Infiniium Ltd
Head of Finance
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Founding Finance Lead | AI Scale-up | London
Our client is a fast-scaling international AI and technology company headquartered in London, having exponentially grown annual recurring revenue. They're now ready to bring finance in-house for the first time, and this is the hire that makes it happen.
The opportunity
As the company's first finance professional, you'll build the function from scratch: setting up processes, controls and systems, and deciding what to run internally, what to outsource and what to automate. The early focus is hands-on and technical. Once the foundations are stable, the role shifts towards operational leadership, with a team built around you.
What you'll own
Revenue and billing
- End-to-end quote-to-cash: deal and contract structuring, the invoicing platform and invoice generation, collections, cash allocation, revenue recognition and close
- Partnering with engineering and data science to build billing models for usage-based contracts
Automation and systems
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- Removing manual work wherever possible, using AI-driven finance tools and the company's technical talent to keep the function lean
- Supporting new system rollouts and integrations across the accounting stack
Controls, tax and compliance
- Treasury across multiple entities and currencies
- Intercompany recharges, balances and funding, plus transfer pricing documentation alongside external advisers
- Tax and statutory obligations, and adherence to US GAAP, IFRS, internal policy and regulation
- Running the external audit to deadline
- Advising on accounting treatment and writing policies and technical memos for significant transactions
Accounting and reporting
- Overseeing the management accountant and/or outsourced providers
- Preparing financial statements under US GAAP, and IFRS for the UK entity
- Monthly, quarterly and annual close
- Day-to-day AP, AR, payroll accounting and cash
Funding and banking
- Keeping the business investor-ready, with scope to help lead future raises
- Handling financial due diligence requests from customers
- Managing banking and credit facility relationships
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Planning and insight
- Working with FP&A, operations and department heads on analysis
- Budget vs actual reporting and variance commentary
What they're looking for
- A Practice trained qualified accountant (ACA, ACCA, CPA or equivalent)
- At least 8 years in finance, including 5+ in high-growth SaaS and 2+ in a finance leadership role
- A minimum of 2 years handling complex quote-to-cash, ideally bespoke usage-based pricing that varies widely by customer and product
- Strong US GAAP, with working knowledge of IFRS and/or UK GAAP
- A builder's mindset: comfortable designing accounting processes from a blank sheet and shaping systems around how the business actually works
- Genuinely AI-fluent: uses LLMs such as Claude daily and knows the AI finance tooling landscape
- Desirable: 2+ years as a sole finance hire or Head of Finance
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