ASP.NET Core Development Company
Want to build scalable applications? Leverage our advanced .NET Web Development solutions to meet your unique business needs.
Advanced Dot Net Development Services
At Three Circle, we build scalable, secure, and high-performance ASP.NET solutions tailored to your business goals. Our experienced development team creates custom web applications that improve efficiency, support growth, and deliver a seamless user experience. Whether you operate in healthcare, e-commerce, finance, or any other industry, our ASP.NET solutions are designed to help your business stay competitive and future-ready.
We develop custom ASP.NET applications tailored to your unique business requirements, ensuring flexibility, performance, and long-term scalability.
We build secure, well-documented REST APIs and microservices that connect your web and mobile apps, partners and third-party systems.
Our ASP.NET applications are built with strong security practices and reliable architecture to protect your data and ensure smooth operations
Custom .NET Web Development Solutions
Our custom .NET app development for e-commerce platforms can help you increase your online presence. Our personalized solutions are designed to improve user experience and optimize workflow.
Not sure where to start? Our digital transformation experts analyze your current systems and processes, then recommend a roadmap for modernization. From cloud migration to automation and data integration, we help you prioritize and execute the right initiatives.
We create industry-compliant solutions for the finance and healthcare industries with our .NET application development. To ensure reliable, smooth operations, these systems prioritize both security and performance.
Three Circle is a cloud-native .NET application development company, offering scalable solutions to meet your evolving business needs. We excel in developing unique, secure, and high-performing applications across different industries.
Our team ensures seamless communication and efficient workflows, completing your ASP dot NET projects on time and within budget. Efficiency is our top priority, ensuring high-quality results for your business.
We provide ongoing support and maintenance for your custom .NET applications, ensuring they function at their best. Our team manages updates, performance optimization, and troubleshooting to maintain the reliability and efficiency of your apps.
Hire Expert .NET Developers for App Development
Looking to hire expert developers for your .NET web development needs? At Three Circle, our skilled team of .NET developers has a proven track record in crafting custom and innovative applications across various industries. We ensure your projects are managed with precision and professionalism.
ASP.NET Core Projects in Production
Real products running on .NET back ends that we designed and built:
Courier ERP with Carrier Integrations
Stallionex: an ERP and client portal on ASP.NET Core, live in production with FedEx, DHL, TCS and M&P integrations.
AI Sports App on ASP.NET Core
Sport Betting IQ: a Flutter app with an ASP.NET Core back end and AI features powered by a large language model.
Invitation Platform on .NET and Azure
LuvInvite: web and mobile apps built with Flutter on a .NET back end hosted on Microsoft Azure.
Why Choose Three Circle for ASP.NET Development Services?
At Three Circle, we are committed to delivering advanced ASP dot NET development services to our clients. Our .NET developers work with ASP.NET Core, Blazor, Web API and Azure on live client products. With proficiency in various frameworks and technologies, our skilled team delivers dot NET development services that align seamlessly with your business goals.
Proven Expertise:
Our development team brings years of experience to every project, providing innovative solutions customized for your business.
Consistent Scalability:
We offer cloud-native .NET application development services to ensure your systems can scale effortlessly as your business grows.
Dedicated Support and Maintenance:
We provide continuous support and maintenance to ensure your .NET software development continues to operate at its best.
Comprehensive Development Services:
Our custom .NET development services cover a broad range of industries, from e-commerce platforms to enterprise-level applications.
Focused on Innovation:
We ensure that your business stays ahead of the competition with our ASP dot NET development services, driven by the latest technologies.
Reliable Delivery Flow
Efficient workflows ensure timely delivery while maintaining high quality standards.
ASP.NET Development Services We Offer
Three Circle is an ASP.NET development company that designs, builds and maintains business-critical web applications on Microsoft’s modern .NET platform. Whether you need a brand-new product, a secure customer portal or a faster version of an ageing system, our .NET developers cover the full lifecycle, from architecture and UI to cloud deployment and long-term support.
Custom ASP.NET Core Web Applications
We build fast, secure web applications with ASP.NET Core and the latest long-term-support release of .NET. From internal dashboards and booking systems to multi-tenant SaaS platforms, every application is designed around your workflows, user roles and growth plans.
Web APIs and Microservices
Our team creates clean, well-documented REST and gRPC APIs with ASP.NET Core Web API, so your web app, mobile apps and partners can share data securely. For larger systems we design microservices with containers, message queues and API gateways that scale independently.
Blazor and Modern Front-End Development
We build interactive user interfaces with Blazor, Razor Pages and MVC, or pair a .NET back end with React or Angular when that is the better fit. The result is a responsive, accessible interface that works on every device.
.NET Migration and Modernisation
Still running ASP.NET WebForms or .NET Framework 4.x? We migrate legacy applications to ASP.NET Core step by step, without stopping your business. Modernisation improves speed and security, lowers hosting costs and makes it easier to hire developers for the future.
Azure Cloud and DevOps
We deploy .NET applications to Microsoft Azure, AWS or Linux servers with automated CI/CD pipelines, staging environments, monitoring and auto-scaling, so releases are frequent, safe and predictable.
Integrations and Enterprise Systems
We connect your ASP.NET application to the tools you already use: Microsoft 365, Dynamics 365, Salesforce, HubSpot, payment gateways such as Stripe, ERP and accounting systems, and identity providers such as Microsoft Entra ID for single sign-on.
Running an older ASP.NET WebForms or .NET Framework application? See our .NET migration services. Need extra capacity? Hire .NET developers from our team.
ASP.NET Application Development Services
As an ASP.NET Core development company, we build the full application, not just the code: architecture, back end, front end, database, cloud hosting and support after launch. Typical ASP.NET applications we build:
Enterprise Web Applications
Internal systems for operations, finance, HR and logistics, with role-based access and audit trails.
Customer and Partner Portals
Secure portals where customers track orders, download documents and raise requests. See our guide to client portal development cost.
SaaS Products
Multi-tenant SaaS platforms with subscriptions, admin dashboards and reporting, built on ASP.NET Core and SQL Server or PostgreSQL.
APIs for Mobile Apps
ASP.NET Core Web APIs behind iOS, Android and Flutter apps, with authentication, push notifications and offline sync.
Real-Time Applications
Live dashboards, chat and tracking with SignalR.
Blazor Front Ends
Interactive web interfaces in C# with Blazor. Not sure which front end fits? Read Blazor vs React.
ASP.NET Core or .NET Framework: Which Do You Need?
New applications should be built on ASP.NET Core, the current, cross-platform version of ASP.NET that runs on Windows, Linux and containers. The older .NET Framework and ASP.NET WebForms only receive security fixes, so most teams move off them when they add major features.
Support for .NET 8 ends on 10 November 2026. If your application runs on .NET 8 or older, plan an upgrade to .NET 10. Read what to do before .NET 8 end of support or see our .NET migration services.
How Much Do ASP.NET Development Services Cost?
Our rates start from $35 per hour and projects start from $1,000. The total depends on the number of features, integrations and user roles. A starter MVP costs $3,000, or $1,500 when you claim our free clickable design of 5–6 key screens.
For typical price ranges, read our ASP.NET development cost guide, try the cost calculator, or hire dedicated .NET developers by the month.
Our ASP.NET Development Process
A clear, transparent process keeps your project on time and on budget. You always know what is being built, what it costs and what comes next.
- Discovery and planning: we review your goals, users and existing systems, then turn them into user stories, a technical architecture and a detailed estimate.
- UX/UI design: wireframes and clickable prototypes let you see and approve the experience before development starts.
- Agile development: we build in two-week sprints and demo working software at the end of each one, so you can give feedback early.
- Quality assurance: automated unit and integration tests, manual testing, performance checks and security reviews run throughout the project.
- Deployment and launch: we set up hosting, CI/CD and monitoring, migrate data and support you through go-live.
- Support and growth: after launch we keep your application secure and up to date, apply .NET updates and add new features as your business grows.
Our .NET Technology Stack
We choose proven, well-supported technologies so your application is easy to maintain for years to come:
- Frameworks: ASP.NET Core, ASP.NET Core Web API, Blazor, MVC, Razor Pages, Entity Framework Core, SignalR for real-time features
- Languages: C#, TypeScript, JavaScript, SQL
- Databases: SQL Server, Azure SQL, PostgreSQL, MySQL, Cosmos DB, Redis
- Cloud and DevOps: Microsoft Azure (App Service, Functions, Azure SQL, Key Vault), AWS, Docker, Kubernetes, GitHub Actions, Azure DevOps
- Security: ASP.NET Core Identity, OAuth 2.0 and OpenID Connect, Microsoft Entra ID, role-based access control, encryption at rest and in transit
- Testing: xUnit, NUnit, Playwright, automated code analysis
Engagement Models and Pricing
Every business is different, so we offer three flexible ways to work with our ASP.NET developers:
Fixed-Price Projects
Best for well-defined projects such as an internal tool or a website back end. You agree on scope, timeline and budget up front.
Time and Materials
Ideal for MVPs and evolving products. You pay for the actual time spent and can change priorities as you learn from users.
Dedicated .NET Team
A dedicated team of .NET developers, QA engineers and a project manager working only on your product, for long-term development and scaling.
Wondering about budget? Read our guide to ASP.NET development cost in 2026, try the app development cost calculator, or request a free, no-obligation estimate.
Related guide: Real-time web application development with SignalR.
ASP.NET Core HRM Software Case Study: 5,000+ Active Users
Result: 5,000+ active users across web and mobile.
We designed and built a complete human resource management (HRM) platform that helps an organisation run its workplace from one place. Today more than 5,000 people use it. HR teams use the web admin dashboard to manage employee records, track attendance and streamline day-to-day office operations, while employees use the companion mobile app to mark attendance, apply for leave and handle routine requests from their phones.
Technology: ASP.NET Core back end and secure APIs, Flutter mobile app for iOS and Android, React and Angular web front ends.
What we delivered:
- Centralised employee records with role-based access
- Attendance tracking for office and mobile staff
- Leave requests and approvals
- An admin dashboard for HR and management
- An employee self-service mobile app
- One secure ASP.NET Core API layer shared by the web and mobile apps
Planning a similar internal platform? Talk to our .NET team about your requirements.
ASP.NET Core and Flutter Case Study: Optimized Strength AI Fitness App
Result: 1,000+ app downloads.
Optimized Strength is an AI-powered fitness app that Three Circle built with a secure ASP.NET Core back end and a cross-platform Flutter mobile app. Users get a library of more than 1,300 exercises, personalised AI coaching and detailed progress tracking that turns every workout into clear, visual insights. Since launch, the app has passed 1,000 downloads.
Technology: ASP.NET Core back end and REST API, Flutter app for iOS and Android.
What we delivered:
- A scalable ASP.NET Core API and data layer powering the mobile app
- One Flutter codebase for iOS and Android
- A searchable library of 1,300+ exercises
- AI-powered coaching for personalised training
- Workout logging with progress charts and analytics
- Secure user accounts and data protection
Need a scalable back end for your mobile or web app? Talk to our ASP.NET developers.
Ready to Start Your .NET Development Project?
Build secure, scalable ASP.NET Core applications with Three Circle. Get a free estimate for your project.
- FAQs
Frequently Asked Questions
ASP dot NET is a powerful framework ideal for creating scalable and secure web applications. It enables rapid development of high-performance, enterprise-level solutions, offering flexibility and reliability.
.NET is ideal for developing enterprise-level applications, offering a high-performance, scalable, and secure environment. Its vast library support and cross-platform capabilities enables developers to quickly build reliable and flexible web solutions.
Across the market in 2026, simple ASP.NET web applications typically cost $15,000–$40,000, medium-complexity business applications $40,000–$100,000, and enterprise platforms $100,000 or more. Your price depends on features, integrations and compliance needs. See our ASP.NET development cost guide or contact us for a free, detailed estimate.
Yes. We assess your existing code, plan a phased migration to ASP.NET Core and the latest .NET release, and move features step by step so your business keeps running. Modernising improves performance and security and reduces hosting costs.
It designs, builds and supports web applications and APIs on ASP.NET Core: architecture, back end, front end, database, cloud hosting, testing and maintenance after launch.
.NET offers strong security features such as validation, encryption, and Code Access Security (CAS) to protect applications from vulnerabilities. Its integrated authorization and authentication frameworks ensure secure user access and data protection.
A simple ASP.NET web application usually takes 1–3 months, a medium-sized business application 3–6 months, and a complex enterprise platform 6–12 months or more. After discovery we give you a detailed timeline with clear milestones and keep you updated every sprint.
Yes. We offer ongoing support plans that include security updates, .NET version upgrades, performance monitoring, bug fixes and new features, so your application stays fast, secure and up to date.
Yes. You can hire individual ASP.NET developers or a complete dedicated team, including developers, QA engineers and a project manager, who work as an extension of your in-house team on a monthly basis.
New projects are built on ASP.NET Core and the current long-term-support version of .NET. We maintain and migrate older .NET Framework and WebForms applications.