Harmonic Finance™ | Certified B Corp
Finance Manager (AI Native) | VC Backed SaaS | London / Hybrid
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Finance Manager (AI Native) | VC-Backed SaaS | London / Hybrid
The Client
Harmonic is exclusively partnering with a fast-growing, VC-backed enterprise software business that helps large organisations automate complex, high-stakes operational workflows using AI. Their products are used by major enterprises across sectors.
- Around 40 people
- Ambitious growth targets to go from £5m to £15m ARR this year
- A culture that is genuinely technical across every function
- They don’t just talk about AI - they build it
- They want to run their own finance and operations function the same way they sell their product: AI-native, systemised, and lean
This hire is a major investment in building the finance function to be the engine room for the whole business, and there is real scope to shape what it becomes.
The Role
Reporting directly to the CFO, the Finance Operations & Systems Engineer will own the operating reality of finance as the sole hire below CFO level. The financial infrastructure is already live: an AI-native ERP, payroll integrated, primary banking connected, balance sheet reconciled. You are not here to select tools or manage a migration. You are here to take what is built to its full potential.
That means automating the close and the cash engine; building a live, accurate quote-to-cash pipeline from CRM through to collections; acting as commercial partner to the engineering team on cloud and compute costs; and progressively building the FP&A layer that brings a forward view of ARR, burn, and unit economics to exec decision-making. You are also Customer Zero: the first internal deployer of the business's own AI Digital Workers into live finance workflows. The CFO retains board-level relationships, the next raise, statutory sign-off, and technical accounting calls. Everything operational is yours.
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Responsibilities
- Own the month-end close end-to-end and engineer it so the majority runs automatically, targeting books closed within a week.
- Manage and develop the AI-native ERP (Light), owning the systems roadmap and leading the organisation through new automation-first ways of working.
- Build and maintain a live, automated daily cash position across UK and US entities, with a rolling forecast you trust.
- Own the quote-to-cash pipeline end-to-end: HubSpot through invoicing, deferred revenue recognition, and collections, with ARR a live and reconciled number.
- Build and own the FP&A layer: rolling forecasts, scenario modelling, and unit economics that feed exec and board-level decisions.
- Business partner to the engineering team: own cloud spend, inference costs, compute, and model costs; translate technical spend into margin analysis the business can act on.
- Own sales compensation analytics and commission calculation mechanics; support sales contracting as a gatekeeper of deal economics entering the ledger.
- Deploy the business's own AI agents into live finance workflows, from commission calculation to cash-flow forecasting.
- Working with external accountants, lead audit prep, first-pass IFRS 15 and IFRS 2 mechanics, and integration of equity management tooling into the financial stack.
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Experience Requirements
Essential
- A strong academic background from a leading university.
- 2 to 4 years in finance systems, technical finance operations, RevOps, or an analytical or operating role with heavy systems exposure. Builders, not ledger accountants.
- Hands-on experience inside an ERP, with an understanding of what clean quote-to-cash architecture looks like.
- Agent-first automation mindset: you build agents, not just configure trigger-action workflows. Fluent from no-code tools (n8n, Make) through to code when a workflow outgrows it. You automate first and hire second.
- Genuinely AI-native by default, and able to bring a wider team along with you.
- Comfortable working alongside engineering and data teams, reading technical documentation, and debugging a broken integration.
Desirable
- CIMA, CFA or equivalent accounting accreditations(completed or in progress).
- HubSpot to ERP integration experience.
- Basic SQL or Python.
- SaaS revenue recognition (IFRS 15 / ASC 606) or equity accounting (IFRS 2).
Salary: £65,000 – £80,000 + considerable share options
Location: West London, 3 days in office / 2 days remote
Start Date: Notice periods considered
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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