Backend Engineer

We are looking for a Senior Backend Engineer with extensive experience in the healthcare domain to join our application modernization team. This role is focused on re-architecting and migrating a mission-critical legacy enterprise application to a modern .NET ecosystem. You will be responsible for building high-performance, secure, and scalable server-side logic that interfaces with existing SQL databases while adhering to strict healthcare regulatory standards.

• Legacy Logic Transformation:
  Analyze and translate complex business rules from legacy source code into clean, maintainable, and testable .NET services.
• High-Performance API Development:
  Design, build, and maintain robust RESTful APIs using .NET 6/8+, ensuring low-latency response times for Angular front-end consumers.
• Database Engineering:
  Optimize existing SQL Server structures. You will be responsible for refactoring legacy "record-based" data access into efficient set-based operations using Entity Framework Core and Dapper.
• Healthcare Compliance:
  Architect data access layers that strictly enforce HIPAA compliance, including row-level security, data masking, and comprehensive audit logging.
• Integration & Messaging:
  Implement asynchronous processing and inter-service communication using message brokers (e.g., Azure Service Bus, Rabbit
  
  MQ) where applicable.
• Quality Assurance:
  Lead the implementation of Test-Driven Development (TDD) practices, ensuring high code coverage via unit and integration tests.

• Core Stack: 7+ years of deep expertise in C# and .NET Core / .NET 5+ .
• Database Mastery:
  Expert-level SQL Server skills (T-SQL, stored procedures, execution plan analysis, and performance tuning).
• ORM:
  Advanced experience with Entity Framework Core (including interceptors and performance optimization).
• Architecture:
  Strong mastery of Web API, Microservices, and Clean Architecture (Onion/Hexagonal).
• Security:
  Solid understanding of Identity Server, JWT, and OAuth2 implementation.

• Healthcare Domain:
  Minimum 5+ years of experience developing Healthcare IT products (EMR, PMS, Billing, or Clinical systems).
• Regulatory Knowledge:
  Practical experience implementing HIPAA, HITECH, and HL7/FHIR data standards.