Assistant Controller

GrowthX AI

15d•Remote

About The Position

GrowthX AI is seeking its first Assistant Controller to build and own the Accounting function. This is a 0-to-1 role where you will establish the accounting infrastructure, moving from an outsourced bookkeeping model to an in-house function that scales with the business and withstands audits. You will report to the Head of Finance and be responsible for the end-to-end integrity of the books, including close, reporting, AR/collections, AP oversight, revenue recognition, systems, and controls. A key part of the role involves bringing outsourced bookkeeping in-house and developing processes, controls, and documentation. The company operates on a hybrid model with subscription and services revenue, presenting complex revenue recognition scenarios. You will address immediate challenges such as aging AR, complex contract structures, multi-state tax exposure, and system integrations.

Requirements

Prior experience as a Controller, or as a strong Assistant Controller / Accounting Manager ready to run the function independently, ideally at a high-growth Series A SaaS company.
Experience building or materially maturing an accounting function (0 to 1 experience).
Deep knowledge of U.S. GAAP, including ASC 606 revenue recognition for subscription and services revenue, with the ability to reason through nonstandard revenue scenarios.
AI-forward: daily use of AI tools to improve efficiency in close, reconciliations, and reporting, with a clear point of view on automation.
Comfortable owning the close independently.
Ability to think like a business partner, understanding accounting and cash implications of business decisions.
Clear and direct communication skills, able to explain judgments to non-finance executives.
Self-directed and comfortable with ambiguity in a remote, async, high-autonomy environment.

Nice To Haves

Experience with Campfire, or a comparable modern GL (Ramp, Rippling, NetSuite, etc.).
Experience building an accounting function at a startup from the ground up.
Experience in a hybrid subscription + services revenue model.
Experience insourcing an accounting function that was previously outsourced, or transitioning a company off an outside bookkeeping firm.
Experience through a first audit or a first institutional financing round.

Responsibilities

Own the monthly, quarterly, and annual close, directing the outsourced accounting firm and working to bring close, bookkeeping, and AP execution in-house.
Prepare and ensure GAAP-compliant financial statements; analyze balance sheet and P&L movements and investigate variances.
Own AR and collections, including invoicing, payment application, aging, and direct customer follow-up.
Own AP oversight and vendor management, including approval workflows and vendor account hygiene.
Work through complex accounting topics including ASC 606 revenue recognition, contract modifications, and billing structures for subscription and services revenue.
Own core finance systems (Campfire, Carta, billing/payment stack) and their integration roadmap.
Establish accounting processes, approval workflows, documentation, and internal controls for a growing SaaS company.
Review customer and vendor contracts for accounting, billing, and revenue recognition implications.
Own equity administration, including option grant processing, cap table accuracy, and coordination with legal and the cap table system.
Support treasury functions, including cash positioning, inter-account transfers, and forecasting cash needs.
Coordinate tax and compliance with external advisors, including multi-state filings.
Partner with People Ops on payroll accounting, compensation changes, and compliance.
Prepare monthly reporting packages for lenders and investors.
Build audit-readiness through documentation and controls.