AI-Enabled Multistate Payroll Specialist (Canada/US)

thetradedesk; Ventura (CA); On-site; USD 65,000 - 90,000; Full time

Job summary

The Trade Desk is a global technology company and the world's leading independent platform for digital advertising, with over 3,000 employees across more than 30 offices. Our payroll team ensures accurate, timely processing for US and Canada employees, leveraging AI tools under human review to enhance audits and reporting.

You will collaborate with Finance and People Ops in a high-volume environment.

Qualifications

• 3–5 years of multi-state payroll processing experience.
• Strong knowledge of payroll principles and federal/state regulations.
• Experience with AI tools in payroll auditing.
• Proficient in Microsoft Office, especially Excel.

Responsibilities

• Act as first point of contact for payroll inquiries via the ticketing system, ensuring timely, accurate resolution with a strong service focus and escalating complex issues as needed.
• Support end‑to‑end payroll processing across US and Canada employees across multiple states on schedule, from time and attendance collection and validation through data entry, calculation review, pre-transmission audit and post-payroll reconciliation.
• Reconcile payroll registers, tax liabilities and general ledger postings, and validate confirmation reports; research and correct variances.
• Process 401(k) reconciliations each pay cycle, tying employee deferrals, employer match and loan repayments to recordkeeper files, and resolve discrepancies and process corrections.
• Process garnishments, levies, child support and other involuntary deductions, including calculating withholdings within federal and state limits, setting up orders, remitting payments on time and maintaining documentation.
• Apply state and local tax withholding and unemployment (SUI) requirements for multi-state employees, track work-location changes, and support new state registrations with guidance from the Payroll Manager.
• Support quarterly and year-end reporting across federal, state and local jurisdictions, including W-2 and T4 preparation and W-2 corrections, and research and respond to tax notices with guidance as needed.
• Support accurate taxation and reporting of employer-paid benefits and equity compensation, including RSU vesting, NSO exercises, Employee Stock Purchase Plan (ESPP) and Incentive Stock Option (ISO) events, in partnership with senior team members.
• Load and validate import files and prepare ad hoc payroll reports as requested.
• Use company-approved AI tools to assist with payroll audits, variance analysis, reconciliations and drafting employee responses, always applying human review.
• Protect employee PII and confidential compensation data.
• Collaborate with stakeholders such as Finance, People Ops and Benefits, and assist other teams with special projects.
• Ensure compliance with SOPs, local regulatory requirements, and SOX control standards.
• Support internal and external audits and respond to requests for supporting documentation.
• Monitor and stay current on statutory and regulatory payroll changes across the U.S. and Canada.
• Support documentation of payroll processes and contribute to process improvements and automation initiatives.
• Work effectively in a fast-paced, high-volume environment while managing multiple priorities and deadlines.

Skills

Multi-state payroll

Payroll software

Excel

AI tools knowledge

Regulatory compliance

Tools

HRIS software

Job description

The Trade Desk is a global technology company and the world's leading independent platform for digital advertising, with over 3,000 employees across more than 30 offices. Our payroll team ensures accurate, timely processing for US and Canada employees, leveraging AI tools under human review to enhance audits and reporting.

You will collaborate with Finance and People Ops in a high-volume environment.