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ArenaArenaCalifornia

Assistant Controller

Builds accounting function from scratch for high-growth AI startup, owning financial closes, revenue recognition under ASC 606, ERP implementation, internal controls, and audit readiness. Requires 8+ years experience, CPA, GAAP expertise, and hands-on builder mindset with AI workflow integration.

Salary not listed
Hybrid8+ YOEFinance & Accounting

About the role

Responsibilities

  • Own monthly, quarterly, and annual financial closes, delivering GAAP-compliant financial statements and analyses.
  • Manage day-to-day financial operations including AP/AR, expense allocations, balance sheet reconciliations, and invoice reconciliation across major enterprise accounts.
  • Own revenue recognition end-to-end, applying ASC 606 across complex enterprise contracts.
  • Design and implement scalable financial systems, processes, and controls to support rapid growth, including leading our first ERP implementation.
  • Manage cash flow and working capital timing across large enterprise billing cycles.
  • Build and maintain a strong internal control environment and establish accounting policies from scratch.
  • Lead audit and tax readiness — serve as the primary liaison for external auditors and ensure compliance with all local, state, and federal tax requirements.
  • Partner with the Head of Finance and leadership to translate data into strategic insights and define the roadmap for building out the accounting function as the company scales.

Requirements

  • 8+ years of progressive experience in accounting, with a strong track record at high-growth technology startups. Big 4 foundation preferred.
  • Deep expertise in U.S. GAAP, specifically revenue recognition (ASC 606), stock-based compensation, and consolidations.
  • Practical experience leading a company through its first financial statement audit and building internal controls from scratch.
  • Strong background in implementing and managing ERP systems and modern finance tools (e.g., Ramp).
  • CPA certification and strong technical accounting foundation required.
  • A builder mindset: hands-on, resourceful, and comfortable owning both the details and the architecture of the function.
  • Actively leveraging AI in your workflows today — it's already part of how you work, not something you're planning to explore.

Nice-to-Haves

  • Experience at a high-growth AI or SaaS startup with enterprise customers.
  • Familiarity with cloud infrastructure cost accounting.
  • Comfortable writing SQL and working in data warehouse environments to pull financial reports and validate data.
  • Experience partnering directly with engineering and infrastructure teams.

Compensation

  • Competitive compensation and equity aligned to the markets where our team members are based.
  • Comprehensive health and wellness benefits, including medical, dental, vision, and additional support programs.

Skills

U.S. GaapASC 606ERP SystemsRampSQLData WarehousesRevenue RecognitionInternal ControlsFinancial ReportingGaap Financial Statements
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