Manager, Accounting & Finance Operations

About Lumafield:

Lumafield was founded in 2019 to upgrade manufacturing.

We are engineers with deep experience across the product development cycle, from initial ideas to shipping hardware, across industries and specializations, who became frustrated by the cost and complexity of modern manufacturing. So we decided to upgrade it.

Engineers make million-dollar decisions every day, and they need tools that give them the greatest possible insight into their products. By offering unprecedented visibility into products, as well as AI-driven tools that highlight problems and generate quantitative data, Lumafield promises to revolutionize the way complex products are created, manufactured, and used across industries. We started with industrial CT scanning, which for us was the most valuable but underutilized tool in the manufacturing toolbox, enabling us to rapidly inspect essential components non-destructively.

We rebuilt the whole system, from X-ray capture, to computer vision analysis, to web-based collaboration, to the entire business model, making the most advanced manufacturing tech more accessible to every industry. Our company, like our platform, is designed for upgrades. We’re building for greater intelligence, autonomy, and speed. For deeper vision, operational excellence, and powerful insights. And then we'll upgrade it all again.

Lumafield is headquartered in San Francisco, CA. and has an office in Cambridge, MA. 

About the role:

Lumafield is seeking a Manager, Accounting & Finance Operations to join our growing Accounting team. Reporting to the Head of Accounting, this is a hands-on role at the intersection of accounting, finance operations, and systems.

A primary value driver of this role is cash: you will own collections and be accountable for converting receivables to cash quickly and predictably. You'll also own AP strategy, continued system setup, and ongoing system maintenance, building out the function in Ramp with a Staff Accountant supporting day-to-day AP operations.The right candidate has a builder mindset and enjoys turning complex, manual, or undefined processes into scalable, well-controlled workflows and audit-ready workpapers. You'll use AI tools, including Claude, to automate recurring work and continuously improve how the Accounting team operates.

What you'll do:

Collections & Accounts Receivable

Own and actively manage AR and collections as a core day-to-day responsibility, including billing and invoicing, monitoring AR aging, driving customer follow-up, resolving overdue balances and payment issues, and ensuring timely cash application.

Drive improvements in cash collection and AR performance by establishing effective collection cadences, tracking key metrics, and partnering closely with Sales and Customer Success to resolve disputes and accelerate payment.

Be accountable for AR performance, including DSO, aging by bucket, past-due balances, and cash forecast accuracy, reported regularly to Finance leadership.

Build direct relationships with customer AP and procurement contacts to resolve billing questions, portal and PO issues, and payment blockers before they delay cash.

Establish credit and collections policies, including customer credit review, payment terms, hold and escalation criteria, and bad debt reserve methodology.

Automate collections workflows with AI and AR tooling, including dunning sequences, invoice delivery and portal submission, and payment reminders.

Accounts Payable & Purchasing

Own the overall AP and purchasing function, including the strategy, systems, processes, and controls needed to scale with the business.

Partner closely with the Staff Accountant, who runs point on day-to-day AP processing; provide reviewer-level oversight of invoice coding, approvals, payment runs, vendor setup, and 1099 compliance.

Build and improve scalable purchasing controls and workflows, including vendor onboarding, PO requesting, open PO management, and purchase accruals.

Lead the transition from Teampay to Ramp and own Ramp's buildout across bill pay, purchasing, approval workflows, virtual cards, and vendor management.

Own and continuously improve Ramp and its integration with NetSuite, including workflows, GL mappings, automation, troubleshooting, and ensuring complete and accurate data flow into the GL.

Systems & AI

Own maintenance of AP systems (Ramp), AR/Revenue systems (currently Maxio), Sales Tax (Avalara), and their integrations to NetSuite.

Leverage AI tools, including Claude, to turn recurring work (contract and invoice review, coding, reconciliations, flux analysis, audit support) into documented, reusable workflows with appropriate review points and controls.

Revenue & Sales Tax

Own monthly revenue recognition under ASC 606, including contract review, revenue schedules, deferred revenue roll-forwards, and related reporting.

Own sales tax reporting and compliance, including coordination with third-party tax providers and resolution of sales tax issues.

Continuously improve and scale revenue and AR processes through AI and automation, standardizing workflows, reducing manual work, and building repeatable processes and controls. Once onboarded, lead the transition from Maxio to a new revenue and AR platform, including a NetSuite integration built to scale with revenue growth.

Month-End Close & Audit

Support with key areas of the monthly close, including revenue, AR, AP, COGS, prepaids, fixed assets, and leases, with related balance sheet reconciliations, flux analysis, and supporting workpapers.

Build and maintain audit-ready workpapers that clearly support account balances, key judgments, and conclusions.

For areas you own, prepare audit schedules and serve as a primary contact for external auditors.

Document and maintain processes and internal controls for each area you own.

About you:

Bachelor's degree in Accounting or Finance; CPA a plus.

5–8 years of progressive accounting experience, ideally combining public accounting/audit with operational accounting at a high-growth company.

Strong US GAAP knowledge, including ASC 606 and ASC 842.

Hands-on experience owning collections and AR with measurable results (e.g., reduced DSO or past-due balances); comfortable on the phone and in customer AP portals.

Experience owning revenue operations and overseeing AP and purchasing.

Experience preparing audit-ready workpapers and working directly with external auditors.

Experience administering finance systems and GL integrations; NetSuite and Ramp preferred.

Track record of building and documenting scalable accounting processes and controls.

Experience using AI tools in accounting or finance, with an interest in building repeatable workflows.

Understands how transactions flow end to end across systems and teams.

Experience in a hardware, manufacturing, or mixed hardware/software business preferred.

Lumafield offers both competitive cash and equity compensation, as well as a health & wellness stipend, 401k, parental leave, flexible PTO, commuter benefits, company wide events and more! 

Lumafield is committed to building a team that represents a variety of backgrounds, perspectives, and skills, because the more inclusive we are, the better our work will be. Do you feel like your skills don’t meet every single requirement listed? We encourage you to apply anyway – If you’re excited about our technology, the opportunity, and are eager to learn more we’d love to hear from you!  

In keeping with our beliefs and goals, no employee or applicant will face discrimination or harassment based on: race, color, ancestry, national origin, religion, age, gender, marital domestic partner status, sexual orientation, gender identity, disability, genetic information or veteran status. 

Reach out if you want to be a part of what we are building.