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We are seeking a highly skilled Senior Full Stack Engineer to lead the technical implementation of a large-scale application modernization project. This role focuses on transitioning a legacy enterprise system into a high-performance web application. You will be responsible for developing robust .NET APIs and intuitive Angular front-ends, ensuring that the legacy SQL data logic is preserved while optimizing for modern performance standards and healthcare-grade security.
Job Responsibility:
Lead the migration of legacy business logic into modern, microservices-oriented or modular monolith .NET architectures
Architect and build responsive, accessible, and high-performance SPAs using Angular (latest versions), ensuring seamless integration with backend services
Design and implement secure, RESTful APIs using .NET 6/8+, emphasizing "Clean Architecture" principles
Work with existing SQL databases to optimize queries, design efficient schemas, and ensure data integrity during the transition from legacy access patterns to modern ORM (Entity Framework Core) patterns
Implement and maintain healthcare-specific security standards, including data encryption (at rest and in transit), HIPAA-compliant logging, and OAuth2/OpenID Connect authentication
Provide guidance to junior backend and frontend developers, performing rigorous code reviews to maintain high standards of code quality and maintainability
Requirements:
7+ years of experience in C# and .NET Core / .NET 6+
Deep understanding of ASP.NET Web API and Dependency Injection
5+ years of professional experience with Angular (TypeScript, RxJS, NgRx/Signals)
Strong proficiency in SQL Server, including advanced T-SQL, performance tuning, and indexing strategies
Proven experience with Design Patterns (Repository, Unit of Work, Factory) and SOLID principles
Experience with unit testing frameworks such as xUnit/NUnit for backend and Jasmine/Karma or Jest for frontend
8+ Years of experience
Nice to have:
Minimum of 3 years working on Healthcare products, with a solid understanding of HIPAA regulations and PHI handling
Previous experience migrating applications from legacy environments (e.g., RPG, AS400-based systems, or WinForms) to the web
Familiarity with CI/CD pipelines (Azure DevOps or GitHub Actions) and containerization (Docker)