Teoman C.

Need a C# / ASP.NET Core developer who can take your web app to production, payments included? I build and maintain live ASP.NET Core platforms with paying users, Stripe and iyzico payments and real-time features, and my clients come back for the next phase. Top Rated, 100% Job Success, 5-star reviews on every completed contract. Recent work: ★ Eysstalent — Talent discovery and casting platform (client project, in production): Built with ASP.NET Core MVC (.NET 8), EF Core, SQL Server, and Identity. Dual payment integration (iyzico Checkout Form + Stripe Checkout) with webhook idempotency. SignalR-powered real-time pinboard, video upload service, full admin panel, DKIM/SPF/DMARC email authentication, and Google OAuth. ★ SelfAI — AI image generation platform with fal.ai integration: Strict SOLID layering (Controllers → Orchestrator → Generators → HTTP Client), Flux LoRA training, character training pipelines, and secure credential management via user secrets. What I can help you with: - ASP.NET Core MVC / Web API development (.NET 8 / .NET 9) - Stripe and iyzico integration with proper webhook handling and idempotency - Entity Framework Core: schema design, migrations, performance tuning - SignalR real-time features (chat, notifications, live updates) - ASP.NET Core Identity, role-based authorization, Google OAuth - SQL Server design and query optimization - Production deployment (SmarterASP, IIS) with security headers and CSP - Background services (IHostedService) and scheduled jobs - Email systems with DKIM/SPF/DMARC authentication How I work: I treat your codebase like it will be read by another developer in two years — because it will be. I follow SOLID principles, separate concerns properly, and write code that scales beyond the MVP. I communicate in clear English, give honest time estimates, and tell you when something is a bad idea before I build it. Tech stack: C# · ASP.NET Core MVC · .NET 8/9 · Entity Framework Core · SQL Server · SignalR · Identity · Stripe · iyzico · MailKit · Google OAuth · Razor · Bootstrap · JavaScript · Git If you're building a SaaS, a marketplace, an internal tool, or anything that needs a solid .NET backend — send me a message describing what you want to build. I'll review it and tell you honestly whether I'm the right fit and what the realistic scope looks like.