Flagstone Group LTD - Senior Commercial Finance Manager - 12 month FTC

• Own and maintain the revenue forecast, building and evolving cohort models that capture customer acquisition, retention and lifetime value dynamics • Partner with Sales and Marketing to understand funnel performance, interrogate conversion metrics, and translate commercial activity into financial outcomes • Build and scrutinise business cases and ROI calculations for proposed investments, ensuring the product backlog reflects the highest-value bets for the business • Partner with the Growth tribe — challenging assumptions, shaping prioritisation decisions, and ensuring capital is being deployed where it will have the most impact • Provide regular top-line reporting and variance analysis to senior stakeholders, with clear narrative on performance drivers • Support the FP&A planning cycle with timely, accurate and insight-led inputs on revenue and growth • What you'll bring • What you'll bring • We're looking for someone who combines strong technical modelling skills with genuine commercial curiosity. You don't just build the model — you understand what it's telling you and you know how to land that message with a non-finance audience. • Experience building revenue and cohort models, with a track record of owning top-line forecasting in a growth-oriented business • Ability to build compelling, rigorous business cases and ROI analyses to support capital allocation decisions • Prior experience partnering with Sales and Marketing functions, with familiarity of marketing funnel metrics and conversion analysis • Strong communication and influencing skills — comfortable engaging with senior stakeholders and cross-functional teams • SQL skills and comfort working in data-heavy environments • 5+ years of relevant experience in Commercial Finance, FP&A or Strategy • Experience with FP&A planning tools such as Anaplan or Pigment • Background in fintech, SaaS or other subscription/recurring revenue businesses • How we reward you: • 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. • Around the World scheme - 3 months work from anywhere scheme • 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 • 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.