What we do

Everything you need to ship a great product.

Web and mobile app development for London & UK businesses — from your first landing page to a full web app or iPhone app. Design, build and technical care, all in one studio.

Websites

Stunning, fast websites that build trust and turn visitors into customers.

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iPhone apps

iPhone app development with React Native — fast, native-feel iOS apps we design, build and ship to the App Store.

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Online shops

Smooth, secure stores your customers love to buy from, on any device.

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UI/UX design

Considered, beautiful interfaces — handed off clean, straight to engineering.

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Speed & fixes

Slow or dated site? We rebuild it fast, modern and ready to convert again.

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Start a project

Tell us your idea and we'll send a clear plan within a day.

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~ $ next build
▲ compiling…
✓ compiled in 4.2s — 0 errors
~ $ lighthouse --score
LCP 0.9s ✓CLS 0.00 ✓INP 42ms ✓100 / 100
01 — Speed

Engineered for speed.

Every build ships in green Core Web Vitals — under a second to load. Visitors stay, and Google rewards you with higher rankings.

02 — Design

Designed for people.

Clean, considered interfaces that feel obvious to use. Beautiful on every screen, from a phone in the rain to a 6K display.

03 — Scale

Built to scale.

Type-safe code on the modern JavaScript stack — ready to grow from your first launch to your millionth visitor, with no rebuilds.

Speed you can feel.

The numbers behind every site we ship.

100
Lighthouse score
<1s
Load time
600+
Projects shipped
98%
Happy clients
FAQ

Frequently asked questions.

How much does a website cost?

Every project is priced individually, because a one-page landing site and a full web app are very different jobs. Tell us what you need and we'll send a clear, itemised quote — no hidden extras. Most small business sites start in the low thousands; larger apps and online shops scale from there.

How long does it take to build a website?

A focused marketing site typically takes 2–4 weeks from kick-off to launch; online shops and web apps usually run 6–12 weeks depending on scope. We agree a fixed timeline up front and keep you updated at every milestone so there are no surprises.

Do you build iPhone apps as well as websites?

Yes. We build iPhone (iOS) apps with React Native — fast, native-feel apps that we design, build and ship to the App Store for you. We also build progressive web apps when that's the better fit for your project.

What technologies do you use?

We build on the modern JavaScript stack — React, Next.js and TypeScript on the front end, Node.js, NestJS, GraphQL, PostgreSQL and Prisma on the back end, deployed on Vercel and AWS. We also integrate AI features such as smart search, chatbots and RAG pipelines when they add real value.

Will my website rank well on Google?

We engineer for search from day one: clean semantic markup, fast sub-second load times, green Core Web Vitals, structured data and a sitemap. Technical SEO gets you a strong foundation — paired with good content, that's what wins rankings. We can advise on content and keywords too.

Do you work with clients outside London?

We're based in Sidcup, Bexley and serve businesses across London and the whole of the UK. Most of our work happens remotely with regular calls, so location is rarely a barrier — we work with clients wherever they are.

Can you redesign or speed up my existing website?

Absolutely. If your current site is slow, dated or hard to update, we can rebuild it on a fast, modern stack — keeping what works, fixing what doesn't, and getting you back into green Core Web Vitals so visitors stay and Google rewards you.

Do you offer ongoing support and maintenance?

Yes. After launch we offer support and maintenance plans covering updates, monitoring, security and small changes, so your site stays fast, secure and current. We're a long-term partner, not a build-and-disappear agency.

Let's build
something fast.

Tell us your idea and we'll come back with a clear plan and an honest price — usually within a day.

Email us
info@brain-code.co.uk
Find us
Sidcup, Bexley · London, UK
Response time
Usually within a day
Free quote·No obligation·Senior engineers — no juniors·Clear fixed timeline