If your Shopify store gets traffic but not enough sales, the problem usually isn’t marketing — it’s the storefront itself. Slow load times, clunky checkout flows, poor mobile UX, and theme bloat quietly bleed revenue every day. By Design UK builds and rebuilds Shopify stores across the UK with conversion at the core, using fixed-price contracts and AI-accelerated development to deliver results faster than a typical agency and more reliably than a freelancer.
Shopify conversion optimisation is the process of restructuring your store’s theme, checkout, and technical performance so a higher percentage of visitors actually complete a purchase. This can mean a full custom theme rebuild, targeted UX and speed fixes, or ongoing testing and iteration. Our Shopify development services cover all three, tailored to where your store currently sits.
Shopify builds and optimisation projects with By Design UK typically range from £499 to £18,999, depending on scope. A focused speed and checkout audit with targeted fixes sits at the lower end, while a full custom theme rebuild with bespoke conversion features, third-party integrations, and structured A/B testing sits toward the higher end. Every project is fixed-price and scoped upfront, so there are no open-ended hourly invoices creeping over budget. If your growth ambitions extend beyond Shopify into a fully custom platform, our SaaS development service covers bespoke builds from £18,000 up to £650,000+ for complex, enterprise-grade platforms.
Freelancers are often cheap and fast to start but risky to depend on — availability disappears, code quality varies, and you rarely get proper documentation or full ownership of what’s built. Traditional agencies solve the reliability problem but introduce new ones: slow project timelines, opaque day-rate pricing that balloons mid-project, and layers of account management between you and the developer actually writing your code. By Design UK sits deliberately between the two. You get a fixed price agreed before work starts, direct access to the people building your store, full source code ownership on delivery, and AI-accelerated development workflows that compress timelines without cutting corners.
We don’t just optimise other people’s stores — we design, build, and run our own live software. Tackly.co.uk is a multi-toolkit SaaS platform built entirely by our team, currently live and serving real users. It’s a working demonstration of the same engineering standards, performance discipline, and UX thinking we bring to every Shopify project. We’re a UK-based team, every engagement is fixed-price and contracted upfront, and you own 100% of the source code we deliver — no vendor lock-in, no ongoing dependency on us unless you choose it.
Conversion optimisation isn’t a one-off task — shopper behaviour, Shopify’s platform, and your product catalogue all change over time. Our support plans start from £299/mo for Shopify stores, covering monitoring, incremental improvements, app and theme updates, and priority bug fixes. For SaaS platforms built through our development service, support plans start from £797/mo given the added infrastructure complexity. Both are designed to keep your platform fast, secure, and improving after the initial build ships.
Most engagements begin with a short discovery call to review your current store, identify the highest-impact conversion issues, and scope a fixed price before any work begins. There’s no obligation and no generic sales pitch — just a straight assessment from the developers who’d actually build it. You can learn more about how we work on our about page, or reach out directly via our contact page to arrange a review.
Smaller optimisation projects typically take 2-4 weeks, while full custom theme rebuilds with integrations and testing can run 6-10 weeks. Timelines are agreed upfront as part of the fixed-price scope.
Yes. Full source code ownership is transferred to you on completion of every project, with no licensing fees or ongoing dependency on By Design UK unless you opt into a support plan.
In many cases, yes. We assess whether targeted performance and UX fixes to your existing theme will deliver sufficient uplift, or whether a rebuild offers better long-term value, and price accordingly.
Yes, we’re a UK-based team operating from our Enfield office, and all client communication, contracting, and development happens within the UK.
Image via Pixabay
Tell us what you need — we'll come back with a quote within 24 hours.
Thank you for your enquiry. We'll review your requirements and come back to you with a proposal within 24 hours.
Leave your details and we'll call you back at a time that suits you.
We've received your request and will call you back at your preferred time. If it's urgent, email us at info@bydesignuk.co.uk