Motasim A.

Professional Summary With over 15 years of experience in the Microsoft ecosystem, I specialize in building scalable, high-performance backend systems. My expertise lies in transforming complex business requirements into robust technical architectures. I provide end-to-end development services, from designing ASP.NET Core Web APIs and managing SQLite, SQL Server, and PostgreSQL. Whether you need a marketplace platform, a fintech solution with complex payment integrations I deliver clean, maintainable code that scales. Core Expertise: • Backend: .NET 8.0, C#, ASP.NET Core, RESTful APIs • Database: SQL Server, SQLite, PostgreSQL • DevOps & Cloud: GitHub Actions • Specialized Integrations: Stripe API (PaymentIntents/SetupIntents), Twilio, Sparkpost, Notification Systems. • Blockchain: Solidity • Languages: C#, Python. Experience: • Marketplace Platforms: Designed and developed a student-to-instructor marketplace featuring automated notification systems and user matching. • Ride-Sharing & Fintech: Built a ride-sharing application with advanced payment logic using the Stripe API, handling complex fare captures and holds.