.NET Development Company in London

QServices is a remote-first .NET development company serving London businesses in FinTech, Insurance, Legal, and Media. We are not headquartered in London but work with UK clients on remote engagements with roughly three hours of GMT morning overlap each day.

What London buyers typically need from .NET development

London's financial services sector runs heavily on .NET. FinTech firms need API-first payment backends built to FCA authorisation requirements. Insurers need policy and claims platforms that satisfy UK GDPR data handling obligations and PRA operational resilience standards. Legal firms need document workflow APIs that hold up under ICO audits. Media businesses need content platforms that scale on Azure.

The project types we see most often:

• Payment and transaction platforms for FCA-authorised FinTech firms: audit trails, reconciliation engines, open banking API integrations on ASP.NET Core and Azure Service Bus
• Policy and claims management systems for Insurance businesses: UK GDPR-compliant data retention, PRA-ready third-party vendor documentation, SQL Server backends
• Contract and matter management APIs for Legal firms: document lifecycle automation and case management integrations on .NET 8 and Entity Framework
• Content and distribution platforms for Media businesses: Azure App Service deployments with CI/CD from day one

UK GDPR, FCA authorisation obligations, and PRA resilience rules place specific requirements on any offshore .NET supplier. We treat these as scoping inputs: data residency, encryption, audit logging, and vendor due diligence documentation are hard requirements, not optional additions.

How we work with London clients

Our engineering team works from India at IST (GMT+5:30). When London opens at 9am GMT, our engineers are already at 2:30pm IST and have been working since mid-morning. That gives us a live overlap window of 9am to 12:30pm GMT each day without asking anyone to work unusual hours on either side.

Our standard cadence: a 30-minute weekly video standup on Microsoft Teams or Google Meet, async daily updates in Slack or Teams, and fortnightly code-review sessions where your technical lead steps through the sprint branch with us. Pull requests are documented in English with context notes for reviewers. Milestone reviews (architecture sign-off, UAT walkthroughs, go-live preparation) are scheduled as shared-screen video sessions in the overlap window.

All code is version-controlled on GitHub or Azure DevOps from the first commit. On-site visits to London are available for larger engagements but are not part of our standard model.

Relevant work in similar markets

We have not had a client physically headquartered in London. Our closest reference work is in regulated financial services, which is where most London .NET demand sits.

For SomBank, we built a mobile payment platform on .NET with Azure Service Bus, Azure B2C, and an Ocelot API Gateway, covering P2P transfers, merchant QR payments, and international remittances. The platform reached 100,000 downloads with a 4.8-star rating at launch. The compliance context was Somalia's central bank rather than the FCA, but the core disciplines are the same: typed API contracts, full audit logging, token-based access control, zero-downtime deployments.

For Varipay, a cross-border payment gateway aggregator, we cut settlement times from 3-5 days to under 24 hours and reduced transaction fees by approximately 30% through optimised gateway routing across Stripe, PayPal, Wise, and regional providers. A London FinTech firm building on UK open banking rails would start from a very similar microservices architecture.

We have also delivered .NET API and integration work for FinTech businesses outside these published case studies. If your use case is specific, we can share relevant technical context on a discovery call.

What .NET development costs for a typical London project

We price engagements in USD. London clients typically budget in GBP; convert at the current rate for planning purposes. For FCA- or PRA-regulated scope, add 15-25% for compliance overhead: audit logging, data residency controls, penetration testing, and vendor due diligence documentation.

• Small ($2,000-$8,000 / 80-200 hours): A single .NET API service, a data migration, or a targeted extension to an existing application
• Medium ($8,000-$30,000 / 200-600 hours): A standalone microservice, a third-party integration, or a reporting platform with Entity Framework and SQL Server
• Large ($30,000-$120,000 / 600-2,000 hours): A full platform with authentication, role-based data model, multiple integrations, and CI/CD pipeline on Azure DevOps
• Platform ($120,000-$400,000 / 2,000-6,000 hours): Multi-tenant SaaS, enterprise workflow automation, or a large-scale Azure App Service migration

See our .NET development cost breakdown for detail on what drives project cost up or down.

How to start working with us

Getting started takes three steps:

1. Discovery call (30 minutes): We discuss what you are building, what constraints matter (FCA authorisation status, UK GDPR data residency, existing .NET codebase), and whether the scope fits our team.
2. Scoping document: We send a written summary covering approach, tech stack, timeline, and cost range within five business days.
3. Project start: Once the statement of work is signed, we assign a lead .NET developer and begin the first sprint within one week.

Can you work with London companies remotely?

Yes. All our UK client work is remote. Our India-based team (IST, GMT+5:30) overlaps with London between 9am and 12:30pm GMT each working day. Standups, code reviews, and demos happen in that window via Microsoft Teams or Google Meet. For UK GDPR, we sign a Data Processing Agreement as standard in every UK engagement and can provide a vendor information security pack for your FCA or PRA third-party risk register. The ICO's UK GDPR guidance for organisations covers the specific obligations your DPA with us will need to satisfy.