API & Integration Development

I connect systems that weren't designed to talk to each other. REST APIs, webhooks, data pipelines, third-party integrations — built to handle edge cases and fail gracefully.

What I deliver

I design and build APIs that connect your systems — whether that's syncing data between a CRM and an ERP, exposing internal services to partners, or building a public API for your product. Every integration comes with proper error handling, retry logic, and observability so you know what's happening in production.

Technologies

Most of my integration work is in C#/.NET with ASP.NET Core, but I'm comfortable working with REST, GraphQL, webhooks, message queues (Azure Service Bus, RabbitMQ), and file-based integrations (SFTP, CSV, XML). I've built integrations against Dynamics 365, Visma, Tripletex, Stripe, and dozens of custom systems.

What to expect

Clear API contracts (OpenAPI/Swagger), proper authentication (OAuth2, API keys, mTLS), structured logging, and documentation that your team can actually use. I test integrations against real sandboxes, not mocks.

Next step

Interested in this service?

Let's discuss your project and see how I can help.

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