Finance Manager, Proton.ai

• SaaS metrics fluency. You understand ARR, NDR, CAC, LTV, burn multiple, and magic number cold
• Financial modeling skills. You've built operating models from scratch and can maintain them as the business evolves
• Startup experience. You've worked at a Series A or B stage company and understand the pace and ambiguity
• Based in Boston. In office 3x/week in Kendall Square
• Exceptional attention to detail. Your models are airtight. Your reports are accurate. You catch things others miss

Desirable

• We're looking for a Senior Financial Analyst to be our finance lead. You'll own the function—building our operating model, running FP&A, managing reporting and compliance, and working directly with the CEO on financial decisions.
• You'll have one direct report (our bookkeeper) and full ownership of how finance runs at Proton
• If you succeed, you'll have built the finance infrastructure that supports Proton's growth from $10M to $50M+ ARR
• Own FP&A (40%)
• Build and maintain our operating model and budget
• Prepare monthly budget vs. actuals reporting
• Track and report on SaaS metrics (ARR, NDR, CAC, LTV, magic number, etc.)
• Prepare board materials and investor reporting
• Build bespoke financial analysis for business decisions
• Run Financial Operations (40%)
• Oversee accounting: revenue recognition, month close, AP/AR
• Own billing, collections, and cash management
• Ensure compliance: corporate tax, sales tax, R&D tax credit, 409a valuations
• Calculate and manage variable compensation and partner commissions
• Lead Fiona (bookkeeper) and manage external accounting relationships
• Partner with the CEO (20%)
• Be a thought partner on financial decisions
• Support fundraising preparation when needed
• Identify opportunities for financial process improvement