Accounts Assistant - 6 month FTC

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.

The Finance Team

Our Finance function is led by the CFO and structured across two specialist areas: FP&A, which partners with the business on planning, forecasting and commercial decision-making; and Financial Control, which owns the integrity of our numbers, core operations, and financial controls.

This role sits within Financial Control, reporting directly to the Financial Controller.
Does this sound like you?

 As Accounts Assistant, you'll keep the engine running. You'll be the first point of contact for finance queries, own the purchase ledger end-to-end, support month-end close, and help manage corporate cash movements and reconciliations. Process matters here — and so does the judgement to know when to escalate.

You'll work closely with the Financial Controller and Head of Finance, contributing to audits, payroll processing, and identifying where things can be done better.

What you’ll do:

Accounts payable and receivable

• Process supplier invoices accurately and on time, ensuring correct coding and authorisation

• Raise sales invoices and manage the collection of outstanding debts

• Monitor aged debtors and creditors, escalating where appropriate

• Process and reimburse employee expense claims in line with company policy and HMRC guidelines

Bank and cashflow

• Perform daily bank reconciliations across multiple accounts

• Post cash receipts and payments to the ledger

• Assist with cashflow monitoring and reporting

Month-end and reporting

• Support the month-end close process, including journal postings and accruals

• Assist with the preparation of management accounts and financial reports

• Maintain fixed asset registers and process depreciation entries

• Produce ONS reports

General finance administration

• Maintain accurate, up-to-date financial records and filing systems

• Respond to internal and external finance queries professionally and promptly

• Assist with year-end audit preparation and provide supporting documentation

• Identify opportunities for process improvement across the finance function

What you’ll bring:

Must haves:

• At least one to two years' experience in an accounts or finance role

• Solid grounding in double-entry bookkeeping and core accounting principles

• Confident in Excel — VLOOKUPs, pivot tables, and standard formulas

• Experience with accounting software such as Workday, Xero, QuickBooks or similar

• Strong numerical accuracy and exceptional attention to detail

• Clear, organised, and able to manage a varied workload without losing pace

Nice to haves:

• Previous experience in a similar industry or finance shared services environment

• AAT Level 2 or above, or part-qualified ACCA or ACA

• Familiarity with cloud-based accounting platforms

• An interest in learning SQL for data querying and financial reporting
  

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

• 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.

• 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.