.NET, ASP.NET Core, and API Integration
Reliable .NET backends and clean API integrations that connect the systems you already run.
Overview
Most growing businesses do not need a single monolith — they need their existing systems to talk to each other reliably. I build and integrate .NET and ASP.NET Core backends, REST APIs, webhook handlers, and middleware services that connect CRMs, ERPs, payment providers, and front-end applications without becoming the next legacy headache.
I connect websites and applications with APIs, databases, forms, dashboards, and external services. I can create backend routes with .NET, ASP.NET Core, Node.js, and Express, then connect clean data flows to the frontend.
Key features
What is included.
ASP.NET Core APIs
Strongly typed minimal APIs and controllers with EF Core, validation, OpenAPI, and built-in DI.
System-to-system integration
Connect CRMs, ERPs, accounting tools, e-commerce platforms, and internal databases through reliable APIs.
Webhook receivers
Signed, idempotent, retry-safe webhook endpoints for Stripe, Shopify, GitHub, and custom partners.
Auth and authorization
OAuth 2.0, OpenID Connect, Azure AD, API keys, and role-based access for protected resources.
Data modeling
Normalized SQL Server or PostgreSQL schemas, migrations, indexing, and query performance tuning.
Observability and SLAs
Structured logs, Application Insights, distributed tracing, and alerts you can actually act on.
Benefits
Why this matters.
- Existing systems play nicely
- Clean integration layers stop fragile, brittle direct database connections between products.
- Enterprise-friendly stack
- ASP.NET Core fits naturally into Microsoft-shop environments with Azure, AD, and SQL Server.
- Long-term maintainable
- Strong typing, documented contracts, and idiomatic patterns make handover and upgrades painless.
- Predictable performance
- Async I/O, connection pooling, and caching tuned for the real shape of your traffic.
Process
How the work runs.
Inventory
Catalog the systems, data, and integration points already in play.
Contract
Lock API contracts, error semantics, and authentication before writing handlers.
Implement
Build and test the API surface with integration tests against real dependencies.
Connect
Wire the front end or partner systems, with full retry and idempotency handling.
Operate
Deploy, monitor, and document — including incident playbooks for failure modes.
Technologies
Tools I use.
Battle-tested choices for production work. Always picked to match the team and existing systems.
- .NET 8
- ASP.NET Core
- C#
- Entity Framework Core
- SQL Server
- Azure
- Node.js
- Express
- REST
- OpenAPI
- Application Insights
FAQ
Frequently asked questions.
- Do you only work with .NET, or also Node.js for APIs?
- Both. I pick the stack based on team familiarity, existing systems, and where the project will be deployed. The integration patterns are the same in either language.
- Can you integrate my CRM, ERP, and storefront?
- Yes. Common integrations include HubSpot, Salesforce, Pipedrive, Shopify, WooCommerce, Stripe, and accounting systems. Custom partner APIs are no problem.
- How do you handle long-running or async work?
- Background services (IHostedService, BackgroundWorker), Azure Functions, AWS Lambda, or Hangfire for scheduled and durable jobs — chosen to fit your hosting environment.
- What about versioning and breaking changes?
- APIs ship with semantic versioning, deprecation windows, and a documented migration plan. Webhook receivers stay backwards compatible by design.
Related services
Explore more.
Get started
Make your systems talk to each other
Share the systems you want connected and the data that needs to flow between them. I will propose the cleanest path with the least operational risk.