Senior Accountant

About the role

Panthalassa continues to expand and strengthen our internal finance and accounting capabilities as the company scales from R&D toward manufacturing and deployment. We are looking for a hands-on accounting operator to own the accuracy, reliability, and responsiveness of our day-to-day accounting workflows. This is a high-ownership operating role that goes beyond AP processing. You will excel if you are a practical problem solver who can build and operate processes that ensure clean data, clear processes, and accurate books at scale.

Responsibilities

• Own and support core accounting operations, including accounts payable, procure-to-pay, and month-end close workflows.
• Manage vendor onboarding, vendor records, invoice intake, bill entry, approval routing, payment preparation, and payment follow-up.
• Maintain clean, accurate financial data in NetSuite, including transaction coding, vendor records, reporting inputs, and process documentation.
• Ensure invoices, bills, expenses, and payments are coded accurately by department, project, vendor, spend category, and other relevant dimensions.
• Aid with spend tagging and reporting to improve visibility for budgeting, forecasting, and financial planning.
• Work with internal teams to understand the context behind purchases and translate that context into repeatable accounting and coding rules.
• Support timely and accurate month-end close, including reconciliations, journal entries, accruals, prepaid expenses, account analysis, and supporting schedules.
• Identify repetitive, manual, or error-prone workflows and propose practical ways to improve them using process improvement, automation, AI tools, better spreadsheet design, workflow software, or ERP configuration.
• Support payment operations, including vendor questions, missing payments, invoice discrepancies, payment timing, and related issue resolution.
• Support audit, tax, compliance, and other finance requests as needed.
• Partner with finance and leadership, accounting leadership, and external accounting partners on technical accounting questions, controls, close tasks, and reporting needs.
• Maintain an extremely high bar for accuracy, confidentiality, responsiveness, and ownership.

Qualifications

• 5+ years of accounting, accounting operations, accounts payable, general ledger, or related finance operations experience.
• Strong accounting fundamentals and familiarity with U.S. GAAP.
• Experience with accounts payable, vendor onboarding, payment processing, invoice coding, and month-end close support.
• Ability to book journal entries and understand when to escalate more complex accounting questions.
• Technology-forward, with strong judgment for using AI, automation, and modern tools to improve accounting workflows while preserving accuracy and controls.
• Strong communication skills with both internal stakeholders and external vendors.
• Ability to understand business context and turn it into clear, repeatable accounting treatment.
• Comfort working in spreadsheets and with financial data; you do not need to be a hardcore quant, but you should have strong number sense.
• Experience with NetSuite or another ERP system.
• Strong Excel skills.
• A hands-on, ownership-oriented mindset and willingness to do the work directly.
• Comfort building and operating processes in a fast-moving, lean environment.

Benefits

We offer:

• Cash compensation of $125,000 - $180,000
• Equity in the company. We're all owners and if we're successful, this equity should be far and away the most valuable component of your compensation.
• A benefits package that helps you take care of yourself and your family, including:
• Flexible paid time off
• Health insurance (the company pays 100% of gold level PPO plan for full time employees, their partners, and dependents)
• Dental insurance (the company pays 100% for full time employees, their partners and dependents)
• Vision insurance (the company pays 100% for full time employees, their partners, and dependents)
• Disability insurance (the company pays 100% for a policy to provide long term financial support if you become disabled)
• Ability to contribute to tax-advantaged accounts, including 401(k), health FSA, and dependent care FSA
• Relocation assistance to facilitate your move to Portland (if needed).

Location

This is an on-site position. Our offices, lab, and shop are located in Portland, Oregon.