App Development Company for London Businesses
Senior India-based engineering for London fintechs, startups and enterprises — from about £16 an hour, with your whole morning as live overlap.
Get a free quoteYour app development partner in London
London has more app agencies than any city in Europe, and most bill £600 to £1,200 a day for work a senior offshore team does just as well. GTS Infosoft is that offshore team — an India-based studio, 16 years old, building fintech platforms, mobile apps and AI products for London companies from about £16 an hour. No local office, no local markup, no pretending otherwise.
The timezone is the part people underestimate. India runs four and a half to five and a half hours ahead of London, so your 9 am standup is our mid-afternoon and we're still at our desks well past your lunchtime. Your whole morning and early afternoon is live overlap — standups, code reviews, demo calls — and we'll stay later when a release needs it.
Sixteen years, 250-plus apps, 100-plus clients, ISO 9001:2015 — documented requirements, traceable testing, and a full IP handover your lawyers will actually like. Shoreditch founders use us to make a seed round last twice as long. Canary Wharf teams use us to clear backlogs their internal engineers can't reach. Same senior people, either way.
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ISO 9001:2015 Certified
ISO 9001:2015 CertifiedWorking with GTS from London
India is 4.5–5.5 hours ahead of the UK, so your morning overlaps our afternoon — a solid live window every working day.
| Your timezone | UK time · GMT+0 (+1 in summer) |
|---|---|
| Live overlap window | ≈ 9:00 AM–1:30 PM UK, every working day |
| Daily live overlap | ≈ 4–5 hours |
| Typical local build rate | GBP 60–120 / hr (local agencies) |
| GTS senior rate | from ≈ £16 / hr (≈ USD 20) |
| Indicative saving | up to ~80% vs a UK shop |
Rates are indicative and vary with scope, seniority and contract length. Ask us for a fixed quote on your build.
What We Build for London Companies
Fintech and payments platforms
Open Banking integrations, trading dashboards, lending and wealth products built with the audit trails FCA-regulated firms have to show.
iOS and Android apps
native builds in Swift and Kotlin, plus Flutter and React Native when one codebase gets you to market sooner for less.
Healthtech and NHS-facing products
patient-facing apps and clinical dashboards designed with UK GDPR and the NHS's DTAC assessment criteria in mind from the first sprint.
AI features that ship
chatbots, document intelligence and RAG pipelines on Python and OpenAI — running in production, not stuck in a proof-of-concept deck.
Enterprise systems and portals
internal tools, customer portals and workflow platforms on React, Angular, Node.js and PostgreSQL, built for procurement-grade scrutiny.
Why London Businesses Choose GTS
A fraction of London rates
senior engineering from about £16 an hour (roughly USD 20), against London agency day rates that commonly start at £600 per person.
Your morning is our afternoon
India sits 4.5–5.5 hours ahead, so standups, reviews and quick calls happen live across your entire morning.
No IR35 headaches
you're buying outcomes from a company under a straightforward B2B services contract — not a contractor arrangement your finance team has to assess.
A partner, not a vendor
transparent estimates, weekly reporting, full IP and source-code handover, and a 16-year record of clients who came back for the next build.
Industries We Know in London
Fintech and capital markets
From Canary Wharf institutions to Level39-stage startups, London fintech expects compliance-aware engineering — we build KYC flows, payment rails and reporting tools to that bar.
Media and creative
Streaming, publishing and subscription products for a city whose media brands compete globally for attention and can't afford a slow app.
Retail and e-commerce
Storefronts, loyalty programmes, click-and-collect and inventory sync for retailers defending thin online margins.
Healthtech and the NHS ecosystem
Appointment booking, remote monitoring and clinician tools for startups selling into NHS trusts, where procurement asks hard questions about data before anything else.
Govtech and public services
Accessible, WCAG-compliant citizen services built in the patterns the GOV.UK Design System made standard across the sector.
How We Work With London Clients
Engagement models that flex
fixed-scope builds, dedicated teams or extra capacity for your existing squad — priced in GBP and quoted itemised.
Live on UK hours
standups and demos booked into your morning, with decisions made on the call rather than in a 24-hour email loop.
Everything in writing
shared boards, weekly summaries and direct Slack access to the engineers — no account-manager filter between you and the code.
Clean handover, always
your repos, your cloud accounts, your IP — documented under ISO 9001:2015 process so nothing leaves with us.
Frequently Asked Questions
Do you have an office in London?
No. We're an India-based studio and we serve London entirely remotely — no UK office, no sales outpost. That's what keeps senior engineering at about £16 an hour, and with India 4.5–5.5 hours ahead we're live throughout your morning anyway.
Can you work with FCA-regulated businesses?
Yes — we've built fintech products for 16 years and we're used to the documentation regulated firms need: audit trails, access controls and traceable testing under ISO 9001:2015. Your compliance team sets the requirements; we build to them and hand over the paperwork.
How does your pricing compare to a London agency?
London agencies commonly bill £600–£1,200 a day per person. Our senior engineers start around £16 an hour — call it £130 a day — quoted itemised in GBP. Same stack, same code-review discipline, a very different invoice.
How much overlap do we get on UK working hours?
India is 4.5–5.5 hours ahead of London depending on the clocks, so our afternoon and evening cover your 9 am to roughly 2 pm. That's your standup, your code reviews and any demo — live. Anything after that gets a written update waiting for you next morning.
Where would our data and code be hosted?
Wherever you choose. Most clients keep everything in their own AWS accounts and their own repos under UK GDPR terms, and we work through access you grant and can revoke. You hold the credentials from day one.
What clients say
“I've done several jobs with Nav and his team"s work, communication, and timeliness are impeccable.”
“GTSInfosoft was extremely knowledgeable and patient with me on my first IT project. They were very accommodating and always available despite the time zone difference. Very reliable. Very responsible. Very patient. Very professional. I highly recommend.”
Get London-grade engineering without London rates
Tell us what you're building and we'll send back a fixed quote in GBP — scope, timeline and cost, no obligation.
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