Ar & Billing Specialist

About Darkroom
About Darkroom Darkroom ( Darkroom Digital, Inc.) is the leading next-generation growth marketing firm engineering the brands of tomorrow. Founded in ****, we set out to redefine what a modern agency could be, by replacing the inertia of legacy advertising behemoths with a model built for speed, intelligence, and measurable impact. At our core, Darkroom is a human services company powered by Shadow, a universal AI commerce layer that integrates executive-level strategy with proprietary agentic technology. This fusion enables our teams to deliver outsized returns by enhancing creative output, operational efficiency, and revenue generation across every stage of the customer journey. Our track record speaks for itself: billions in attributable revenue driven across e-commerce marketplaces, media networks, DTC ecosystems, and social commerce platforms. Every engagement feeds into our proprietary data infrastructure, enabling a continuous feedback loop that accelerates growth, improve margins, and compounds results across our client portfolio. What began as a boutique design studio has evolved into one of the fastest-growing private companies in America (Inc. ****) and among the most effective performance media agencies of the ****s (Varos). Our founders were recognized by Forbes 30 Under 30 for advancing the intersection of technology, marketing, and advertising, cementing Darkroom 's role as a defining player in the future of media innovation.
About the Role
Darkroom is hiring an AR & Billing Specialist to join the Finance team. You'll own billing, collections, accounts payable, creator payments, and cash visibility across more than 80 client accounts and around 100 invoices a month. You'll report to the SVP of Finance and work closely with the Finance Operations Manager, who sets our collections strategy, as well as our account leads and external bookkeeper. This is not a reminder-sending role. We want someone who knows every account, spots payment risk early, and decides how to approach each client so we get paid on time without damaging the relationship. This role is built for someone who sees AI as a core part of how finance gets done. You'll use tools like Claude to check calculations, automate repetitive billing and follow-up work, and build workflows that raise both the speed and accuracy of our output. This is a fully remote role supporting a team in the EST time zone (9 AM-5 PM EST).
What You'll Do
Prepare and issue all client invoices each cycle, including recurring retainers, one-off projects, variable and performance fees, and hourly web-support work.
Reconcile tracked hours and variable-fee calculations against contracts and scopes before invoices go out.
Keep the billing schedule current as clients start, change scope, pause, or offboard.
Own collections execution end to end: run the follow-up calendar, manage AR aging and days sales outstanding, and follow the collections strategy set for each account.
Carry out the approach set for each account, such as one consolidated reminder before the due date, a call with the client's finance team, or bringing in the account lead, and recommend changes when an approach isn't working.
Join the daily cash flow check-in led by the Finance Operations Manager.
Flag at-risk accounts early, such as slipping payment patterns, disputes, or unresponsive contacts, with a recommended action.
Prepare the weekly cash and AR report, and draft the cash and collections section of the monthly report.
Keep the weekly cash forecast current, with expected receipts by client and by week.
Run accounts payable in Ramp: enter vendor bills, check them against approvals and contracts, schedule payments, and keep vendor records current.
Pay creators, partners, and referral payouts in Ramp once amounts are approved, and keep payee records current.
Record invoices and payments in QuickBooks, working alongside our external bookkeeper.
Peer-check teammates' work, such as reported MRR and client data against billing records.
Maintain and improve our collections playbook and billing processes.
You Should Apply If This Sounds Like You
You have 2-4 years of experience in accounts receivable, accounts payable, billing, or collections, ideally at an agency, professional services, or SaaS company with US clients.
You have hands-on experience with QuickBooks Online.
Experience with Ramp or a similar AP tool is a plus.
You're strong in Google Sheets or Excel, including lookups, pivot tables, and reconciliations.
You have a high bar for accuracy. Invoices you send are right the first time.
You're a confident communicator, polite but firm with US client contacts, by email and on calls.
You have good judgment about people and priorities.
You know when to push, when to escalated, and when to wait.
You take initiative. You raise problems together with a proposed fix instead of waiting to be told.
You use Claude or similar AI tools in your work, or you're eager to.
You're fluent in written and spo
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