Interim & freelance
Temporary leadership of your marketplace operation: strategy, execution and handover
I'm Hans van Leeuwen, an interim e-commerce manager based in Amersfoort, the Netherlands. I take temporary charge of your Amazon and Bol.com operation when your manager leaves, growth outpaces the team, or you open a new channel. At Alpine Hearing Protection I grew the earplug category on Amazon NL to a 70% market share (Nielsen, 2023) and brought out-of-stock below 2%; at ABS All Brake Systems I connected eBay, Amazon and Bol.com into a single operation. In total I have managed more than €2 million in marketplace revenue and teams of 6+ FTE.
Hans van Leeuwen
Freelance e-commerce & marketplace manager, Amersfoort (NL)
70%
market share in the earplug category on Amazon NL
Alpine Hearing Protection · Nielsen 2023
<2%
out-of-stock after introducing demand forecasting
Alpine Hearing Protection · 2021–2022
€2M+
marketplace revenue managed, budget responsibility €500K+
CV, roles 2017–2026
+40%
organic traffic through SEO optimisation of the catalogue
Intergamma (Karwei/Gamma) · 2017–2019
ABS All Brake Systems
E-commerce manager · 2025–present
Alpine Hearing Protection
Marketplace manager · 2021–2025
Intergamma (Karwei & Gamma)
E-commerce manager · 2017–2020
IGM Badkamerwinkel
E-commerce manager · 2019–2020
Webhelp (GGD GHOR)
Team coach · 2020–2022
Talpa · Edelman
Internships: online marketing · UX design · 2013–2015
References from clients and managers available on request. Recommendations on LinkedIn
What I ran into along the way, with numbers, is documented in my articles:
In my article on listings that don't convert I describe an outdoor brand with ~120 SKUs on Amazon DE and Bol.com spending €14,000 a month on Sponsored Products with a 23% return rate. Sizing infographics in the gallery, a comparison table and a scannable title lifted conversion from 8.1% to 12.7% and cut returns to 14%, after which ad spend could drop by €3,000 a month.
Read the case (Dutch)In my own automation stack roughly half of the success messages could not be traced to a real action. Since then every operation I lead runs on one rule: no green light without evidence.
Read why reporting needs proof (Dutch)Day rate, project price or monthly fee: the article explains which model fits which kind of work, what a day does and does not include (tooling and automations from earlier engagements yes; ad budget, marketplace fees and photography no) and when a permanent hire is the cheaper option.
Read how the rates are built up (Dutch)Week 1 is an operational baseline: channel profitability per marketplace, advertising efficiency, listing quality, stock risk, product data, who owns what and how reporting works. Urgent revenue and availability risks are separated from structural improvements and turned into a backlog with an owner and a measurable outcome for every action.
In weeks 2 and 3 I work inside the existing team and tool stack. That usually means restructuring Amazon Ads or Bol Ads, fixing catalogue and feed issues, introducing a weekly trading rhythm, clarifying P&L ownership and aligning agencies, logistics, finance and content. Decisions stay visible in a compact KPI dashboard and a written weekly update.
Week 4 is about handover, not dependency. Processes, access, decisions and recurring checks are documented for the permanent owner, with a 90-day roadmap and an honest recommendation on team capacity. That makes the engagement useful both as temporary leadership and as preparation for a permanent hire.
No agency margin, no six-month minimum, cancellable monthly. Three models, with indicative rates (excl. VAT):
After a 30-minute intro call you receive a written quote within one working day: scope, cadence and final rate. For context: a permanent e-commerce manager, including employer costs, quickly runs to €6,000 or more per month, without the option to stop monthly. An interim engagement of three days a week usually stays below that. All rates and what is included →
They temporarily lead the e-commerce or marketplace operation: strategy, daily execution on Amazon and Bol.com, advertising, product data, stock and reporting. Unlike a consultant, an interim manager owns the outcome and works inside the team, not next to it.
When your e-commerce lead leaves, when a growth phase outpaces the team, when expanding to a new marketplace such as Amazon DE, during a vendor-to-seller transition on Bol.com, or as cover while recruiting a permanent hire.
I work on a day rate, project fee or retainer. After a 30-minute intro call you receive a written quote within one working day. An interim engagement of three days a week is usually cheaper than a permanent manager including employer costs, and can be ended monthly.
Both. I'm based in Amersfoort and work on-site in the Utrecht region and remote for clients across the Netherlands and the EU, from two days a week to full coverage.
Usually within a few weeks, depending on current commitments. The first week is always a baseline, so priorities are fixed by week two.
Amazon Seller and Vendor Central (NL, DE and other EU marketplaces), Bol.com, eBay, Magento and WooCommerce, plus the layer underneath: Channable for feeds, n8n for automation, Helium10 and Nielsen for market data, GA4 and Power BI for reporting.
Book a 30-minute intro call. You receive a written quote within one working day. No obligation.
Book an intro callAmazon NL specialist · Bol.com consultant · AI e-commerce automation · Case studies