Interim Financial Controller Job at Harmonic Finance™

Interim Financial Controller

Harmonic Finance™ | Certified B Corp

Location:
United Kingdom , London

Category:
Finance

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

Interim Financial Controller | AI Deep Tech Scale-Up | London/Hybrid. Harmonic are delighted to be partnering exclusively with one of the UK's most exciting start-ups operating cutting-edge AI scale-up in their search for an Interim Financial Controller. Backed by top-tier global investors and experiencing rapid international growth following one of the largest fundraises in Europe in 2025, the organisation is scaling quickly across multiple regions. This role will suit someone who thrives in an agile, innovative environment and enjoys building structure, technical discipline, and high-performing teams within a scaling finance function. The Role: Reporting directly into the CFO, this is a pivotal leadership position overseeing the group's financial operations, technical accounting, and reporting frameworks. You will take ownership of multi-entity consolidation, compliance, controls, and financial governance. The role combines hands-on technical depth with strategic oversight, partnering closely with senior leadership as the business continues its fast-paced global expansion.

Job Responsibility:

Deliver accurate, timely, and comprehensive financial reporting, providing clear insights and commentary to senior stakeholders
Manage the full external audit process, acting as the primary point of contact and presenting outcomes to the Audit Committee and Board
Oversee the consolidation of multi-entity, multi-territory financial results, ensuring consistency, accuracy, and alignment with accounting standards
Lead cash management activities, including cash flow forecasting, FX exposure monitoring, and continuous improvement of treasury processes
Drive efficiency and consistency across AP, AR, payroll, and cash operations, working with teams across different geographies
Oversee compliance across all legal entities and business units, ensuring alignment with relevant accounting, tax, and regulatory requirements
Own the organisation's key accounting policies, including areas such as transfer pricing, capitalisation policies, and complex technical judgements
Define and track clear finance KPIs, ensuring alignment with business priorities and strategic goals
Take responsibility for the financial systems and tech stack, including the ERP and integrations with wider business tools
Partner cross-functionally to enhance financial literacy, operational alignment, and decision-making across the organisation

Requirements:

Fully qualified accountant (ACA/ACCA or equivalent)
Excellent understanding of IFRS and strong technical accounting capability
Experience in a tech based venture capital backed business
Proficiency with Xero

Additional Information:

Job Posted:
January 05, 2026

Work Type:

Hybrid work

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