Finance Operator in Residence (Order-to-cash)
About the role
AI transformations for enterprise finance with Rex, focusing on order-to-cash. You will act as subject matter expert for order-to-cash, run customer operations alongside AI agents, review agent actions, handle exceptions, and help shape product and agent behavior for enterprise finance workflows.
Responsibilities
- Be the team’s subject matter expert on order to cash and help run customer operations alongside Rex’s agents.
- Bring practical knowledge of billing, collections, cash application and reconciliation into how we build the product and configure agents for each customer.
- Day to day, review and approve agent actions, handle exceptions and resolve cases that need human judgment.
- Work closely with customer finance teams to understand their policies, investigate payment blockers and keep the work moving.
- Turn what you learn into clearer procedures and better agent behaviour, working directly with engineering.
Qualifications
- Around 2-3 years of hands-on experience in order to cash, AR or credit control, ideally at enterprise scale.
- Comfortable with customer ledgers, payment allocation, reconciliation and ERP systems.
- Ability to work through complex cases and explain reasoning clearly to customers and engineers.
Skills
About Rex
AI Operations Partner for Enterprise Order to Cash
Rex is an AI-native service for order to cash. We replace people-heavy operations with AI agents that continuously manage invoices, customers and exceptions. Order to cash is a $60B outsourced function because the work is too messy for traditional automation. Every customer has different context, exceptions do not follow clean rules, and the next step is often buried in emails, portals, handoffs, or someone’s memory. Rex agents run continuously in the background and resolve work to SLA standards so cash keeps moving. We're live with pre-IPO tech companies, managing >$500m in receivables from F100 companies, cutting manual follow-up cycles from weeks to hours. We founded Rex after spending four years building Sequence, an a16z-backed finance ops platform, from zero to Series A — where we saw firsthand that at-scale, O2C still runs on manual labour. Rex is the #1 winner of the Vercel AI Accelerator out of 2,500 teams, selected by Guillermo Rauch and leaders from OpenAI, Anthropic, Browserbase and more.
More open roles at Rex
- Founding AI Engineer (Enterprise Finance Operations)3w agoHybrid (London) · Engineering