Senior.NET DeveloperLocation – Jersey City NJ, Charlotte NC, Addison TXExperience – 8 to 10 years of experienceJob Description – Senior.NET DeveloperOverviewWe are looking for a highly skilled Senior.NET Developer to support a major application modernization program involving the migration of existing systems from.NET Framework 4.8 to.NET Core 8 and a database transition from SQL Server to CockroachDB. The ideal candidate will have hands-on experience modernizing enterprise applications, refactoring legacy components, and implementing scalable services.Key ResponsibilitiesLead the modernization of applications from .NET Framework 4.8 to.NET Core 8, ensuring improved performance, security, and maintainability.Design and develop RESTful Web APIs using.NET Core 8Participate in and contribute to the migration of SQL Server workloads to CockroachDB, including schema transformation, data migration, and performance tuning.Refactor legacy code, introduce best practices, and drive engineering standards across the team.Collaborate with architects, database engineers, and DevOps teams to ensure seamless modernization.Troubleshoot production and lower-environment issues related to APIs, services, and database integrations.Participate in Agile ceremonies, code reviews, and technical discussions.Document technical workflows, architectural components, and migration steps.Must Have SkillsStrong experience with.NET Framework 4.8Hands-on expertise in .NET Core 6/7/8 (preferably.NET 8)Solid experience with Web API developmentStrong command of SQL Server, including stored procedures, indexing, query tuningExperience upgrading, refactoring, or re-engineering legacy .NET applicationsGood to HaveExperience with CockroachDB or any distributed SQLMessaging experience with Kafka or MQ (IBM MQ, RabbitMQ, ActiveMQ etc.