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Supporting Senior Finance Leaders in Building High-Performing Teams | Director of London @ Core3 Ethical recruitment for Finance & Accounting…

Job Title: Financial Manager (Part-Time)

Our client is a fast-scaling, founder-led fintech redefining how global debt capital markets operate. Their platform is already trusted by multiple global banks and backed by leaders across banking, law, and technology.

With a high-performance culture and precision mindset, they deliver enterprise-grade solutions in a sector still run on legacy infrastructure. This is a unique opportunity to join a mission-driven company with a clear product-market fit, elite client base, and runway for growth.

We believe in high standards and high trust. You'll work alongside ambitious, thoughtful people in a flexible environment where impact is what counts.

How you’ll make an impact

They are hiring a part-time Financial Manager to own and elevate the finance function. This is a hands-on, detail-oriented role ideal for someone who thrives in fast-paced, high-integrity environments.

You'll lead the day-to-day financial operations, ensure clean, compliant records, and provide clear reporting to founders and the board. You’ll also bring a strong control mindset — proactively managing risk, spotting issues early, and delivering insights that support strategic decisions.

If you're a sharp, experienced finance lead who wants to make a real difference — without the grind of full-time hours — this role offers challenge, autonomy, and influence.

Key Responsibilities

Core Finance & Control

• Oversee all transactional accounting: invoicing, AP/AR, payroll, expenses, reimbursements, and credit control
• Manage monthly bookkeeping and reconciliations (bank, cards, Xero)
• Prepare and maintain the general ledger and journal entries (accruals, prepayments, depreciation)
• Handle cash flow tracking, burn rate, and liquidity management
• Own financial workflows and controls across billing, approvals, and payments

Reporting & Insights

• Lead month-end and year-end close, coordinating with our accountants
• Deliver internal reports on budget vs. actuals, performance by product or function, and key KPIs (CAC, CLTV, margins, runway, ROA/ROE)
• Prepare board and investor materials on financial performance
• Provide ongoing cash forecasting and scenario planning

Tax & Compliance

• Oversee VAT, PAYE, HMRC filings, and ensure MTD compliance
• Support international tax considerations (e.g. FX, transfer pricing if applicable)
• Ensure all compliance requirements are met, accurately and on time
• Liaise with HMRC and external accountants as needed

Payroll & Employee Expenses

• Check the payroll processing (incl. pensions, HMRC returns, and payslips)
• Manage expense reimbursement flows, mobile receipt capture, and approval layers
• Maintain employee finance records (leave, deductions, benefits, etc.)

What We're Looking For

Must-Have Experience

• 5–10+ years in financial management, ideally in high-growth or regulated environments
• Use of Xero would be beneficial, including payroll, reporting, reconciliations, and bank feeds
• Strong understanding of UK tax, HMRC, and VAT processes
• Experience delivering high-precision reporting to founders or boards
• Meticulous attention to detail, with a proactive and solution-focused mindset
• Able to work autonomously, prioritise intelligently, and flag risks early

Bonus Points For

• Experience in fintech, SaaS, or financial services
• Familiarity with Stripe, PayPal, Dext, ApprovalMax, or similar tools
• Exposure to international tax issues and multi-currency environments
• Confidence building light-touch automation and approval flows in Xero

Why our client is excited about you

• Strategic seat at the table: Partner directly with founders and shape financial decision-making
• Elite clients: Work with global banks, top-tier financial institutions and law firms
• True flexibility: Set your own hours - remote/hybrid options
• High-performance culture: Smart, focused, ambitious team doing meaningful work

Please apply or send your updated CV to stuart@core3.co.uk

Seniority level

• Seniority level

  Mid-Senior level

Employment type

• Employment type

  Part-time

Job function

• Job function

  Accounting/Auditing

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