Ecommerce Growth Expert
An Ecommerce Growth Expert and Fractional CMO Who Scales the Whole System, Not One Channel
Growth is not a single channel you can buy your way into. It is the system: conversion, retention, paid efficiency, and clean data working together across your whole stack. I run that system as your fractional CMO, and I build the owned version of it inside your company so the growth compounds into equity instead of vendor invoices.
An ecommerce growth expert grows the whole business, not one channel. The high-value work is conversion rate optimization, a retention system in email and SMS, efficient paid acquisition, and analytics you can trust, all run as one engine. Hire a freelancer for a single task. Hire a fractional CMO who knows ecommerce when you want someone to own the revenue number, sequence the roadmap, and build the growth infrastructure your business keeps.
Growth is a system, not a channel
Most founders searching for an ecommerce growth expert are really looking for one thing to fix. More ads. A better email tool. A new theme. The instinct is understandable, because every vendor in the market sells a single channel and promises it is the missing piece. But a store that has plateaued rarely has one broken channel. It has a system that is out of balance, and pouring money into any one part of it just exposes the weakness in the next.
Think about what actually happens when revenue is stuck. Traffic arrives but the product pages do not convert, so acquisition burns budget on visitors who bounce. The email list exists but the flows were built once and never optimized, so retention leaks. The paid channel gets more expensive every quarter because it is carrying weight that conversion and retention should share. Each of these looks like its own problem, and each freelancer you hire will tell you their slice is the fix. It never is. The number moves when conversion, retention, paid efficiency, and clean data start working together.
The four levers that actually move the number
See if Mark can actually help your growth.
Check if you're a fit →Free, no obligation. If it's a fit, you'll pick a time to talk with Mark directly.When I take on an ecommerce store, the first two weeks are diagnostic. I do not start building until I can see where the money leaks. There are four levers, and the art is knowing which one to pull first for your specific store.
Conversion. This is the highest-leverage work in ecommerce because it multiplies everything downstream. A store that converts at two percent instead of one percent doubles the return on every ad dollar and every email click without spending a cent more on traffic. Product pages, cart, and checkout are where most stores quietly lose half their buyers, and it is almost always the last place a founder looks. On the storefront itself, whether you run Shopify or another platform, this is the work that compounds.
Retention. Acquiring a customer once and never speaking to them again is the most expensive way to run a store. A real retention system in email and SMS, built in Klaviyo and tuned to your buying cycle, raises lifetime value so that acquisition can afford to bid higher and still stay profitable. Retention is not a welcome flow and a monthly newsletter. It is a machine that turns a first order into a second, third, and fourth.
Paid efficiency. Once conversion and retention are pulling their weight, paid acquisition stops being a money pit and becomes a lever you can scale. The goal is not more spend, it is more efficient spend: campaigns that reach buyers the store can convert and the flows can retain, measured against real contribution margin rather than platform-reported return.
Clean data. None of the above is trustworthy without analytics that tell the truth. Most stores run on numbers that are quietly wrong, which means budget moves on hunches. Clean, attributed data is what lets you invest in the lever with the highest return instead of guessing, and it is usually the least glamorous fix that unlocks all the others.
One engine, across the whole stack
Your revenue does not live in a single tool. It lives across the storefront, retention in Klaviyo, marketplace sales on Amazon FBA, paid acquisition on Meta and Google, and the analytics that ties them together. When five different freelancers each own a slice, every one of them optimizes locally and nobody owns the whole. Acquisition buys traffic the store cannot convert. Email discounts buyers who would have paid full price. Amazon and the direct store compete instead of compounding. The result is spend that looks busy and a revenue line that stays flat.
A fractional CMO runs the stack as one engine. Conversion work on the store lifts the return on every ad dollar and every marketplace visit. Retention flows raise lifetime value so acquisition can afford to scale. Clean analytics tells the truth about what is working so budget moves to it. The channels stop fighting each other and start reinforcing each other. That is the difference between an ecommerce expert who ships tasks and a growth leader who owns the number.
Build it in-house, so growth becomes equity
Here is the part most agencies will not tell you. When an agency runs your ecommerce growth, you are renting their process and their tools, and they keep the intellectual property. Every month you pay an invoice that leaves nothing behind. The day you stop paying, the capability walks out the door with them, and you are back where you started with a more expensive habit.
I work the other way. I run the growth now, and I build the owned version of every system inside your company alongside your team: your conversion framework, your retention automations, your reporting, and the custom tooling that a generic app cannot do. To keep costs down and control up, we build these in-house rather than stacking third party subscriptions that own your data. The systems, the data, and the automations become assets on your side of the table. An agency invoice is a cost. An owned build is an asset that raises the equity and internal value of the business. When you eventually sell, raise, or hand off, you are handing off owned infrastructure, not a vendor relationship. For stores ready for it, that owned layer becomes a real software build you fully control.
An agency invoice is a cost. An in-house build is an asset that raises the value of your business. A fractional CMO who does both gets you the growth today and the equity tomorrow.
The platforms I run, working as one
Growth crosses platforms, so the strategy has to as well. Shopify is the storefront and the conversion surface. Klaviyo carries retention in email and SMS. Amazon FBA is a second revenue engine that most direct-to-consumer brands either ignore or run in a silo. Meta, Google, and increasingly TikTok carry acquisition. I work across all of them, which means the plan is coherent instead of stitched together from vendors who never talk to each other. If you already run some of these, we tune them. If you are missing pieces, I build the right ones in the right order rather than bolting on tools you will abandon in a quarter.
The tools and platforms I trust for ecommerce, along with the ones I use to build owned infrastructure, are on my resources page. If you want to see the stack before we talk, start there.
See the tools and platforms I use
Freelancer, agency, or fractional CMO
Use an ecommerce freelancer when you have a defined task and you know it is the right one: a theme fix, a single flow, a one-time migration. Expect $50 to $150 per hour and a clean handoff. Use an agency when you want to fully outsource execution and you are comfortable that they keep the process and the IP. Expect a retainer and a slow path to owning anything.
Use a fractional CMO when the problem is that revenue is stuck and you need someone to own the outcome, not just the output. You get senior strategy, a sequenced roadmap, and execution across the whole stack, at $5,000 to $40,000 per month instead of the $200,000-plus a full-time CMO costs loaded. And you get the in-house build, so the work compounds into your business rather than into a vendor invoice you can never resell.
How we start
It begins with a short intake so I understand your store, your revenue, and where you are actually stuck. From there I run the diagnostic, show you the two or three levers that move your number the most, and we agree on scope. You see results inside the first 30 days because we start with the highest-return work, not a six month strategy deck. No phone tag and no pressure. Tell me about your store and I will tell you honestly whether I can help.
Ecommerce growth expert FAQ
What does an ecommerce growth expert do?
An ecommerce growth expert grows the whole business, not one channel. That is conversion rate optimization on product and cart pages, a retention system in email and SMS, efficient paid acquisition, and clean data you can trust, all working as one engine. A fractional CMO who knows ecommerce decides which of those levers to pull first based on where your revenue is leaking, then owns the roadmap that moves the number.
How much does an ecommerce growth expert cost?
Task-based freelancers run $50 to $150 per hour. A fractional CMO who owns ecommerce growth strategy runs $5,000 to $40,000 per month depending on revenue and scope, against the $200,000-plus a full-time CMO costs loaded. The freelancer ships a task. The fractional CMO owns the revenue number and the roadmap that gets you there.
Should I hire an ecommerce agency or build the systems in-house?
An agency invoice is a cost that leaves nothing behind. Building the systems in-house makes them an owned asset that raises the equity and internal value of the business, because the conversion frameworks, retention automations, and reporting live inside your company. The pragmatic path is a fractional CMO who runs it now and builds the owned version alongside your team, convertible later to a real software build you control.
Can one growth expert handle Shopify, Klaviyo, ads, and Amazon together?
Yes, and that is the point. Growth is not one channel, it is the system. Your storefront on Shopify, retention in Klaviyo, marketplace revenue on Amazon FBA, and paid acquisition all feed one revenue line. A fractional CMO treats the whole stack as one system so conversion, retention, and acquisition reinforce each other instead of being optimized in silos by separate vendors who never talk.