.Net Core Developer - API Gateway Exp

Position: .Net Core Developer - API Gateway ExpLocation: Houston, TX – Hybrid ModelLong Term ContractWe 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 mustKey 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 automationDesired 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.