Join to apply for the Part-time Finance Manager role at Core3 | B Corp
Join to apply for the Part-time Finance Manager role at Core3 | B Corp
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This range is provided by Core3 | B Corp. Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.
Base pay range
Job Title: Financial Manager (Part-Time)
Location: Hybrid (London HQ + remote flexibility)
Reporting to: Co-Founders
Type: Part-time (1-2 days/week, flexible schedule)
Our client is a fast-scaling, founder-led fintech. 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
Seniority level
* Seniority level
Mid-Senior level
Employment type
* Employment type
Part-time
Job function
* Job function
Accounting/Auditing
* Industries
Investment Management
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