.Net Core Developer - API Gateway Exp

Location: Houston, TX – Hybrid Model Long Term Contract We are hiring an experienced .NET Core Developer with expertise in payment gateway and switch development. The role involves designing, developing, and optimizing high-performance payment processing systems with a focus on API-based integrations, and transaction processing for fintech platforms. 10 years of development experience in .NET Core / C# / ASP.NET Core with API Gateway must Key Responsibilities: Develop and maintain payment gateway & switch applications using .NET Core / C#. Build and optimize high-performance APIs, microservices, and transaction routing engines. Work with BA, Product, and Ops teams to translate requirements into technical solutions. Debug, troubleshoot, and resolve transaction failures, settlement/reconciliation issues. Participate in SIT, UAT, and production support for payment projects. Contribute to code reviews, best practices, and process automation Desired profile of the candidate: 10 years of development experience in .NET Core / C# / ASP.NET Core. Strong experience in payment systems, fintech, banking technology, or switch development. Hands-on expertise with transaction routing, host-to-host integrations. Proficiency in Web API, REST, microservices, SQL Server, Entity Framework, LINQ. Familiarity with cloud platforms (Azure / AWS) preferred. Knowledge of RBI/PCI-DSS standards, security & encryption in financial applications. Strong debugging, performance tuning, and problem-solving skills. #J-18808-Ljbffr RSA Tech