Senior .NET Backend Engineer — API & Microservices

SSG; Pasig; On-site; PHP 900,000 - 1,500,000; Full time

Job summary

SSG is seeking a seasoned .NET Backend Developer to design, build, and maintain scalable server-side applications using C# and ASP.NET Core. You will develop RESTful APIs, implement data access with EF Core, and contribute to secure, robust microservices within a modern architecture.

You will also maintain CI/CD pipelines via Azure DevOps, apply SOLID principles, and perform unit testing with xUnit/NUnit. Strong knowledge of JWT/OAuth2/OpenID Connect and distributed systems is essential.

Qualifications

• Bachelor’s degree in Computer Science, Software Engineering, or related field.
• 5+ years of backend experience with C# and .NET/.NET Core.
• Strong ASP.NET Core, Web API, and EF Core expertise.
• Experience designing RESTful APIs with Swagger/OpenAPI.
• Solid OOP and SOLID principles.
• Experience with unit testing (xUnit/NUnit) and mocks.
• Knowledge of JWT, OAuth2, and OpenID Connect.
• CI/CD and DevOps familiarity (Azure DevOps).
• Understanding of microservices, messaging (RabbitMQ/Azure Service Bus).

Responsibilities

• Design, develop, and maintain scalable backend services using C# and .NET/.NET Core.
• Build and document RESTful APIs for internal and external use.
• Implement data access with Entity Framework Core.
• Write clean, maintainable, and testable code following best practices.
• Participate in code reviews and enforce coding standards.
• Troubleshoot and resolve production issues.
• Integrate with third-party APIs and services for reliability.
• Contribute to architecture and design of microservices.
• Maintain CI/CD pipelines and automate deployments.
• Stay updated with backend tech and propose improvements.

Skills

C#

ASP.NET Core

REST APIs

Entity Framework Core

Unit testing

Dependency injection

Middleware

JWT/OAuth2/OpenID

CI/CD

Azure DevOps

Education

Bachelor’s degree in CS/SE

Tools

Swagger/OpenAPI

Azure DevOps

Job description

SSG is seeking a seasoned .NET Backend Developer to design, build, and maintain scalable server-side applications using C# and ASP.NET Core. You will develop RESTful APIs, implement data access with EF Core, and contribute to secure, robust microservices within a modern architecture.

You will also maintain CI/CD pipelines via Azure DevOps, apply SOLID principles, and perform unit testing with xUnit/NUnit. Strong knowledge of JWT/OAuth2/OpenID Connect and distributed systems is essential.