Commercial Finance Manager Jobs

Harmonic Finance™ | Certified B Corp

Location:
United Kingdom, London

Category:
Finance

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

Commercial Finance Manager (Lead) | AI Deeptech Start-up | London. Harmonic has been retained by one of the most exciting Deep-tech start-ups in Europe to secure their first finance hire. Their disruptive SaaS product is redefining innovation in the Life Sciences space, landing them Series A investment from a leading European Venture Capital Fund that has a track record of early investment into some of the biggest tech success stories of the last decade including Revolut & Wise. Now on the verge of rapid expansion, they are looking for a Commercial Finance Lead to take them through their next phase of growth whilst elevating the strategic contribution of finance to the wider business. The business has a genuinely values led culture with an incredibly bright senior leadership team made up of award-winning scientists and engineers, that promote empowerment, ownership and accountability. Subsequently, you'll be trusted to work autonomously with the wider support of a very dynamic and collaborative team around you. This is much more than an opportunity to join an AI business, but a chance to be at the forefront of multiple technological leaps which can change the shape of human history. As a commercial partner to the leadership team, the Commercial Finance Manager will work closely with the Founder and Executive team, as well as external advisors, to deliver high-quality financial insights and support data-driven decision-making. This is a high-impact, strategic finance role with the opportunity to shape the function with scope for progression into an FD/CFO role in the future.

Job Responsibility:

Support the Founder/CEO with board materials and investor updates
Deliver high-quality management information and performance KPIs
Review monthly financials with the Exec team, providing commercial insight and recommendations
Manage banking relationships and optimize cash yield post-Series A
Oversee working capital, including receivables, payables, and cashflow
Lead procurement and vendor management to ensure cost efficiency and value for money
Enforce cost discipline and expenditure control in line with budget priorities
Maintain and enhance financial forecasting and budgeting models
Lead monthly budget vs. actual reviews with leadership
Support scenario planning and business case development for strategic initiatives
Oversee procurement policy compliance and cost control
Provide commercial insight on pricing, profitability, and market expansion opportunities
Support expansion initiatives, including pricing analysis, product economics, and new market entry
Partner with cross-functional teams to drive data-informed decision-making
Oversee the monthly close process with the outsourced accounting partner
Ensure accurate and timely invoicing of all SaaS and service revenues
Manage financial compliance (tax, R&D claims, VAT, share options, HMRC reporting)

Requirements:

Qualified accountant (ACA, ACCA, CIMA or equivalent) preferred
Proven experience in a high-growth start-up or tech environment
Highly collaborative and strong business partnering skills with the ability to build relationship with colleagues across different departments
Ability to be dynamic and operate both as part of a team and autonomously when necessary
Ability to be hands-on in your approach, not shying away from getting down in the detail when necessary
Extremely analytical mindset with a high attention to detail

Nice to have:

Previous experience in SaaS, AI or Deeptech space

Additional Information:

Job Posted:
December 09, 2025

Employment Type:

Fulltime

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Commercial Finance Manager