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From Shopify to Custom: What Actually Happens During an Ecommerce Migration

LC

Lewis Cowan

The Bee Seen Company

7 min readMarch 2026
From Shopify to Custom: What Actually Happens During an Ecommerce Migration

From Shopify to Custom: What Actually Happens During an Ecommerce Migration

So, you've been eyeing up a shiny, fully custom ecommerce site. Maybe the template on Shopify or WooCommerce feels like a pair of jeans that've grown too tight (thanks, holiday dinners). Or maybe your business has simply outgrown the limits of your current platform. You're ready to scale, flex, and craft something that feels uniquely you.

But then comes the slight panic: what actually happens during a migration? Does your customer data vanish into the void? Will all those lovely Google rankings crumble away like a dry biscuit? Will your products make it to the other side unscathed?

Stick with me, and I'll walk you through the ins and outs of this daunting-sounding process. Spoiler: it's less scary than it seems, as long as you know what you're doing (or hire someone who does).


Why Businesses Migrate to a Custom Ecommerce Platform

First, a wee note on why you might be considering this move. Custom platforms aren't for every business - but if you're finding your platform restrictive or lacklustre, it might be time to jump ship.

Here's why UK small businesses often migrate:

  • Scalability: You're handling more products or traffic than Shopify/WooCommerce can sensibly support. A custom build lets you grow at your own pace without worrying about platform constraints.
  • Flexibility: You want features or functionality that simply don't exist on your current system. Maybe you need complex filters, bespoke integrations, or AI personalisation.
  • Branding & Design Freedom: You're sick of looking like every other Shopify store. A custom site lets you fully own your brand’s look and feel, with no templates holding you back.
  • Performance: A faster, smoother experience for customers - especially as mobile commerce now accounts for a whopping 70%+ of UK online transactions.
  • SEO Fine-Tuning: A better site structure can do wonders for your rankings. Plus, custom platforms let you build URLs and metadata the right way, not the ""generated mess"" way.
  • If you're thinking, ""That sounds like me,"" you're in good company. Even ecommerce giants like Gymshark and ASOS have taken the custom plunge.


    What Happens During the Migration

    Moving an ecommerce site is a bit like moving house. You're packing up your products (furniture), making sure customer data (family photos) arrives safely, re-routing your address (URLs), and giving the new place a nice makeover (design). Here's how it all goes down:

    1. Product Migration: From Platform to New Database

    The first step in any migration is getting everything from your current platform into a new, custom database (think of this as your new house's foundation). Products, categories, and SKUs all need to be packed up neatly and transferred.

    This is done through tools or scripts like API integrations or good old CSV exports. Imagine exporting your product catalog, cleaning it up (checking for duplicates or errors), and importing it into your shiny new system.

    #### Key Tip:

    Double-check your product data during migration. Nothing's more annoying than discovering two months later that all your stock levels are wrong because a column got mangled.


    2. Orders & Customers: Keeping the Essentials

    Order history and customer data are critical. Losing this isn't just unprofessional, it's a potential GDPR nightmare. In the UK, businesses must retain order data for at least 7 years for compliance reasons.

    Here’s what happens:

  • Orders: These are typically duplicated from your old system to the new one, ensuring you can track historical purchases without compromising your brand's continuity.
  • Customers: Basic info like names, emails, and order histories should sync to your new database. Want to get fancy? You can also retain preferences, loyalty points, and even abandoned cart treasures.
  • Pro tip? Email your customers ahead of time to reassure them: ""Your account and order history are safe with us, just in case you were worried!""


    3. Preserving or Improving Your URLs

    This is where most migrations can fall flat on their face. If you don’t handle URLs properly, your lovely site could see its SEO rankings nosedive faster than a toddler on roller skates.

    Here’s what you need to do:

  • Use 301 redirects: These tell Google that your old URLs have moved permanently to new ones, transferring all that SEO goodness (rankings, links, and traffic).
  • Structure things properly: Say goodbye to ugly, autogenerated URLs like `/product?id=123`. Move to nice, SEO-friendly ones like `/hand-knitted-scarves`.
  • The goal isn't just to preserve the past; it's also to set yourself up for future success.


    4. Rebuilding the Design Without Constraints

    Now comes the fun bit. With a custom platform, you're not stuck trying to shoehorn your dreams into someone else's rigid template. You can create a mobile-first, completely intuitive design tailored to your customers' needs.

    Expect better layouts, smoother navigation, and a faster experience - perfect for turning those 70% mobile shoppers into loyal visitors. Plus, you can add all those personal touches you’ve been dying to include (custom filters, trending products, style quizzes, whatever you fancy).


    5. Testing and Going Live

    Before you set your eagle loose on the ecommerce world, you'll need to test the heck out of your new site. A few must-dos:

  • Load Testing: Can it handle Black Friday traffic without collapsing like a Jenga tower?
  • Conversion Testing: Does it outperform your old site? If not, what tweaks do you need?
  • Security Checks: Is it PCI DSS compliant for payments?
  • Once you're happy, you’ll run a ""blue-green deployment"" - your new site goes live while the old one stays online for a quick but dependable switchover.


    6. Post-Migration Monitoring

    The migration isn’t done until you’ve survived the first month. It's like new parents bringing a baby home: you’re thrilled, but you’re also on red alert for any issues.

    What to watch for:

  • SEO Rankings: Did your redirects work? Is traffic stable?
  • Conversion Rates: If they’ve dropped, why? It’s fixable, I promise.
  • Downtime: Keep it under 2%.
  • You’ll also want to track orders, ensure customers are happy, and adjust as needed. This phase is critical for ironing out kinks and optimising further.


    Common Mistakes to Avoid

    It’s worth mentioning a few avoidable blunders that can turn your migration into a nightmare:

  • Ignoring URL redirects: The quickest way to ruin your SEO and make Google very upset.
  • Skipping mobile optimisation: Remember, 70% of UK ecommerce is mobile - neglect it at your peril.
  • Rushing: A shoddy migration leads to lost data, decreased sales, and unnecessary stress. Take your time.
  • No communication: Customers absolutely hate surprises when it comes to their accounts or orders. Keep them informed.

  • Is a Custom Migration Worth It?

    For many UK businesses, absolutely. A custom platform offers scalability, creativity, and full control - essentials in a market where competition is fierce, and customer expectations are sky-high.

    Still, it’s an investment. Expect to spend anywhere between £10k and £50k, depending on the size and complexity of your store.


    Final Thoughts

    An ecommerce migration might feel like pulling your shop apart at the seams and putting it back together again. But with careful planning and a strong strategy, it’s a chance to level up your business and stand out in the crowded (and ever-growing) UK market.

    If you’re gearing up for a migration and don’t know where to start, give me a shout. At The Bee Seen Company, we love this kind of challenge - and we’ll make sure not a single customer, order, or product gets left behind in the process.

    Cheers,

    Lewis

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