Custom ecommerce website development
in Redwood City

Sooner or later a shop outgrows the platform it started on. The plugins pile up, the checkout cannot be changed, or the monthly fees stop making sense. Rebuilding the storefront is the visible part of the move. The harder part is everything the old system remembers.

Start with an inventory of data, before any design work. Products with their variants and images. Customer accounts, including the ones nobody has used in a long time. Past orders, open orders, refunds, gift card balances, saved addresses, reviews. Each of these needs a decision: move it, archive it, or let it go. Writing those decisions down early saves weeks of argument near the end.

Customer passwords deserve their own conversation. Most platforms store them as hashes in a format the new system cannot read. There are two honest options. Either the new platform supports the old hashing method and upgrades each password at the next login, or every customer receives a reset email on launch day. The second option is simpler to build and costs some returning buyers, who simply ignore the email.

Order history matters more than it looks. Customers log in to reorder, to find an invoice, to start a return on something bought last month. Support staff need the same records to answer questions. If old orders stay behind in an export file, the first week after launch turns into a queue of tickets that nobody can resolve quickly.

Then come the addresses of the pages themselves. Product and category URLs usually change between platforms, because each system has its own pattern. Every old address that earned links or search traffic needs a permanent redirect to its closest new equivalent. A spreadsheet of old and new URLs, checked line by line, is dull work. It is also the thing that protects organic revenue after the switch.

Rehearse the move more than once. A good plan runs the full import into a staging copy, compares totals with the old shop, and fixes what did not match. Product counts. Customer counts. The sum of order values for a given month. Differences show up as missing variants, broken characters in names, or tax fields that landed in the wrong column. Two or three rehearsals are normal.

The final cutover needs a short freeze. For a few hours, the old shop stops taking orders, a last delta of new orders and accounts is copied across, and the domain is pointed at the new platform. Choose a quiet evening for it. Tell customer service in advance, and keep the old admin available in read only mode for a few weeks, in case a record turns out to be missing.

Integrations are the last trap. The payment gateway, the shipping tool, the accounting export, the email platform and the marketplace feeds all talked to the old shop. Each connection has to be rebuilt and tested with a real order, end to end. A new storefront that looks perfect but never sends orders to the warehouse is a failed launch.

Plan the first month after the switch as part of the project. Watch the redirect report for addresses that return errors, and add the ones that were missed. Compare daily revenue and conversion with the same weeks before the move. Read every support ticket that mentions a login, an old order or a missing product. Most migration problems surface in that window, and they are cheap to fix while the old data is still at hand.

Every shop has a few days that decide the quarter. A seasonal sale, a product drop, a mention on television. Traffic arrives all at once, and the site either holds or it does not. Preparing for that moment is a separate piece of work, and it starts weeks before the date.

The first step is knowing what the shop can take today. A load test sends simulated shoppers through the real paths: landing on a category, filtering, opening products, adding to cart, paying. It shows where response times start to climb. Often the weak point is a single slow database query, a heavy search, or an external service called on every page.

Caching carries most of the load on a sale day. Category pages, product pages and images can be served from a cache or a content delivery network for almost every visitor. The cart and checkout cannot. They are personal, they change with each click, and they hit the database. That is why the preparation focuses on those few pages rather than on the homepage.

Stock is the next risk. When hundreds of people try to buy the last units at once, a shop that only checks stock at the final step oversells. Some shops reserve an item for a few minutes when it enters the cart. Others check again right before payment and show a clear message if the item has gone. Either approach works if it is tested under load, with real concurrency.

Discount logic tends to break at the worst time. A sale often stacks a sitewide code, a free shipping threshold and a bundle offer. Test every combination the marketing plan allows, and a few it does not. Then decide which ones the system must refuse.

Third parties can fail too. The payment provider, the tax calculator, the address checker and the review widget all sit on the order path. For each one, the team should know what happens if it slows down or stops answering. A review widget can simply disappear. A payment provider cannot, so a second one configured in advance is worth considering for large events.

Freeze changes before the event. No new plugins, no theme edits, no pricing imports in the last few days. Agree who is on call, who can pause a campaign, and who can switch the shop into a queue or waiting room if traffic goes beyond what was tested. A waiting room page is better than an error page.

After the sale, look at the numbers while they are fresh. Response times, failed payments, oversold items, support tickets. Write down what nearly broke. That list becomes the plan for next season.

Communication with shoppers is part of the preparation as well. If a sale starts at a set hour, say so on the site and in the email, and make sure the prices really change at that minute. Scheduled price changes should be tested on a copy of the shop first. Nothing annoys early visitors more than a countdown that ends on old prices.

Fulfilment has a ceiling too. The website may accept thousands of orders in an evening. The warehouse may pack a few hundred a day. Agree the dispatch message in advance. Update the delivery estimate shown at checkout. Customers accept a longer wait they were told about.