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The Challenge:
Growing
Profitably
Scale-ups past Series A tend to share a familiar pattern. The team is talented, the budget is growing, the campaigns are running.
Yet something does not add up.
Attribution data that fails to reconcile with finance reports. ROAS figures that look healthy on paper, until mapped against contribution margin. A marketing function executing at pace, with no shared framework connecting spend to commercial outcome.
The result? Growth that is faster to fund than it is to sustain.
Not a simple CMO.
Not a growth consultant.
An Architect.
Most scale-ups have tried fractional marketing leadership. What they rarely get is someone who builds the infrastructure first: the measurement systems, the economic models, the structural frameworks, before optimising spend.
Revenue Function Architecture is the discipline of designing and building the operating foundations of a company's revenue engine. It works at three levels.
1. Measure:
Multi-touchpoint, attribution models built from first principles. No black-box tools. No platform-reported figures the CFO cannot audit. Clean, defensible data that connects marketing activity directly to revenue outcomes tailored to your business.
2. Optimise:
Map ROAS to contribution margin. Model LTV:CAC across your full acquisition mix. Build the investor-grade metrics framework your next fundraise will require. Improve the profitability of existing spend before adding more of it.
3. Structure:
OKRs, team architecture, reporting cadence, and cross-functional governance designed so that growth becomes repeatable without depending on one person to hold it together. The operating model your scale-up has been missing.
Florent.
Fractional Chief Growth Officer, Revenue function architect,
and founder of Leftorn
Over the past decade, I have led growth and marketing functions across B2B and D2C scale-ups, from Series A start-ups to 400-person organisations, managing marketing, operations, commercial, and product teams.
What distinguishes my work is not channel experience alone. It is the ability to build what sits beneath the channels: in-house attribution models designed from first principles, unit economics frameworks tied directly to P&L, and revenue operating models that make growth repeatable without me in the room.
I have delivered this in HealthTech, hospitality, events, housing, and e-commerce, in France, Germany, the United States, and the United Kingdom.
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Revenue: +1,000% YoY (2016) · +300% YoY (2017)
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CAC: -60% · ROAS: 40% → 140%
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Conversion rate: +440%
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6th fastest-growing tech company in the UK (Sunday Times Tech Track 2017)
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21th fastest-growing tech company in the UK (Sunday Times Tech Track 2018)
How it works:
Diagnose.
A structured audit of your current revenue function: measurement quality, attribution logic, unit economics, team structure, and OKR alignment.
No assumptions. No recycled slide decks. A precise picture of where your revenue infrastructure stands today and where the structural gaps are costing you most.
Design.
A clear architecture for your revenue function: what to build, what to fix, and in what order. Prioritised by commercial impact and execution feasibility.
The blueprint your team can act on immediately, with full accountability baked in from the start.
Deploy.
Hands-on implementation alongside your team. Attribution models built. Unit economics frameworks embedded. OKRs defined, aligned, and operational. Progress tracked against agreed milestones at every stage.
Not handed over and forgotten. Built to run without me when the engagement ends.
Ready to build your revenue engine ?
Start with a free 30-minute diagnosis call. No pitch. No generic slide deck. Just an honest conversation about where your revenue infrastructure stands today, and what it needs to become.
Available for part-time fractional mandates and interim full-time engagements. B2B and D2C · Remote and on-site across Europe.
