Backend .NET Developer for AI Platform

We are looking for a senior-level Backend .NET Developer to help scale and maintain the backend services powering SEdgeOS—our multi-tenant, AI-powered property management platform for hospitality and short-term rental operators. A critical part of this role involves optimizing data logic and managing real-time two-way API synchronization with global OTA channels. What You'll Do: • Core Backend Engineering: Design and build robust backend services and APIs across core enterprise modules (bookings, availability, rates, payments, invoicing, owner statements, reporting). • OTA Integrations: Build and maintain live OTA/channel integrations via Channex (ARI sync, booking webhooks, reconciliation, rate limits). • Database & Architecture: Design EF Core models, handle database migrations, and write highly optimized Azure SQL queries with strict, secure multi-tenant isolation. • Production Debugging: Diagnose and resolve complex performance, race conditions, concurrency, and data-integrity issues in a live environment. • Follow clean code principles and actively participate in the team's Git/GitHub PR workflow. Required Technical Skills: • Strong C#/.NET expertise (.NET 6+ required; .NET 8/10 preferred). • Deep experience with Entity Framework Core (EF Core) and Azure SQL optimization. • Proven track record building enterprise REST APIs and handling complex third-party integrations (webhooks, tokens, rate limits, queues). • Solid understanding of multi-tenant architecture and cloud deployment (Azure App Service, Storage). • Strong Git/GitHub version control hygiene. Nice to Have: • Experience with Blazor Server. • Prior experience in the hospitality tech, property management system (PMS), or OTA/Channel Manager space. • Experience managing asynchronous background jobs or CI/CD pipelines. Project Type: Ongoing project Commitment: Part-time or Full-time hours (Flexible)