Web Development Agency for London
UK Businesses, Indian Engineering Excellence
London businesses get Silicon Valley-grade development at 40–60% below UK agency rates. We've delivered Shopify stores, SaaS platforms, and fintech products for London companies — with GMT overlap hours, GBP pricing, and full GDPR compliance.
What We Build for London Clients
From MVPs to enterprise platforms — the full stack of digital products London businesses need.
Custom Website Development
Next.js, React, or WordPress — fast, SEO-optimised, and built to convert visitors into leads.
Shopify & Ecommerce
Custom Shopify themes, Shopify Plus builds, and WooCommerce stores — engineered to sell.
Mobile App Development
React Native and Flutter apps for iOS and Android — one codebase, two stores, full native performance.
UI/UX Design
Figma-first design with real user research — interfaces that users love and businesses measure.
WordPress Development
Custom themes, Gutenberg blocks, and WooCommerce — no page builders, no bloat.
PWA Development
Installable progressive web apps with offline mode, push notifications, and app-store-free distribution.
Why London Businesses Choose Sigill
Local market understanding. Global engineering standards. Delivered on time.
GMT Overlap Hours
We maintain GMT afternoon overlap: 2 PM–6 PM GMT daily for standups and calls. Real-time collaboration without full-day async.
Full GDPR Compliance
Cookie consent (ICO-compliant), data subject request flows, DPA agreement, privacy-by-design architecture. GDPR built in, not bolted on.
Open Banking & FCA-Awareness
Experience with Plaid, TrueLayer, and Open Banking API integrations for London's world-leading fintech sector.
GBP Pricing & UK Contracts
GBP milestone billing, UK-style MSA and SOW, and VAT invoicing available. No currency risk, no hidden fees.
Industries We Serve in London
Deep domain knowledge across London's most active sectors.
What London Clients Say
"London fintech. Sigill built our Open Banking dashboard in 9 weeks. GDPR-compliant, FCA-aware, and our users love it."
"Mayfair fashion brand. Shopify Plus store with AR try-on and personalised recommendations. CVR jumped from 2.1% to 5.3%."
"PropTech startup. Land Registry integration, AML checks, and a slick buyer journey. Delivered under budget."
FAQs — London
Yes — fintech, fashion, proptech, healthtech, and SaaS across London, Manchester, Birmingham, and the wider UK.
Yes — full GDPR implementation: ICO-compliant cookie consent, DSR flows, DPA agreement, data minimisation, and privacy-by-design architecture.
2 PM–6 PM GMT daily for standups and calls. Slack async throughout the UK business day.
Yes — TrueLayer, Plaid, and direct Open Banking API integrations for UK fintech and PFM products.
Yes — KYC/AML flows with Onfido or Jumio integration, sanction list screening, and PEP checks for UK regulated businesses.
Yes — GBP milestone billing with VAT invoicing available. UK-style MSA and SOW on request.
Yes — UK GDPR, ICO cookie rules, DSR, and Consumer Rights Act-compliant returns flows for UK ecommerce builds.
Yes — NHS login integration (via NHS Identity), FHIR-aware data handling, and IG Toolkit-conscious architecture.
Ready to Build Your London Project?
Tell us what you're building. We'll send a detailed quote within 24 hours — no sales calls, no pressure.