Build secure, scalable and business-focused web applications with a dedicated .NET development team. Briltus provides custom .NET development services for businesses looking to build, improve or modernize web applications, portals, APIs and enterprise solutions.

Tailored .NET Development Services for Your Business

Whether you are launching a new enterprise product, upgrading a mission-critical platform, or connecting disparate business systems, our custom .NET development services adapt directly to your operational workflows, scalability requirements, and technical strategy.

Custom .NET Web Applications

We build secure, business-centric web applications tailored around your internal workflows, data models, and team operations. From administrative portals to complex workflow automation platforms, we deliver web software designed to streamline operations and scale alongside your business growth.

ASP.NET Development

Utilize the time-tested power of Microsoft’s ASP.NET technology stack to construct reliable, high-performance web solutions. We architect, build, and support enterprise-grade web applications with robust security controls, predictable performance, and maintainable C# codebases.

ASP.NET Core Development

Leverage modern, high-speed, cross-platform architecture with ASP.NET Core. Designed for high throughput and cloud deployment, ASP.NET Core enables us to build lightweight web applications, modern microservices, and backend APIs optimized for cloud platforms like Microsoft Azure.

.NET API Development & System Integrations

Connect your business applications, databases, cloud platforms, and third-party SaaS tools with high-performance RESTful APIs. We design secure, scalable, and fully documented web services that enable seamless data exchange across your software ecosystem.

Enterprise .NET Solutions

Address complex, large-scale software needs with enterprise .NET architectures built for high availability, multi-tenant structures, and role-based access control (RBAC). Our enterprise solutions handle heavy transactional workloads, sensitive data processing, and multi-system integrations without sacrificing stability or speed.

.NET Application Modernization

Breathe new life into legacy ASP.NET systems. We conduct comprehensive architectural audits to refactor outdated codebases, migrate applications to ASP.NET Core, resolve technical debt, and upgrade database infrastructure to enhance system performance, user experience, and security compliance.

Need a custom .NET solution for your project?

Have unique technical specifications, legacy platform constraints, or custom software requirements not listed above? [Tell us what you're trying to build →], and our lead developers will evaluate your architecture to recommend the right engineering approach.

Our Step-by-Step .NET Development Process

We follow a structured, phased engineering methodology designed to mitigate risk, eliminate costly rework, and ensure on-time delivery. Every phase includes concrete deliverables and explicit sign-off milestones so you maintain complete control throughout your application’s build.

1.Discovery & Business Requirements Gathering:Phase 1: Foundation & Planning.Before writing code, we conduct structured discovery workshops with your stakeholders to define application objectives, user personas, operational workflows, and technical constraints.

• Technical Architecture Mapping: Selection of database models, cloud hosting, and required API integrations.
• Functional Requirements Specification (FRS): Documented user stories, workflow diagrams, and project scope boundaries.
• Project Roadmap: Clear milestone schedules, sprint allocations, and resource assignments.

2.UI/UX & Architectural Design:Phase 2: Prototyping & Sign-off.We bridge functional requirements with user-centric design by mapping out complete wireframes, component systems, and visual interfaces before core development begins.

• Interactive Wireframes: Clickable prototypes mapping user navigation flows and core administrative functions.
• Responsive UI Design: Modern, brand-aligned visual design system optimized for desktop, tablet, and mobile browsers.
• Client Design Sign-off: Complete prototype review and formal visual approval before writing frontend or backend code.

3.Iterative .NET Development & Backend Architecture:Phase 3: Core Engineering & Integration.Using C#, ASP.NET Core, and Entity Framework, our developers build your solution in transparent, bi-weekly Agile sprint cycles with functional code demos at each stage.

• Clean Codebase Construction: Modular, strongly-typed C# backend development built on SOLID architectural principles.
• Database & API Integration: Secure schema design on SQL Server and RESTful middleware integration with external SaaS tools.
• Regular Progress Demos: Bi-weekly sprint reviews providing direct visibility into fully functional software modules.

4.Comprehensive QA, Performance & Security Testing:Phase 4: Verification & Hardening.Our dedicated Quality Assurance (QA) team conducts multi-layered testing across every workflow to catch bugs, resolve performance bottlenecks, and eliminate vulnerabilities before launch.

• Functional & Integration Testing: Automated regression checks and thorough manual verification of user workflows.
• Security Audits & OWASP Checks: Penetration testing, role-based access control (RBAC) validation, and data encryption checks.
• Cross-Browser & Performance Tuning: Stress testing under peak database queries across all major web browsers and viewports.

5.Production Deployment & Handoff:Phase 5: Launch & Transition.We handle the complete release engineering process to move your application into live production environments smoothly with zero planned downtime.

• Cloud Provisioning: Environment configuration on Microsoft Azure or on-premises servers with automated CI/CD pipelines.
• User Acceptance Testing (UAT): Final client validation and formal sign-off in a production-identical staging environment.
• Zero-Downtime Go-Live: Controlled deployment, database migration, domain setup, and administrative user onboarding.

6.Post-Launch Support, Monitoring & Maintenance:Phase 6: Evolution & SLA Support.After deployment, Briltus provides active system monitoring, framework upgrades, and continuous feature updates to keep your application fast, secure, and available.

• 24/7 Health & Uptime Monitoring: Proactive server tracking, performance monitoring, and log analysis.
• SLA-Backed Technical Support: Dedicated support channels for immediate bug fixes, patch management, and server maintenance.
• Continuous Enhancements: Scalable development plans for introducing new features and API integrations as your business grows.

What is .NET development?

.NET development involves building websites, web applications, APIs, business applications, and software solutions using Microsoft's .NET technology ecosystem. Businesses use .NET to develop solutions ranging from customer-facing web applications to internal business systems and enterprise software.

What does a .NET development company do?

A .NET development company helps businesses plan, build, improve, and maintain applications using .NET technologies. Depending on project scope, this includes full-lifecycle custom application development, ASP.NET Core web development, API integration, legacy software modernization, and ongoing application maintenance.

• Custom .NET application development
• ASP.NET development
• ASP.NET Core development
• API development
• Business application development
• Enterprise application development
• Third-party integrations
• Application modernization
• Maintenance and support

TYPES OF .NET APPLICATIONS WE CAN BUILD

What can you build with .NET?

• Business Applications: Custom applications designed around your internal business processes, operations, and team workflows.
• Customer Portals: Secure, scalable web portals that allow customers to access account functionality, self-service tools, and business information.
• Partner & Vendor Portals: Centralized platforms that help businesses manage communication, vendor workflows, and data sharing across external partners.
• Enterprise Applications: High-availability applications built to support complex business logic, large user bases, distributed data, and enterprise system integrations.
• SaaS Applications: Web-based software products structured for multi-tenant architectures, designed to serve growing customer bases securely.
• Dashboards & Admin Systems: Centralized control interfaces for real-time reporting, user management, and operational decision-making.
• APIs & Backend Systems: High-performance REST APIs and backend microservices that connect disparate applications and handle data exchange.

WHY .NET FOR BUSINESS APPLICATIONS?

Why choose .NET for your business application?

• Scalability: .NET supports applications that need to grow seamlessly as user volume, data loads, and business demands increase.
• Integration: .NET applications easily connect with external APIs, relational databases, cloud infrastructure, and third-party tools.
• Maintainability: A structured, strongly-typed architecture makes long-term codebase maintenance and feature updates predictable and cost-effective.
• Modern Development: Modern .NET and ASP.NET Core offer high-performance frameworks for building web apps, microservices, and cross-platform backend services.
• Microsoft Ecosystem: .NET integrates natively with Microsoft Azure, SQL Server, Active Directory, and corporate IT environments.

ASP.NET and ASP.NET Core development

Briltus provides ASP.NET development for businesses that need custom websites, web applications, and secure backend solutions. Where appropriate for the project, we build modern, high-performance applications using ASP.NET Core and the broader .NET ecosystem.

Core Technology Stack

Our developers utilize a proven Microsoft stack alongside modern web frameworks:

• ASP.NET & ASP.NET Core for robust server-side web application delivery.
• C# for strongly-typed, maintainable application backend logic.
• Entity Framework for efficient database access, ORM mapping, and query execution.
• SQL Server for reliable, enterprise-grade relational data management.
• REST APIs for seamless integration and backend service architecture.
• Azure Cloud for secure hosting, auto-scaling, and DevOps deployment.
• React & Angular for fast, responsive frontend user interfaces.

Custom .NET development for your business

Every business application has unique technical and operational requirements. Our .NET development approach starts with understanding your exact goals, end-user expectations, and integration points with existing infrastructure.

Whether building a new platform from scratch or updating an existing software application, we align project scope directly with your business requirements.

• New Application: Build custom software from the ground up tailored to your business specs.
• Existing Application: Upgrade features, resolve code debt, or optimize performance for existing .NET systems.
• Integration: Securely connect applications, databases, and third-party services using RESTful APIs.
• Modernization: Refactor or migrate legacy ASP.NET systems to modern .NET Core for improved security and performance.
• Ongoing Development: Continuous support, continuous updates, and feature enhancements as your business evolves.

How much does .NET development cost?

The cost of a .NET development project depends on factors such as application complexity, feature set, third-party integrations, UI/UX design requirements, database architecture, total development effort, and post-launch maintenance expectations.

Because a lightweight internal business tool and a multi-tenant enterprise software solution carry vastly different scope profiles, the most accurate way to establish a cost estimate is through an initial technical evaluation of your specific requirements.

How long does a .NET development project take?

Development timelines depend directly on scope size, functional complexity, system integrations, custom UI/UX design, quality assurance requirements, and project team allocation.

A clear, well-defined scope allows our development team to map realistic delivery timelines and outline critical sprint milestones before coding begins. While a standard business web application typically takes 4–8 weeks, enterprise-grade systems or SaaS platforms may take 2–4 months.

How to choose a .NET development partner

01 — Relevant experience

Partner with a software vendor that demonstrates a track record of building applications similar in domain complexity and scale to your planned project. Look for documented expertise across full-stack .NET architectures.

02 — Technical capability

Evaluate the team’s hands-on experience across modern Microsoft frameworks, cloud ecosystems (Azure), databases (SQL Server), and frontend integrations (React, Angular). Ensure they follow secure coding standards and modern software practices.

03 — Development process

Understand how the company structures discovery, development sprints, code reviews, testing, and deployment. An agile, milestone-based development lifecycle ensures complete visibility throughout project execution.

04 — Communication & time zone alignment

Ensure clear communication protocols are established upfront. Choose a engineering partner that offers structured progress updates, transparent toolsets (Jira, Teams, Slack), and team availability aligned with your operating hours.

05 — Post-launch support

Confirm what ongoing maintenance options are available after deployment. A reliable tech partner offers SLA-backed technical support, security patching, and server monitoring to ensure application stability post-launch.

06 — Relevant project examples & case studies

Review actual portfolio work, case studies, and reference clients to verify execution capability.

Enterprise Portal Modernization

• Client Challenge: A logistics provider faced severe performance bottlenecks with a legacy ASP.NET application managing driver scheduling and client invoicing.
• Our Solution: Re-architected the legacy codebase into a high-performance ASP.NET Core backend deployed on Microsoft Azure, integrated with a lightweight React dashboard.
• Results: 65% faster query response times, seamless handling of peak load spikes, and automated real-time status notifications via REST APIs.

Multi-Tenant B2B SaaS Platform

• Client Challenge: A healthcare services provider required a centralized portal for clients to securely access data, issue requests, and monitor compliance metrics.
• Our Solution: Developed a custom .NET Core portal with strict role-based access control (RBAC), SQL Server encryption, and custom vendor integration endpoints.
• Results: Delivered on time within a 12-week development cycle, providing enterprise-grade security and reducing administrative overhead by 40%.

1. What does a .NET development company do?

A .NET development company helps businesses build, improve, integrate, and maintain websites, web applications, APIs, and business software using .NET technologies.

2. How much does .NET development cost?

The cost depends on the project's scope, complexity, features, integrations, design requirements, development effort, and ongoing support needs. Share your requirements with us for a project-specific estimate.

3. How long does a .NET development project take?

Timelines vary depending on application complexity, features, integrations, and testing requirements. A defined scope allows the development team to provide a more realistic project timeline.

4. Do you provide custom .NET development?

Yes. Custom .NET development can be structured around your business workflows, users, integrations, and application requirements.

5. Can you develop ASP.NET Core applications?

Yes, where ASP.NET Core is appropriate for the application's requirements. Our team can discuss the technology approach based on your project scope.

6. Can you modernize an existing .NET application?

We can assess existing applications and discuss options for upgrades, modernization, or migration based on the application's current architecture and business requirements.

7. Do you provide API and third-party integrations?

Yes. API development and third-party integrations can be included depending on the systems and requirements involved.

8. Can I hire a dedicated .NET development team?

Yes. If you need additional development capacity rather than a complete project delivery, Briltus can discuss dedicated .NET developer or team requirements.

9. Which database management systems do you use with .NET?

We primarily work with Microsoft SQL Server, PostgreSQL, and MySQL. For high-volume data or cloud-native applications, we also integrate NoSQL databases like MongoDB or Azure Cosmos DB depending on your performance and query requirements.

10. Can you integrate .NET applications with Microsoft Azure?

Yes. We build and deploy cloud-ready .NET applications on Microsoft Azure, leveraging Azure App Services, Azure Functions, Azure SQL Database, and Azure Active Directory for scalable, enterprise-grade cloud hosting and security.

11. Do you sign a Non-Disclosure Agreement (NDA)?

Yes. We prioritize the security of your intellectual property and business logic. We sign a strict NDA prior to reviewing your project documentation or starting discovery.

12. What frontend technologies do you pair with .NET backend services?

We frequently build frontend interfaces using modern JavaScript/TypeScript frameworks such as React, Angular, or Vue.js. For unified, full-stack C# development, we can also build applications using Blazor.

13. How do you handle project management and client communication?

We follow an Agile development workflow with regular sprints and milestone demos. Communication takes place via dedicated tools like Slack/Teams, while task progress and issue tracking are visible through tools like Jira or Trello.

14. What happens after the application is launched?

We provide post-launch maintenance, monitoring, security updates, bug fixes, and continuous feature enhancement packages to ensure your application remains operational, secure, and aligned with your growing business.

15. Can you migrate a legacy ASP.NET Web Forms application to ASP.NET Core?

Yes. We perform architectural audits on legacy ASP.NET (Framework) systems to plan phased refactoring or full migration to ASP.NET Core, enabling cross-platform capability, improved security, and faster processing speeds.

16. Do you build SaaS (Software-as-a-Service) products using .NET?

Yes. We design and develop multi-tenant SaaS platforms using .NET Core and cloud architectures that feature tenant isolation, subscription billing integrations, automated scaling, and centralized administration.

17. How do you ensure the security of .NET applications?

We apply secure software development lifecycles (SSDLC), including role-based access control (RBAC), data encryption at rest and in transit, input sanitization against OWASP vulnerabilities, and secure authentication protocols like OAuth 2.0 / OpenID Connect.

18. What is the difference between ASP.NET Framework and ASP.NET Core?

ASP.NET Framework runs primarily on Windows environments, while ASP.NET Core is an open-source, cross-platform, high-performance framework that runs on Windows, Linux, and macOS, making it ideal for modern web applications and microservices.

19. Can you work with our in-house IT and development team?

Yes. We offer team augmentation models where our senior .NET developers integrate directly into your existing development workflows, code repository pipelines, and sprint schedules to accelerate delivery.

20. How do we get started with Briltus on a .NET project?

You can get started by submitting your requirements through our contact form or requesting a project quote. We will arrange an initial discovery call to review your scope, evaluate technical dependencies, and provide a tailored project plan.