AP/AR Specialist — Scale FinOps for Renewable Infra

Socket.dev; Mountain View (CA); Hybrid; USD 90,000 - 120,000; Full time

Job summary

Rune is seeking an AP/AR Specialist in Mountain View, CA, offering a hybrid work arrangement to own the full AP/AR cycle and ensure accurate vendor payments and timely customer invoicing.

In this hands-on role you will partner with supply chain, site operations, and the commercial team to scale manufacturing and deployments while maintaining clean, auditable records. Strong Excel and Ramp/ERP experience are required.

Qualifications

• You have owned full-cycle AP and AR hands-on, ideally as an early finance hire at a startup.
• Comfort reading commercial contracts and translating payment terms, credits, and milestones into billing and payment actions.
• Fluency in a modern accounting stack: an ERP or GL system (QuickBooks, NetSuite, or similar) plus spend management tools; direct experience with Ramp is a plus.
• Strong Excel skills: lookups, pivot tables, and reconciliations at a minimum.
• Bias to build: you've created or materially improved AP/AR processes rather than inheriting them.

Responsibilities

• Own the full AP cycle: vendor onboarding (W-9s and banking verification), invoice intake and GL coding, PO and receiving matching, approval routing, and payment runs via ACH, wire, and check.
• Process high-dollar hardware and equipment invoices for servers, networking, electrical and HVAC components, matching against POs, BOMs, and receiving records, and resolving discrepancies before payment goes out.
• Manage payments to site landlords, contractors, and equipment lessors, including milestone-based construction payments and monthly pass-through charges that must tie to the underlying agreements.
• Administer our corporate card and spend program (Ramp): receipt compliance, coding, and monthly statement close.
• Enforce payment fraud controls: callback verification for new or changed banking details, dual approval on wires, and disciplined vendor master hygiene.
• Own W-9 collection and annual 1099 filings.
• Own customer invoicing end to end: read our commercial agreements and translate payment terms, prepayment drawdowns, usage charges, and escalators into accurate, on-time invoices.
• Calculate and apply service credits per contract mechanics, coordinating with engineering and operations on the underlying uptime and availability data.
• Track customer prepayments and deposits, ensuring drawdowns, true-ups, and refunds match contract terms.
• Run collections and the AR aging: reminders, escalation paths, and clean cash application against open invoices and prepayment balances.
• Prepare billing schedules and support the Controller on revenue recognition workpapers.

Job description

Rune is seeking an AP/AR Specialist in Mountain View, CA, offering a hybrid work arrangement to own the full AP/AR cycle and ensure accurate vendor payments and timely customer invoicing.

In this hands-on role you will partner with supply chain, site operations, and the commercial team to scale manufacturing and deployments while maintaining clean, auditable records. Strong Excel and Ramp/ERP experience are required.