.NET & C# Developer UK — Enterprise Applications Built to Last
We design and build powerful, scalable .NET and C# applications for UK businesses — from ASP.NET Core web apps and REST APIs to desktop solutions and cloud-native systems engineered for performance and security.
What We Build
Everything We Build with .NET & C#
Our team delivers the full spectrum of .NET development — from bespoke web applications and enterprise systems to high-performance APIs and cloud-native solutions tailored for UK businesses.
ASP.NET Core Web Application Development
We build modern, high-performance web applications using ASP.NET Core — leveraging MVC, Razor Pages, and Minimal APIs to deliver fast, maintainable, and SEO-friendly solutions.
REST API & Web API Development
We design and build robust, well-documented REST APIs and Web APIs using ASP.NET Core — complete with OpenAPI/Swagger documentation, versioning, authentication, and full test coverage.
Blazor Web & Desktop Applications
We build interactive, component-driven UIs using Blazor WebAssembly and Blazor Server — delivering rich single-page applications without leaving the .NET ecosystem.
Microservices Architecture
We decompose monolithic .NET applications into scalable, independently deployable microservices using Docker, Kubernetes, and Azure Service Bus — built for resilience and scale.
Azure Cloud Solutions
We architect and deploy .NET applications on Microsoft Azure — including Azure Functions, App Service, Azure SQL, Cosmos DB, and Azure DevOps CI/CD pipelines.
WPF & Windows Desktop Applications
We build professional Windows desktop applications using WPF and .NET MAUI — ideal for internal business tools, data management systems, and custom enterprise software.
Database Design & Entity Framework
We design optimised SQL Server, PostgreSQL, and Cosmos DB schemas using Entity Framework Core — ensuring your data layer is fast, scalable, and maintainable for years to come.
Legacy .NET Migration & Modernisation
We migrate legacy .NET Framework and .NET 4.x applications to modern .NET 8 / .NET 9 — unlocking performance improvements, cross-platform support, and long-term Microsoft support.
E-Commerce & SaaS Platform Development
We build feature-rich e-commerce platforms and multi-tenant SaaS products with .NET — including Stripe payments, role-based access, subscription billing, and analytics dashboards.
Why .NET & C#
Why .NET is the Best Framework for UK Businesses
Microsoft's .NET ecosystem powers the world's most demanding enterprise applications — from banking platforms to government systems. Here's why it's the right choice for your business.
Exceptional Performance
.NET 8 consistently tops performance benchmarks. ASP.NET Core handles millions of requests per second — making it ideal for high-traffic, mission-critical applications.
Enterprise-Grade Security
Built-in support for OAuth 2.0, OpenID Connect, data protection, and OWASP best practices make .NET the trusted choice for finance, healthcare, and government sectors.
Limitless Scalability
.NET's async-first architecture and seamless Azure integration allow your application to scale from a handful of users to millions — without architectural rewrites.
Cross-Platform by Default
Modern .NET runs natively on Windows, Linux, and macOS. Build once, deploy anywhere — whether that's on-premises, Azure, AWS, or Google Cloud.
World-Class Developer Tooling
Visual Studio, Rider, and VS Code combined with the .NET CLI and NuGet ecosystem give your team the most productive development environment available.
Long-Term Microsoft Backing
.NET is backed by Microsoft with guaranteed long-term support (LTS) releases, regular security patches, and a roadmap extending decades into the future.
Industries & Use Cases
What UK Businesses Build with .NET & C#
Businesses across every sector rely on our .NET expertise to build their most important systems. Here's what we deliver.
FinTech & Banking
Secure payment platforms, trading systems, digital banking portals, and regulatory compliance tools built to FCA standards.
HealthTech & NHS Systems
Patient management systems, clinical decision tools, NHS-integrated portals, and GDPR-compliant healthcare data platforms.
Manufacturing & ERP
Custom ERP integrations, production tracking systems, inventory management, and workflow automation for UK manufacturers.
E-Commerce Platforms
High-performance online stores, B2B ordering portals, inventory systems, and payment gateway integrations.
Government & Public Sector
Secure citizen portals, case management systems, and public-facing digital services built to GDS standards.
Business Intelligence & Reporting
Custom dashboards, data warehouses, SSRS reports, and real-time analytics platforms for data-driven organisations.
SaaS Platforms
Multi-tenant SaaS products with subscription billing, role-based access control, and white-label capabilities.
System Integration & Middleware
Integration layers connecting legacy systems, ERP platforms, CRMs, and third-party APIs using .NET middleware.
How We Work
Our .NET Development Process
A structured, transparent delivery methodology that keeps you informed and in control — from requirements through to launch and beyond.
Discovery & Requirements
We deep-dive into your business requirements, existing systems, and technical constraints to define the ideal .NET architecture and delivery plan.
Architecture Design
Our senior architects design a scalable, secure .NET solution — selecting the right patterns, frameworks, and Azure services for your specific needs.
Agile Development
We build in two-week sprints with regular demos and a shared project board — so you see real progress and stay in full control throughout.
Testing & Security QA
Comprehensive unit, integration, and performance testing. Security audits against OWASP Top 10 included on every project before deployment.
Deployment & Support
We deploy via Azure DevOps CI/CD pipelines and provide dedicated post-launch support — monitoring, hotfixes, and performance tuning included.
Transparent Pricing
.NET & C# Development Pricing UK
No hidden fees. No lock-in contracts. Clear, fixed-price packages for UK businesses of every size.
- ASP.NET Core Web App or API
- Up to 10 API Endpoints
- SQL Server / PostgreSQL Integration
- JWT Authentication & Authorisation
- Azure App Service Deployment
- 30 Days Post-Launch Support
- Full-Stack ASP.NET Core Application
- Blazor or React Frontend Integration
- SignalR Real-Time Features
- Payment & Third-Party Integrations
- Azure DevOps CI/CD Pipeline
- 60 Days Dedicated Support
- Custom .NET Microservices Architecture
- Azure Kubernetes Service (AKS)
- Advanced Security & Penetration Testing
- Legacy .NET Migration Included
- Dedicated Senior .NET Architect
- 90 Days SLA-Backed Support
Why Choose Us
Why UK Businesses Choose Us for .NET Development
We're not a generalist agency. We're .NET specialists with deep C# expertise, a proven delivery process, and a track record of building enterprise-grade systems for UK businesses.
Certified .NET Specialists
Our developers hold Microsoft certifications and 4–8 years of hands-on .NET production experience building complex, high-traffic enterprise systems.
Transparent UK Pricing
Fixed-price projects with no surprise invoices. You know exactly what you're paying from day one — complete clarity, always.
Clear Communication
Regular sprint demos, weekly status updates, and a dedicated Slack channel. You'll always know exactly where your project stands.
Security-First Development
Every application follows OWASP Top 10 guidelines, Microsoft Security Baseline, and GDPR-by-design principles from the very first line of code.
Performance-Optimised Code
We benchmark, profile, and load-test every .NET application we deliver. Your system will handle production traffic without breaking a sweat.
Post-Launch Support Included
Every project includes dedicated post-launch support. We stay by your side through the critical first weeks and beyond as your trusted technology partner.
Technology Stack
.NET Technologies & Tools We Use
We work with the modern, battle-tested .NET ecosystem to build your applications right the first time.
FAQ
Frequently Asked Questions
.NET and C# development in the UK typically starts from £800 for simple APIs or internal tools, with production-grade web applications ranging from £1,400 to £5,000+. Enterprise platforms, microservices architectures, and legacy migrations are quoted on a bespoke basis after a free discovery call. All our pricing is fixed-price with no hidden costs.
Timelines depend on scope and complexity. A simple ASP.NET Core API or internal tool can be delivered in 2–4 weeks. A full-stack web application typically takes 6–12 weeks. Enterprise platforms, complex system integrations, and .NET migrations may take 16–24 weeks. We provide a detailed project timeline during our free discovery call.
.NET is the natural choice for enterprise applications, regulated industries (finance, healthcare, government), Windows-centric environments, and teams with existing Microsoft infrastructure. It offers superior performance benchmarks, world-class tooling, long-term Microsoft support, and exceptional integration with the Azure ecosystem. For projects requiring Linux-native microservices or JavaScript-first teams, Node.js may be preferable — we'll recommend the right stack for your specific needs.
Absolutely — legacy .NET migration is one of our core specialisations. We've migrated numerous .NET Framework 4.x applications to .NET 8, delivering significant performance improvements, cross-platform support, and access to the latest C# features. We conduct a thorough compatibility audit first, then execute the migration in phases to minimise business disruption and ensure zero downtime where possible.
Yes — Azure is our primary cloud platform for .NET deployments. We architect and deploy using Azure App Service, Azure Functions (serverless), AKS (Kubernetes), Azure SQL, Cosmos DB, Azure Service Bus, and Azure DevOps CI/CD pipelines. We're experienced with both consumption-based serverless architectures and always-on container deployments, selecting the right approach based on your traffic patterns and cost requirements.
Every project includes 30–90 days of dedicated post-launch support (depending on your plan), covering bug fixes, performance tuning, and security patches. Beyond that, we offer flexible retainer packages for ongoing .NET maintenance, feature development, Azure cost optimisation, and version upgrades. We become your long-term technology partner — not just a one-off vendor.
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