Head of Finance

Capsa AI Ltd; Greater London; On-site; GBP 180,000 - 270,000; Full time

Job summary

Capsa AI in London is hiring a Head of Finance to build and run the finance function. You will own the financial model, close processes, board packs, and investor updates while partnering with the CEO and founders on commercial decisions and capital strategy.

You will lead FP&A, controls, and financial readiness as the company scales from Series A to Series B and beyond, shaping the function and a small team along the way.

Qualifications

• 8+ years in Finance including Head of Finance, FP&A or Controller leadership at a high-growth B2B SaaS or fintech startup.
• Qualified accountant (ACA, ACCA, CIMA, or US equivalent), with Big Four or top-startup grounding.
• Bachelor's degree minimum from a leading university.

Responsibilities

• Build and run the finance function; lead the company’s financial model and close processes.
• Own board packs, investor updates, and FP&A cadence to enable Series B readiness.
• Partner with CEO and founders on commercial decisions and capital strategy.
• Hire and develop a small finance team and establish key controls and reporting.

Skills

Finance leadership

FP&A

Controller leadership

Big Four experience

Qualified accountant (ACA/ACCA/CIMA)

Education

Bachelor's degree

Job description

The AI Operating System for Private Capital.

Capsa AI

Private capital funds have to find potential investments, research and analyse them thoroughly, monitor them over time, drive improvements, and decide when to buy and sell. They've got to see through the marketing. They've got to outbid the competition. And they've got to learn from every deal they do. Historically, these processes have run on people, we are building the AI Operating System that will run them in the future.

We're focused, ambitious, and obsessed with building a category-defining company. In the last 12 months we've grown ARR 15x, achieved product–market fit with leading multi-billion-dollar PE firms, and expanded across the US, UK, and Europe. Now we're doubling down: we've raised a large Series A from top-tier VC investors to scale the team. We're hiring hyper-talented people who want to work at the forefront of AI and revolutionise an industry.

At a glance

• Role: Head of Finance

• Location: London, UK (Hybrid, in-person 4 days per week)

• Team: Finance & Operations

• Experience Required: 8+ years in finance including Head of Finance, FP&A or Controller leadership at a high-growth B2B SaaS or fintech startup. Qualified accountant (ACA, ACCA, CIMA, or US equivalent), with Big Four or top-startup grounding.

• Compensation: Top of market. Competitive base + OTE

The role

Build and run the finance function. Player-coach today, full leader as the company and team grow under you.

This is the senior-most finance seat at the company. You own the model, the board pack, and the close yourself this year. At the same time you stand up FP&A, controls, and the financial readiness that takes us from Series A to Series B and beyond. You report to the CEO, work in lockstep with the founders, and partner on every commercial and capital decision the company makes.

Player-coach is where the role starts, not where it ends. As you hire, develop a small finance team, and scale the function, the time you spend in the numbers shifts to time you spend building the function. CFO on the runway as we scale through Series B and beyond — the transition is driven by what you build.

The opportunity

• The operating model. ARR, headcount, cost, cash, runway. The single source of truth the board and management run off, built and maintained by you.

• Board reporting and investor relations. Monthly board pack, quarterly investor updates, KPI dashboards. The numbers that go to our investors come from you, signed off and defensible.

• FP&A cadence. Monthly close, variance analysis, rolling forecast, scenario modelling. A tight rhythm the company can plan against, with risks flagged before they hit cash.

• Series B readiness. Lead financial diligence prep, build the data room, support the CEO through the raise. By the time we kick off the process, the numbers are bulletproof and the story is yours too.

• Strategic and commercial partnership. Unit economics, pricing, deal structuring with PE customers. In the room with the CEO and Head of Sales on every commercial decision.

• Controls and oversight. Manage the outsourced stack - accountancy, audit, tax, payroll, UK and US accounting. Clean SaaS revenue recognition that survives Series B diligence.

• R&D tax credits and grants. UK and US claims captured year on year. Material cash.

• Cap table and equity administration. Cap table, option grants, 409A and EMI valuations, board consents. Clean from day one.

• Treasury and cash management. Cash placement, GBP/USD FX, banking relationships, venture debt as Series B approaches. The cash sits with you.

• Team and systems. Hire and manage a small finance team (1–2 reports in 12 months). Set the tooling, the close calendar, and the partnership model with the rest of the business.

Why Capsa

• Exceptional traction. 15x ARR growth in 12 months, PMF with top PE funds managing over $1tn AUM.

• Define the function. First senior marketing hire at a category-defining AI company. Build it, don't inherit it.

• Direct line to the founders. Partner with the CEO and CRO on positioning, narrative, and how Capsa earns the right to be the category leader.

• Backed by the best. Top VCs and senior PE execs from Warburg Pincus, KKR, and Goldman Sachs.

• Major upside. Meaningful equity in a company growing 15x year on year.

Track record

• 8+ years in Finance. Including Head of Finance, FP&A or Controller leadership at a high-growth B2B SaaS or fintech startup. Qualified accountant (ACA, ACCA, CIMA, or US equivalent), with Big Four or top-startup grounding.

• Operator, not just controller. You've owned the operating model and the board pack yourself. You've sat in the room with investors and answered hard questions live.

• Series B+ raise experience. You've supported a CEO through a fundraise. Data room, diligence, modelling, investor Q&A. You know what good looks like and where the traps are.

• Multi-entity, multi-currency. UK and US operations, GBP and USD reporting. Comfortable with the tax and accounting complexity that comes with both.

• Academic foundation. Bachelor's degree minimum 2:1 from a leading university.

How you lead

• Player-coach by instinct. You're equally credible building the model on a Monday and presenting it to the board on a Tuesday. You don't pick one mode and stick to it.

• Strong point of view on commercial trade-offs. You don't just report the number. You have a view on what we should do next, and you can defend it with the model.

• Builder. You're choosing this role because the function isn't built yet, and that's the appeal. Low ego, high ownership, bias for action over committee.

• Direct communicator. You make calls, write them down clearly, and tell the team why. Comfortable disagreeing with the founders and the CEO when you believe you're right.

• Genuinely curious about AI. Using it, breaking it, embedding it into how the finance function runs.

If this opportunity excites you

We'd like to meet you. Initial conversations are direct and substantive, going deep on the work, the team, and what you'd own in the first six months.

Capsa AI provides equal employment opportunities (EEO) to all employees and applicants for employment without regard to race, color, religion, sex, national origin, age, disability, genetics, sexual orientation, gender identity, or gender expression. We are committed to a diverse and inclusive workforce and welcome people from all backgrounds, experiences, perspectives, and abilities.

Capsa AI is committed to a fair and transparent hiring process. We confirm that this advertisement is for an active, existing vacancy within our organization. Please be advised that we may use artificial intelligence-driven tools to assist our recruitment team in screening, assessing, and selecting candidates for this position.