Financial Controller

What is Flagstone?

Flagstone is many things. An online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. A diverse group of people, bound by a collaborative spirit, and shared purpose. And lastly, a thriving, profitable business – where smart people do their best work.

Each definition shares a common thread: our unique culture. It’s our pride and joy. And our competitive advantage.

A feel for our culture:

To revolutionise the savings market, we need to be at our best. But high performance takes more than talent – it takes a culture of kindness, respect, and growth.

That’s why we’re building a diverse, inclusive community, where your voice is heard and valued. Where, with close support and room to develop, you can surpass even your own expectations. And be rewarded for it.

We may not change the world, but we can change the world of financial technology. And all it takes is a winning mix of drive, talent, and empathy. Our culture celebrates all three.

But enough about us. Let’s talk about you.

Does this sound like you?

You’re a qualified accountant who enjoys being close to the numbers and close to the business. You’ve run month-end, the balance sheet, and financial controls end to end, and you know what good controls look like in both complex and fast-growing environments. You stay calm under pressure, explain finance simply to people outside it, and you’re always looking for smarter, more automated ways of working.

What you'll do

You’ll run Flagstone’s day-to-day core finance operations, making sure our numbers are accurate, controlled, and on time. Reporting to the Finance Director, you’ll own the month-end close, the balance sheet, and day-to-day financial control, while our FP&A team owns planning and forecasting. As the Finance Director’s right hand, you’ll run the detail so they can focus on supporting the CFO, the Board, and commercial decisions. It’s a hands-on role that will grow in scope and complexity as Flagstone scales.

This will include:

• Running the month-end close end to end and delivering accurate, timely management accounts

• Keeping a clean, fully supported balance sheet, with reconciliations, accruals, prepayments, and journals in order

• Making sure direct-to-consumer and business revenue is recorded accurately, with commercial terms in contracts correctly reflected in revenue and cash

• Managing daily cash and liquidity monitoring, so the Finance Director always has a clear view of our position

• Owning financial controls that fit our scale and regulatory environment, including our obligations as an Authorised Payment Institution

• Preparing for the annual statutory audit, and delivering VAT returns, tax compliance, Companies House filings, and HMRC reporting

• Making sure monthly payroll and benefits are processed accurately, supported by clear standard operating procedures

• Working closely with teams across the business, including Product and Engineering on software capitalisation, Compliance, People, Legal, Sales, Data, and Transaction Operations

• Deputising for the Finance Director and supporting the team during peak periods

• Using automation and AI to shorten the close, reduce manual work, and help build a technology-enabled finance function

What you'll bring

• ACA or ACCA qualified, with solid post-qualified experience running month-end, balance sheet, and financial controls

• Strong technical accounting knowledge and the pace to deliver to tight deadlines

• Experience in a complex environment with good controls discipline, as well as in a smaller, fast-growing business

• Experience with a modern cloud ERP system, with Workday Financials a significant advantage

• A sharp eye for detail and good commercial awareness, spotting when numbers and contracts differ and following it through

• Strong organisation, with the ability to manage competing priorities and adjust quickly

• Clear, direct communication that builds trusted relationships across teams, and the ability to explain financial information simply to non-finance colleagues

• An empathetic, approachable style, helping other teams get things right rather than just flagging what’s wrong

• Resilience through month-end, audit, and shifting priorities, and the confidence to challenge constructively, including at senior level

• Ownership of outcomes, sound judgement on when to act and when to escalate, and a drive to keep finding better ways of working

• Direct-to-consumer experience is helpful but not essential

   

How we reward you:

At Flagstone, the benefits extend beyond false gifts like “fruit and snacks”. Instead, we invest in your health, wealth, and professional development. Here’s a selection of our benefits:

• Hybrid working - Spend at least 1 day a week with your team in our collaborative London office

• Competitive bonus scheme - designed to reward and recognise high performance

• Flexible benefits budget - a pot to fund meaningful benefits for you, whether it's hormone or fertility testing, cancer screening, neuro-diversity coaching or something that matters for you.

• A range of salary sacrifice options to help you make tax efficient savings on electric cars, nursery schemes, home and tech goods.

• Working Abroad - Flagstone employees can work remotely from an approved list of locations for up to 90 days a year

• Mental wellbeing support – Access therapy and mental health sessions through Spill

• Learning and development – £1,000 personal development budget to help you grow in your role.

• Private health care - Enjoy all the benefits AXA has to offer, including reduced gym memberships and medical history disregarded

• Medical cash plan - To help you with the costs of dental and optical expenses

• Life insurance and Income Protection- four times your annual salary for peace of mind

• Matched pension contributions up to 5%

• 25 days holiday - plus bank holidays, well-being days and volunteering days

• Enhanced Parental Leave – enhanced maternity, paternity and adoption pay.

   

All are welcome.

At Flagstone, we’re assembling a diverse team that defies our industry’s norms. Think this role could suit you? We encourage you to apply, no matter your background.

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