Finance Manager (First-Mover) | High-Growth Series A Fintech Start-Up | London / Hybrid

The Client

Harmonic is delighted to be representing a high-growth Series A fintech with a strong consumer following and an expanding enterprise client base. They are one of Europe's fastest growth Tech scale-ups and are now scaling internationally. The business is at an inflection point: commercial momentum is accelerating and the finance function needs to grow with it.

The Role

Reporting directly to the FD, the Finance Manager will own everything accounting and operational finance related. Month-end close, FX settlements, statutory compliance, investor reporting, and cash management. As with any start-up, this is a role with genuine breadth and genuine ownership from the start.

They are actively looking for someone making their first move from practice, and this is an outstanding company to do so. You will get the kind of industry experience that typically takes years to accumulate, compressed into a fast-moving environment where automation is actively being utilised and there is real scope to shape how finance operates. The FD is committed to strong mentorship and developing this person into the Financial Controller role as the business scales; there is a clear and credible path.

Key Responsibilities

• Lead month-end close, including journals, reconciliations, and preparation of management accounts
• Own daily FX settlements and house account treasury reconciliations
• Prepare monthly financial and operational reporting for investors and senior leadership
• Manage supplier invoice reconciliations, cost allocations, and the relationship with external bookkeepers
• Support annual budgeting and rolling cashflow forecasting
• Assist with year-end statutory accounts, corporation tax, and quarterly VAT returns
• Prepare and submit FCA regulatory returns
• Business partner with internal teams on P&L reviews and cost optimisation
• Collaborate with the FP&A and data science team on commercial and operational analysis
• Other ad hoc analysis and duties

Requirements

• ACA qualified, with a practice background
• Audit or advisory experience with financial services, fintech, or SME clients; direct client-side exposure valued
• Comfortable taking ownership without waiting for perfect process or structure
• Strong Excel and analytical skills; confident working across multiple data sets
• Clear ambition to grow into a Financial Controller role
• FX, treasury, or cross-currency reconciliation experience (from practice or otherwise)
• Experience using AI or automation tools in a finance or audit context
• Xero or similar cloud accounting platform
• Any exposure to FCA-regulated businesses or payments infrastructure

Location

Central London (4 days Mon-Thu in office, Friday remote)

Start Date

Flexible

At Harmonic, we are dedicated to fostering an inclusive and equitable workplace. We actively welcome applications from individuals of all backgrounds and assure you that every candidate will be thoughtfully considered for the roles we represent, without regard to race, religion, gender expression, disability, or sexual orientation.