Senior C# .NET Developer - Netsapiens Integrations - Florianópolis

We are looking for a **senior C# /.NET / NetSapiens developer based in Florianópolis**, Brazil for a remote contract role focused on telecom and call-center systems integration. It's mostly a remote position, except for limited face to face meetings in the future, hence the preference for residents of Florianópolis and adjacent areas.
**This is not a generic.NET position.** A key requirement is **hands-on experience with the NetSapiens platform**, including its APIs and subscription-based event model. We need someone who already understands how NetSapiens works in practice and can build reliable software around live telephony and operational data.
**Responsibilities**
- Build and maintain backend services that integrate with NetSapiens.
- Consume, process, and store data from NetSapiens APIs and subscription-based events.
- Develop secure internal and external REST APIs.
- Design and maintain SQL Server data models for operational and reporting workloads.
- Work wi...