Lead.Net Core Developer

We are hiring an experienced Lead Backend .NET Core Developer to join a large-scale modernization initiative for a global banking client. In this role, you will act as a technical lead while remaining hands-on with development. Youll be responsible for building and maintaining secure, scalable RESTful APIs, collaborating with cross-functional teams, mentoring junior developers, and contributing to CI/CD and configuration practices. This is a high-impact role for someone who combines strong backend expertise with leadership maturity and a delivery mindset.Work Model : Hybrid (3 days/week from office)Client : US-based global banking clientNotice Period : Immediate to 21 DaysKey Responsibilities : - Lead backend/API development efforts, including sprint planning, task allocation, and pull request reviews.- Independently design and develop RESTful APIs using .NET Core and C#, ensuring performance, security, and scalability.- Collaborate closely with frontend developers to ensure seamless integration and consistent API behavior.- Write clean, efficient, and testable code while ensuring codebase maintainability and readability.- Support configuration management through appsettings.json, dependency injection, and environment-based setups.- Conduct integration testing and write unit tests using xUnit/NUnit and Moq.- Troubleshoot production issues, optimize queries, and ensure stable releases with Git-based workflows.- Apply relevant design patterns (Repository, Factory, Dependency Injection) to structure code for extensibility and maintainability.- Participate in discussions on implementation trade-offs, performance decisions, and error-handling strategies.Technical Skills & Expertise : : - Strong experience in .NET Core backend development including routing, middleware configuration, and controller lifecycle management.- Expertise in C#, especially async/await, LINQ, generics, and performance-oriented code refactoring.- Experience designing and securing REST APIs, with understanding of JWT-based authentication, versioning strategies, and error handling patterns.- Hands-on experience with SQL Server, including complex queries, stored procedures, indexing, null handling, and execution plans.- Proficient in Entity Framework Core, with knowledge of model creation, migrations, eager/lazy loading, and N+1 query mitigation.- Daily use of Git for branching, PR management, and resolving merge conflicts. Familiar with GitFlow or trunk-based workflows.- Ability to manage environment configurations via appsettings.json, secrets handling, and dependency injection.- Familiarity with frontend integration, including Swagger/OpenAPI documentation, CORS, HTTP verbs, and debugging via browser dev tools.- Comfortable writing unit and integration tests using xUnit/NUnit and mocking frameworks like Moq.- Practical application of system design patterns such as Repository, Factory, and Dependency Injection.- Team leadership experience-allocating tasks, unblocking issues, mentoring junior developers, and coordinating deliverables.Nice-to-Have : - Knowledge of Task Parallel Library (TPL) and basic multithreading constructs like task chaining and parallel loops.- Comfortable with Tuple handling and deconstruction for cleaner multi-value returns.- Ability to containerize .NET Core applications using Docker and test locally; orchestration knowledge not mandatory.- Experience deploying APIs to cloud platforms such as Azure or AWS and working with managed DBs, blob storage, and messaging queues.- Familiarity with Swagger/OpenAPI for contract verification and API debugging.- Exposure to Windows Services or background job execution patterns.- Banking domain familiarity, including transactional systems, audit logs, or reconciliation workflows.- Experience using or triggering CI/CD pipelines via Azure DevOps or GitHub Actions (pipeline authoring not required). (ref:hirist.tech)