29 Jan 20255 min read
API Development Best Practices in .NET: RESTful APIs with ASP.NET Core
Sukriti SrivastavaRead more
Software Engineering · .NET
Dot NET Development Company for enterprise-grade ASP.NET applications.
MetaDesign Solutions is a Dot NET Development Company that ships enterprise APIs, Blazor applications, and Azure-native services for banks, healthcare networks, and SaaS platforms. Our ASP.NET Application Development Services cover the full lifecycle: greenfield builds, .NET Framework to .NET 8 migrations, and ongoing platform engineering.
ASP.NET Core Web APIs & Microservices
Legacy .NET Framework Modernisation
Full-stack Blazor Web Applications
Azure-native Cloud Application Development
Enterprise Portal & CMS Integration
Database Design & Entity Framework Tuning
60+
.NET projects delivered
Enterprise APIs, portals, and Azure-native apps.
15+
Certified Specialists
Microsoft-certified C# and Azure developers.
99.99%
Availability achieved
Mission-critical systems with Azure failover.
3.2x
Throughput Boost
Average speedup migrating Framework to .NET 8.
Why MetaDesign
Why pick us as your ASP.NET Development Service Company
We have shipped .NET since the .NET Framework 2.0 era. 60+ enterprise projects, 15+ Microsoft-certified specialists, and a delivery model audited to CMMi Level 3.
01
Enterprise Architecture
Clean Architecture, DDD, and CQRS patterns. We build microservices designed for enterprise scalability, high reliability, and modular business growth.
02
Azure-Native Solutions
Azure App Service, Functions, and Entra ID are our daily tools. We containerize workloads with Docker and AKS, ensuring seamless auto-scaling under load.
03
Cross-Platform Runtime
.NET 8 and .NET 9 run natively on Windows, Linux, and macOS. We help you deploy to Azure, AWS, or on-premise infrastructure without any vendor lock-in.
Banking Systems
Core banking APIs, payment processing, and compliance reporting built on ASP.NET Core and SQL Server. We have shipped clearing systems, loan-origination platforms, and PCI-DSS-compliant payment gateways for banks across India, the UK, and the US.
Enterprise Portals
Secure intranet portals, HR platforms, and business process automation built on ASP.NET Core with SAML, OAuth2, and Microsoft Entra ID. We ship portals that handle 50,000+ concurrent internal users without breaking a sweat.
Azure Cloud Apps
Cloud-native ASP.NET applications running on Azure App Service, AKS, and Azure Functions. We design for cost ceilings, not just performance, so your bill stays predictable when traffic spikes 10x overnight.
Modernisation
Migrate .NET Framework 4.x apps to .NET 8 or .NET 9 with the strangler-fig pattern. Average outcome on our last 12 migrations: 3.2x throughput, 40% lower Azure spend, zero days of downtime during cutover.
Industries we ship .NET for
We build scalable and compliant .NET solutions tailored for highly regulated and complex enterprise environments.
Our approach
Five stages, paired end-to-end.
Predictable delivery. No black-box sprints.
01
Assess
Audit existing systems and define a modernization roadmap, prioritizing performance and scalability from day one.
02
Architect
Design Clean Architecture, CQRS patterns, and Azure infrastructure to minimize technical debt and maximize extensibility.
03
Build
Iterative development with xUnit, FluentAssertions, and SonarQube, following a blueprint tailored to your business.
04
Harden
Rigorous security scanning, load testing under peak traffic simulation, and comprehensive Azure compliance validation.
05
Deploy
Automated Azure DevOps CI/CD pipelines, secure container deployment to AKS, and real-time application monitoring.
Customer value
Six places it pays back in the first sprint.
Real outcomes our clients report within the first engagement cycle.
Faster time-to-market
First production deploy by end of week one. Our last 8 .NET engagements averaged 9 working days from kickoff to first PR merged.
Reduced technical risk
Architecture Decision Records, weekly code reviews, and SonarQube quality gates in every sprint. Critical defects caught before production: 96% across our last 20 projects.
Measurable velocity
Cycle time, PR throughput, and defect density tracked in a dashboard you can read. You will know if a sprint slipped before the standup tells you.
Cost predictability
Fixed-price for defined scope, capped T&M for evolving scope. Invoices match the estimate or we cover the difference. Written into every MSA.
Continuous improvement
Sprint retros, blameless post-mortems, and a quarterly engineering review with your CTO. Process changes get tracked, not just discussed.
Knowledge transfer
Every engagement ends with a knowledge-transfer plan. Pair programming, written runbooks, and recorded workshops live inside your repo when we leave.
Technology
Tools our .net developers ship with.
We use what works. No vendor lock-in.
.NET 8ASP.NET CoreBlazorC# 12Entity FrameworkDapperMediatRAutoMapperxUnitNSubstituteFluentAssertionsBenchmarkDotNetAzureSQL ServerDockerKubernetes
By the numbers
400+
Engineers worldwide
200+
Active clients
20yr
Pure-play software
94%
Client retention
Engagement models
Three ways to work with our .NET team.
Scale up, scale down — zero procurement headaches.
Fixed-scope project
Start-to-finish delivery with total cost, timeline, and scope agreed upfront. Best for well-defined builds and launches.
BEST FORNew product launches
Dedicated team
A ring-fenced squad — PM, tech lead, engineers, QA — fully managed by us, embedded in your workflow.
BEST FORLong-running platforms
Staff augmentation
Plug senior engineers into your existing team and tools. You manage priorities, we deliver results.
BEST FORCapacity gaps & sprints
FAQ
Asked first, every time.
Don't see yours here? Send us the question — a principal engineer will reply within 24 hours.
Pick .NET if your team already knows C#, you deploy on Azure, or you need first-class Microsoft tooling (SQL Server, Power BI, Dynamics 365). Pick Java if you are Linux-first, run on AWS, or have a JVM-heavy ecosystem. Both ship enterprise software at scale. If you are starting fresh in 2026, .NET 8 is faster, smaller, and cheaper to run than the JVM for most API workloads.
Yes. We use the Microsoft .NET Upgrade Assistant and an incremental migration approach — moving project by project while maintaining backward compatibility.
Yes. Blazor Server for internal tools and Blazor WebAssembly for interactive SPAs — full-stack C# without JavaScript.
We use the Azure SDK for .NET and managed identities by default, so secrets stay out of code. Common patterns we ship: Entra ID (formerly Azure AD) for identity, Service Bus for messaging, Cosmos DB for NoSQL, Azure Functions for event-driven workloads, and Application Insights for observability. Our Dot NET Development Services include a free 1-hour Azure architecture review for new clients.
We build ASP.NET Core APIs that target .NET 8 and compile to Linux containers. We ship them on AKS, EKS, or any Kubernetes cluster you already run. Typical numbers from our last enterprise build: P50 latency under 30ms, P99 under 150ms, 50,000 requests per second from a 3-node cluster.
We use MediatR for command/query separation, FluentValidation for input validation, and Entity Framework with domain entities following DDD aggregates. Event sourcing with Azure Service Bus or Kafka enables eventual consistency across microservices.
Three rules we follow. One, AsNoTracking() for every read-only query. Two, explicit Include() on every navigation property, never lazy-load in production. Three, when EF Core cannot generate the SQL we need (heavy reporting, multi-million-row aggregates), we drop to Dapper or raw SQL inside the same DbContext. Trying to make EF Core do everything is the most common mistake we see in inherited .NET codebases.
We use the built-in Microsoft.Extensions.DependencyInjection container, no third-party libraries. Lifetime rules we enforce: HTTP clients and DbContexts are Scoped, stateless helpers are Singleton, anything holding per-request state is Transient. Captive dependencies (a Singleton injecting a Scoped) are caught at build time, not at runtime.
Yes. The pattern we use: extract the WCF contract, rewrite as a .proto file, generate the gRPC service stubs in .NET 8, and run WCF and gRPC side-by-side until every consumer has switched over. Payload size typically drops 60-70%, P99 latency drops 40-50%.
We use the Microsoft.Identity.Web library for token validation, OAuth 2.0 Bearer tokens for API auth, and claims-based authorization policies tied to Entra ID groups. App registrations, role assignments, and conditional access policies get version-controlled in Bicep or Terraform so security is reproducible, not tribal knowledge.
.NET delivers superior performance in benchmarks, strong typing with C#, and enterprise-grade tooling. Node.js offers a lighter footprint and JavaScript universality. We recommend .NET for enterprise backends with Azure integration and Node.js for lightweight real-time services.
At MetaDesign Solutions, dedicated ASP.NET developers cost between $25 and $45 per hour, depending on seniority and Azure certifications. Mid-level developers (4-7 years) average $30 to $35 per hour. Senior leads and architects sit at $40 to $45 per hour. Fixed-scope .NET projects typically range from $15,000 (a 6-week MVP) to $250,000+ (a multi-quarter enterprise platform). Get a written estimate in 48 hours after a 30-minute scoping call.
Hire expert .NET developers for enterprise systems.
Tell us about your project. We'll come back with a plan, a timeline, and the right team — no obligations.