.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 we work with UK clients on remote engagements with approximately four hours of GMT morning overlap daily. See our full services portfolio.

What London buyers typically need from .NET development

London's concentration of regulated industries shapes what .NET projects actually require. Common project types from FinTech, Insurance, Legal, and Media firms include:

• FCA-regulated API platforms: Payment initiation, open banking integrations, and trading system APIs built to FCA and PRA technical standards.
• Insurance policy and claims systems: Workflow engines and integration layers connecting legacy policy administration systems to modern web or mobile front-ends.
• Legal document management platforms: Matter management, client portals, and e-discovery tooling built on ASP.NET Core with SQL Server.
• Media content distribution APIs: High-throughput REST APIs for content delivery, subscription management, and digital rights tracking.
• UK GDPR and data compliance: All applications we build for UK clients include data residency controls, subject access request workflows, and audit logging aligned to UK GDPR obligations.

Financial services firms in London also face PRA operational resilience requirements, which affect availability targets, recovery time objectives, and third-party risk documentation. We account for these at the architecture stage, not after the system is built.

How we work with London clients

Our engineering team is based in India (IST, UTC+5:30). London operates on GMT (UTC+0) in winter and BST (UTC+1) in summer. London's 9am to 1pm window maps to 2:30pm to 6:30pm IST, giving us approximately four hours of synchronous time each working day for standups, architecture reviews, and live code walkthroughs.

We run weekly sprint reviews and planning sessions via Microsoft Teams or Slack, whichever the client prefers. Between calls, all work moves through Azure DevOps or Jira with async updates posted at end of day IST so London teams see them first thing in the morning. Pull request reviews happen within the same working day.

For major milestone reviews, architecture sign-offs, and UAT walkthroughs, we can arrange extended sessions or on-site visits in London for larger engagements. Most of our UK work runs entirely remote without issue.

All code is version-controlled from day one. Deployments are gated by CI/CD pipelines. Client data stays within the agreed infrastructure boundary, whether that is Azure UK South, UK West, or another agreed region.

Relevant work in similar markets

We do not have a published London client. Our closest published work is in FinTech and payments, industries that share technical and regulatory characteristics with London's financial services sector.

Mobile Payment Platform for SomBank: We built the first digital payment platform for an Islamic bank in Somalia using .NET, Azure Service Bus, Azure B2C, and an Ocelot API Gateway. The platform launched with over 100,000 downloads and a 4.8-star rating, enabling P2P transfers, merchant QR payments, and international remittances in a predominantly cash-based economy.

Varipay Cross-Border Payment Gateway: We built a payment gateway aggregator for an international remittance business in Jamaica, integrating Stripe, PayPal, Wise, and regional gateways through a microservices architecture. Transaction fees dropped by approximately 30 percent, and settlement times fell from 3 to 5 days to under 24 hours.

London FinTech and Insurance firms building payment or integration platforms on .NET will recognise the API gateway design, multi-provider routing, audit trail requirements, and identity management concerns we worked through in these projects. The underlying engineering problems are consistent across markets.

What .NET development costs for a typical London project

We bill in USD. London clients convert at prevailing GBP/USD rates. Typical project brackets for a .NET development engagement:

• Small ($2,000 to $8,000 / 80 to 200 hours): A single API module, one microservice, or a well-scoped integration between two existing systems.
• Medium ($8,000 to $30,000 / 200 to 600 hours): A full ASP.NET Core web application, a multi-service API platform, or a legacy modernisation with a new .NET layer.
• Large ($30,000 to $120,000 / 600 to 2,000 hours): An enterprise platform, a multi-tenant SaaS application, or a major system replacement.
• Platform ($120,000 to $400,000 / 2,000 to 6,000 hours): Long-running product development or an ongoing dedicated engineering team engagement.

London projects with UK GDPR, FCA, or PRA compliance scope typically add 15 to 25 percent to the base estimate for documentation, audit logging, and compliance review. Non-trivial system integrations, for example connecting to an insurance policy administration system or a trading platform, add $3,000 to $12,000 per connected system.

How to start working with us

Three steps to begin:

1. Discovery call (30 minutes): We discuss your project requirements, timeline, and any regulatory constraints. A technical conversation to understand scope, not a sales pitch.
2. Scoping document: We send a written scope within three working days covering architecture approach, team composition, timeline, and fixed-price or time-and-materials options.
3. Project start: Once scope is agreed, we set up project infrastructure (Azure DevOps or Jira, CI/CD pipeline, environments) and begin the first sprint within two weeks.

Use the contact form on this page to request a discovery call. We respond to all UK enquiries within one working day, accounting for the GMT/IST difference.

Can you work with London companies as a remote vendor?

Yes. All our UK client engagements run remotely. London's GMT morning window (9am to 1pm) overlaps with our India team's afternoon (2:30pm to 6:30pm IST), giving us four synchronous hours daily for standups, demos, and decisions. We use Microsoft Teams or Slack, host all code on Azure DevOps or GitHub, and can arrange London on-site visits for major milestone reviews on larger projects.

For UK GDPR data residency requirements, we deploy to Azure UK South or Azure UK West regions when clients require UK data residency. FCA-regulated firms should confirm their third-party outsourcing obligations with their compliance team before engaging any offshore vendor, including us. The ICO's UK GDPR guidance is the authoritative reference for UK data obligations. For FinTech-specific .NET work, see our FinTech .NET development page.