⭐ 15 ratings with a full score (5 stars) — I commit to precise execution, code quality, and professional delivery that fully meets your requirements. I offer professional services in system integration and connectivity using RESTful API, with the capability of creating complete API for any existing database you have, backed by over 12 years of practical experience in system development and programming integration. The service includes: ✅ Creating REST API for any database (whether the system is old or new) ✅ Support for databases: SQL Server MySQL Oracle ✅ Connecting internal systems with external systems ✅ Connecting systems with mobile applications (Flutter) ✅ Connecting booking and appointment systems ✅ Connecting chatbots with the system ✅ Building API from scratch based on your needs ✅ Complete documentation for the API (Swagger / Postman) ✅ Securing the API (JWT – API Key – Permissions – Roles) I work with: ASP.NET Web API SQL Server Enterprise systems The service is suitable for: Old systems needing API Administrative systems Booking systems Mobile applications Chatbots Post-execution technical support 💼 12 years of experience in system development and integration between different systems. 📩 To place an order, please contact me privately and provide your phone number for a free evaluation of your project and to determine the best way to create and connect the API.