Senior Accountant - Accounts Payable & Procure-to-Pay

About this role

Who We Are

Lightning AI is the company behind PyTorch Lightning. Founded in 2019, we build an end-to-end platform for developing, training, and deploying AI systems—designed to take ideas from research to production with less friction.

Through our merger with Voltage Park, a neocloud and AI Factory, Lightning AI combines developer-first software with cost-efficient, large-scale compute. Teams get the tools they need for experimentation, training, and production inference, with security, observability, and control built in.

We serve solo researchers, startups, and large enterprises. Lightning AI operates globally with offices in New York City, San Francisco, Seattle, and London, and is backed by Coatue, Index Ventures, Bain Capital Ventures, and Firstminute.

The Way We Work

The people who thrive here are builders who move fast, communicate openly, take ownership, and continuously improve themselves, their teams, and our company. Here's what that looks like in practice:

• Move with Urgency: We move quickly, make thoughtful decisions, and keep momentum. We value action over perfection and learn by shipping.

• Take Ownership: We own outcomes, not just our individual work. We make decisions that move the company forward and follow through.

• Communicate Openly: We communicate directly, seek to understand, and create clarity for others. Honest conversations help us move faster together.

• Build Great Teams: We lead by example, empower others, and create healthy teams where people can do their best work.

• Raise the Bar: We're always improving ourselves. We learn from feedback, consistently challenge ourselves to grow, and focus on the work that matters most.

• Think Long-Term: We design for what's next. We create scalable systems, simplify complexity, and use AI and automation to amplify our impact.

What We're Looking For

This is a foundational hire on a newly formed in-house team, owning the procure-to-pay cycle end to end. Payables span GPU and server purchases, colocation and power agreements, network capacity, and a fast-growing operating expense base across multiple sites and states. The accuracy of what you record flows directly into the fixed asset base, cost of revenue and our financial statements. The role includes designing the process, not inheriting it.

What You’ll Do

Procure-to-Pay Operations

• Own full-cycle accounts payable: invoice intake, coding, approval routing, 2- and 3-way match against purchase orders and receiving documentation, and payment execution

• Manage the exception and payment-hold queue as the primary point of resolution, working root causes rather than clearing symptoms

• Execute payment runs across ACH, wire, and card, with disciplined controls around tiered approval thresholds, wire release, vendor bank detail changes, and payment fraud prevention

• Own vendor master data integrity, including onboarding, W-9 and W-8 collection, and periodic review

Capital Expenditure and Infrastructure Spend

• Partner with Infrastructure and Procurement on hardware and data center spend such as deposits and progress payments, shipment and receipt timing, and the documentation needed to establish in-service dates

• Ensure capital versus expense classification is applied consistently at the point of coding, and flag items requiring technical accounting review

• Track construction-in-progress activity and support the roll-forward of capitalized costs

• Flag colocation, hosting, and equipment agreements that may contain embedded leases for accounting review under ASC 842

Close and Accruals

• Prepare the accrual for received-not-invoiced goods and services with focus on completeness, such as variable and high-value infrastructure costs including power, bandwidth, colocation etc. where invoices arrive after close

• Reconcile AP subledger to the general ledger, along with accrued liabilities, prepaid expenses, and…