Senior Accounts Payable & Receivable Specialist (6-month fixed-term contract)

About Improbable Improbable is a venture builder and technology company creating and scaling businesses in Web3, blockchain, and decentralised infrastructure. We build companies from the ground up and invest in ventures shaping the next generation of the internet.

We are developing next-generation networked and decentralised systems that power digital assets, open networks, and Web3-native economies. Over the past decade, we’ve evolved into a global leader in venture building and blockchain-enabled infrastructure, enabling creators, brands, and communities to build and scale decentralised products at global scale.

At Improbable, we’re motivated by solving hard, meaningful problems, building technology that is ambitious, durable, and transformative. The Role We are seeking a highly organised and detail-oriented Senior Accounts Payable & Receivable Specialist to join our Finance team, on an initial 6-month fixed-term contract, with the opportunity to transition into a permanent role.

Reporting to the Finance Operations Manager, you'll be at the heart of our Finance Operations team, taking ownership of core Accounts Payable and Accounts Receivable processes while supporting month-end close and helping drive operational excellence across the function.

This is an exciting time to join the team. Alongside the day-to-day finance operations, we're transforming our Procure-to-Pay (P2P) processes through AI driven automation and systems improvements. You'll play an active role in supporting this transformation by helping shape new ways of working, embedding and testing new processes, and identifying opportunities to increase efficiency across the finance function.

This is a hands-on role for someone who enjoys taking ownership, working collaboratively, and seeing tasks through to completion. You'll thrive in this role if you enjoy working in a fast-moving environment where priorities evolve, no two days are the same, and you'll have the opportunity to build, improve, and influence how Finance operates.

The Opportunity Accounts Payable Own the end-to-end Accounts Payable process, including finance mailbox management, invoice processing, bank reconciliations and payment runs. Ensure invoices are accurately coded, approved, and processed in line with company policies and internal controls.

Partner with Procurement, budget holders, suppliers, and other stakeholders to resolve queries, ensure timely approvals, and maintain efficient payment processes. Manage corporate card and employee expense processes, including Spendesk and Expensify administration.

Reconcile expense and card transactions, ensuring accurate coding and supporting documentation. Contribute to the ongoing automation of our Procure-to-Pay (P2P) processes and wider finance transformation initiatives. Identify opportunities to improve controls, streamline workflows, and reduce manual effort through automation and AI.

Accounts Receivable Own day-to-day Accounts Receivable operations, including customer invoicing, AR mailbox management, and maintenance of AR trackers. Reconcile customer accounts and statements, resolving invoicing and payment discrepancies in a timely manner.

Prepare and review aged debtor reports on a weekly basis, and proactively follow up on overdue balances to support cash collection, escalating where necessary. Attend and lead billing review calls, working through adjustments with stakeholders before invoices are posted.

Liaise with internal teams and customers to resolve invoicing or payment related queries, and support month-end and year-end close activities. Month-end Support month-end and year-end close through timeline AP and AR ledger reconciliations Post and reconcile journals relating to Spendesk, Navan, Expensify, and corporate credit cards.

Review aged creditor and aged debtors balances and investigate long-outstanding or unusual items. Contribute to the continuous improvement of month-end close timeline Why you're made for this 5+ years' experience in a hands-on Finance Operations role with responsibility for both Accounts Payable and Accounts Receivable, ideally within a fast-paced environment.

A solid understanding of core accounting principles and double-entry bookkeeping. An accounting qualification (or studying towards one) is a strong plus. Excellent attention to detail and a genuine pride in delivering accurate, high-quality work.

Strong Excel and Google Sheets skills, with confidence working with large datasets, reconciliations, and financial reporting. Comfortable embracing AI and automation tools to improve the way work gets done, with a curiosity for new technologies and smarter ways of working.

A proactive problem solver who enjoys improving processes, challenging the status quo, and finding opportunities to make Finance more efficient and scalable. Comfortable taking ownership, working independently, and making sound decisions in a fast-moving environment where priorities can evolve.

A collaborative approach, with the confidence to build strong relationships across Finance, Procurement, and the wider business. Able to hit the ground running, adapt quickly to new systems and processes, and make an immediate impact. Experience with NetSuite (or a similar ERP) and finance tools such as Spendesk, Expensify, Zip, or equivalent is advantageous.

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