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Senior Software Engineer – .NET (API & Middleware)

VS ONE WORLD (Pvt) Ltd   Colombo • Full-time

We are seeking a hands-on Senior Software Engineer (.NET) to design and build middleware systems that enable seamless integration between multiple platforms. This role is heavily focused on API-driven architecture and requires strong backend expertise, Microsoft stack experience, and the ability to contribute immediately in a fast-paced delivery environment.

Key Responsibilities :-

  • Design, develop, and maintain middleware services for system-to-system integration
  • Build and manage API-driven communication between applications and services
  • Ensure secure, reliable, and scalable backend implementations
  • Apply Clean Architecture principles to maintain code quality and scalability
  • Develop and optimize data access layers and database interactions
  • • Collaborate with cross-functional teams to support testing, issue resolution, and delivery
  • Contribute to ongoing system enhancements and migration initiatives
  • Deliver features within tight timelines with minimal onboarding support

Required Skills and Experience

Core Backend

  • Strong hands-on experience with .NET (at least 8 ) , C# and ASP.NET Core
  • Proven experience in building and integrating RESTful APIs

Architecture & Design

  • Solid understanding of Clean Architecture
  • Experience working with Microservices-based systems

Data Layer

  • Hands-on experience with Entity Framework and Dapper
  • Strong experience with MS SQL Server

Security 

  • Experience implementing Role-Based Access Control (RBAC)

Frontend

  • Hands-on experience with Blazor

DevOps & Tools

  • Experience with Azure DevOps for source control, CI/CD pipelines, and work item management

Key Expectations :-

  • Ability to contribute immediately with minimal ramp-up time
  • Strong alignment with the required technology stack
Job poster for Senior Software Engineer – .NET (API & Middleware)