Accounting Operations Associate
ABOUT MAINSTAY
Mainstay is the leading market intelligence platform purpose built for buying, managing, and selling homes in the single family rental industry. As an AI native company, we turn complex data into clarity that helps the industry move forward with confidence. Founded within Opendoor, Mainstay launched as an independent company in 2024 and recently raised a Series A round led by Khosla Ventures.
Ready to shape the future of real estate with AI? Join Mainstay and help us redefine what’s possible in the single family rental space. If you thrive on solving complex problems and want to make a tangible impact in a fast-growing industry, we’d love to hear from you - apply now and let’s move the industry forward, together!
Role Overview
Mainstay is hiring an Accounting Operations Associate to support the various operational aspects of our finance and accounting team as we scale. You'll oversee AP, AR, spend management systems, daily treasury functions, support close, and ensure GL data integrity.
What You'll Do
Accounts Payable & Receivable (primary focus)
- Own the full AP cycle: process vendor invoices, verify coding and approvals, manage payment runs, and maintain vendor terms.
- Own the full AR cycle: generate and send customer invoices, track collections, manage past-due follow-up, and apply cash receipts.
- Maintain accurate AP/AR aging schedules; proactively flag risk and resolve discrepancies with vendors and customers.
- Track and report on AP/AR KPIs (e.g., DPO, DSO, aging trends) and use them to drive process improvement.
- Own vendor onboarding, W-9/W-8 collection, and vendor record maintenance.
- Serve as the go-to point of contact for all AP/AR questions from vendors, customers, and internal teams.
Treasury & Cash Management
- Monitor daily cash positions across Mainstay's bank and operating accounts.
- Process and execute wire transfers, ACH payments, and other cash movements in line with internal controls and approval l...