Codexlava customises WordPress and Shopify, and builds custom websites in Flask and Next.js — Python and JavaScript, the two languages we work in every day.
Because we build on all four, we can recommend the one your business actually needs. Then we build it to load fast, read well to Google and AI assistants, and look right when someone shares it.
This site runs on Flask · Lighthouse mobile 98
Customise a platform when it already does most of the job. Build custom when it does not. Either way the site is fast, findable and yours.
Custom themes and block patterns built around your brand, plugins chosen and configured rather than piled up, and the speed work most WordPress sites never get — in an editor your team already knows.
Theme changes your team can edit section by section, product data that holds up, and the apps and systems the store needs to talk to.
Sites that do more than publish: portals, bookings, calculators and pages drawn from your own data. This website is built on Flask.
React sites rendered on the server, so pages arrive as real HTML — quick for visitors and readable by search engines and AI assistants — then behave like an app once they load.
Find the line that sounds most like you. If two do, that is a conversation worth having before anything is built.
News, guides, case studies and landing pages, edited by people who are not developers. WordPress has the editor most of them already know.
Catalogue, checkout, payments, stock and shipping in one hosted platform, so your effort goes into the shop rather than the server.
Bookings, quotes, customer portals or pages built from your own Python systems and data. Logic first, pages second.
A fast marketing site that also behaves like an app, or a React front end that may grow into a product.
A template builder may honestly be the cheaper answer. If it is, we will say so on the first call.
WordPress and Shopify between them run close to half of all websites, and more than a quarter of UK retail spending now happens online. The difference between two sites on the same platform is the work done on top of it.
Sources: W3Techs (1 October 2026); ONS, internet sales as a percentage of total retail sales (released 18 September 2026); Directive (EU) 2019/882. Market context, not Codexlava results.
Most rankings lost in a redesign are lost to missing redirects, not to the new design. Moving WordPress to Shopify, or either to Next.js, follows the same five steps.
Every URL, which ones rank, which ones earn links and which ones bring enquiries. That list is what the redesign must not break.
Every old URL mapped to its new equivalent with a permanent 301 redirect, agreed with you before launch rather than discovered after it.
The content, titles and internal links that ranked carry over or improve. A new look is not a reason to throw away what Google already trusts.
Redirects, canonicals, sitemap, structured data, share cards and speed checked on the staging URL before the switch.
Errors, missed redirects and indexing reported and fixed in the weeks after launch, while they are still cheap to fix.
Buyers now find a business in three places: a search result, an AI answer and a link a colleague shared. Every site we ship is ready for all three on launch day. For the ongoing work, see SEO & AI visibility.
The same mainstream tools as the rest of our stack, so a website can grow into an application without changing team or language.
Customised rather than started from scratch, when a mature platform already does most of the job.
Flask for lean sites with logic, Django when a site needs accounts and an admin, FastAPI for the APIs behind them.
Next.js and React for fast, interactive front ends, with TypeScript where a codebase will grow.
Where content, orders and customer records live, with Redis caching what does not need recalculating on every visit.
Payments, leads into the CRM, staff sign-in and invoices, through systems you already use.
Sized for the traffic, containerised, and deployed through a pipeline rather than by hand.
Key journeys clicked through by Playwright before release, and errors reported from real visitors after it.
If you are in the second column, we will say so on the first call rather than sell you something you do not need.
You approve each stage before the next one starts, and you own everything you paid for.
Which of WordPress, Shopify, Flask or Next.js fits, which pages the site needs and what it connects to. You approve it before design starts.
Wireframes, then a clickable prototype, before any production code is written.
Built in increments you can review, with an editor your team will actually use.
Core Web Vitals, canonicals, sitemaps, structured data, llms.txt, share cards and analytics events.
So your team can edit content and another developer can maintain the code.
Shopify or WordPress for a UK shop: monthly costs, sales fees, hosting, flexibility and upkeep compared, and which kind of business each suits.
Next.js or WordPress for a business website: who edits it, speed, features, maintenance and security compared, plus the headless middle option.
Shopify's UK plan prices and card fees, what a store build costs with a freelancer or agency, and the app costs that add up every month.
Send us the address of your current site. We will tell you on the first call what we would keep, what we would change and which platform we would use.
One call, no obligation. We will tell you what the work involves, roughly what it costs, and whether we are the right people to do it.