecasts in partnership with leadership. • Track and analyze key financial and operational metrics, identifying risks and opportunities. • Prepare board and investor reporting materials as we scale. • Design scalable finance systems, tools, and workflows. • Select and implement the right finance tech stack (accounting, billing, reporting). • Establish best practices that position Sandstone for long-term scale. • Act as a strategic thought partner to the founders on financial trade-offs and growth decisions.