Harmonic Finance™ | Certified B Corp
Finance Manager | Series A Consumer AI-Native Scale-Up | Central London | Up to £75k + Equity
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Finance Manager | Series A Consumer AI Scale-Up | Central London | Up to £75k + Equity
The Client
We are partnering with a Series A consumer AI business. The product looks simple from the outside, but underneath it is one of the most ambitious agentic AI systems being built in the UK today.
Launched in 2024, they are growing more than 2,000% year on year toward c.£35-40m revenue next year, hold an NPS consistently above +70, are a certified B Corp, and are backed by a top-tier venture fund alongside angel investors who sit behind some of the world's best-known technology companies.
The Role
This is a deliberately hands-on and technical hire, reporting directly to the Head of Finance. You will own the engine room of finance: high-volume reconciliations running to thousands of transactions a month across customers and suppliers, the invoicing cycle, finance operations end to end, and the month-end close. Alongside that you will design the controls, systems and automation that let the business scale with near-zero defects, and prepare it for its first external audit. It is a genuine controller-track role, and the path to Financial Controller is clear for whoever gets this right.
Key Responsibilities
- Own the high-volume reconciliations at the heart of the business, ensuring customer, supplier and partner transactions reconcile cleanly at scale
- Manage the invoicing cycle across the supplier and partner base, keeping it accurate, timely and well controlled
- Take ownership of finance operations end to end, including customer payments, partner payouts and supplier fees
- Lead the month-end close and produce management accounts the leadership team can rely on
- Build automation into finance workflows using modern data and AI tooling as volumes grow
- Design and embed financial controls across payments, approvals and vendor management
- Prepare the business for, and help lead it through, its first external audit
- Partner with engineering, product and go-to-market teams to design low-touch, automated finance processes
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Essential Experience
- ACA, ACCA or CIMA qualified
- Either a first move from practice (Big 4, or a firm auditing high-growth tech) or a strong industry background
- A clear, demonstrable record of high performance, whether academic, professional or both
- A STEM or otherwise analytical background, and genuine comfort in the detail of reconciliations, invoicing and month-end
- Hands-on familiarity with databases and data tooling such as Power BI, Looker, Omni, Amplitude or Tableau, beyond Excel and traditional accounting systems
- High agency and first-principles problem solving; a lot of this role has no ready-made playbook
- A genuine appetite for in-office working. This is a high-performance, office-first culture; 4 to 5 days on site is a firm requirement
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Desirable Experience
- Active use of AI tooling in your day-to-day work
- Exposure to high-volume transactional businesses: marketplaces, fintech, energy or consumer technology
- Experience building or improving finance processes alongside product and engineering teams
- Exposure to a first audit, or to building controls in a scaling business
Package
- Salary: Up to £75,000 + equity
- Location: Farringdon, London; 4 to 5 days in office
- Start Date: October ideal; open to up to three months' notice
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.
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