Accounts Assistant - 6 month FTC

Flagstone is an online savings platform, reinventing how individuals, businesses, and charities manage, protect, and grow their cash. Behind that mission is a diverse team of people bound by a collaborative spirit — and a business that's profitable, ambitious, and genuinely good at what it does.

What ties it all together is our culture. It's our competitive advantage, and we guard it carefully.

High performance needs more than talent. It needs an environment built on kindness, respect, and the freedom to grow. We're building a diverse, inclusive community where your voice carries weight, your development is taken seriously, and your contribution is recognised.

We may not change the world. But we're changing the world of savings — and we'd like you to be part of it.

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.

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

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 — at least one day a week in our London office
• Flexible benefits budget — spend it on what actually matters to you
• Salary sacrifice options: electric cars, nursery schemes, home and tech goods
• Mental wellbeing support via Spill
• £1,000 personal development budget
• Private healthcare with AXA, including reduced gym memberships
• Medical cash plan for dental and optical costs
• Life insurance and income protection — four times your annual salary
• Matched pension contributions up to 5%
• 25 days holiday, plus bank holidays, wellbeing days and volunteering days
• Enhanced maternity, paternity and adoption leave

At Flagstone, we're building a team that challenges what finance looks like. We encourage you to apply — whatever your background.