Group Financial Controller VC-Backed SaaS Start-up London (Hybrid) The ClientHarmonic is delighted to be working with a fast-growing, VC-backed SaaS business that has built a category-defining, AI native product already well known across the finance profession. Backed by Tier 1 VCs and targeting 5x ARR growth this year, the business is scaling rapidly and expanding internationally.The culture is fast-moving, engineering-led, and genuinely obsessed with building things well. They treat finance as a product problem, not an administrative one. The team is small, the decision-making is fast, and the opportunity to have real impact from day one is significant.The RoleThis is a building role at the forefront of what it means to run a modern finance function. You will be operating with and embedding the most advanced AI tools available on the market today, using them to design and automate processes from the ground up rather than inheriting a legacy stack.As the first dedicated finance hire, you will own the complete accounting function across multiple jurisdictions from day one. The expectation is not that you become the person who executes the close indefinitely, it is that you build systems and automations that make your involvement in the mechanics largely unnecessary. The ambition is day-one monthly close, a compliance calendar that runs itself, and a finance function that over time shifts its weight from core accounting into FP+A and commercial insight.You will report to the H