Marius Kerkvliet — Shopify and Next.js developer in Leiden, Netherlands

About Marius

Shopify & Next.js developer — Leiden, Netherlands

I'm a full-stack developer based in Leiden, Netherlands. I build e-commerce stores and custom web applications for brands that need more than a template. Every project is built by me personally — no outsourcing, no junior devs, no handoffs. That means faster delivery, direct communication, and someone who actually cares about the result.

I work with clients across Europe, the UK, the US, and beyond. Most projects start within three days of the first call and ship in under two weeks.

What I do

My day-to-day work falls into three buckets:

I don't do WordPress, I don't do hourly billing, and I don't take on projects I can't ship myself. The stack stays modern (Shopify Liquid, Next.js, Supabase, Tailwind) and the scope stays honest.

Recent work

The most public project is MurmReps — a multi-currency Next.js storefront managing 15,000+ products with Klaviyo, Meta Pixel, and GA4 integration. Built end-to-end on Next.js and Supabase. Most other client work is under NDA, but the homepage project section covers what I can share.

Why fixed pricing

I don't bill by the hour. Hourly billing creates the wrong incentives for everyone — the developer is rewarded for being slow, and the client never knows what the final number will be. Every project I take on is quoted as a fixed price up front, with a clear scope and a clear deliverable. If something takes me longer than expected, that's my problem, not the client's. Full pricing is on the pricing page.

Quick facts

Name
Marius Kerkvliet
Location
Leiden, Netherlands
Business
murmweb.dev
KVK
99702738 (Dutch Chamber of Commerce)
Email
hello@murmweb.dev
Phone
+31 6 5562 9684
Languages
English, Dutch
Stack
Shopify Liquid, Next.js, Supabase, TypeScript, React, Tailwind CSS

Have a Shopify or Next.js project in mind?

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