Senior .NET Backend Engineer for Enterprise ITSM APIs

morgan mckinley pte. ltd.; Singapore; On-site; SGD 120,000 - 180,000; Full time

Job summary

Morgan McKinley Pte. Ltd. is seeking a Senior .NET Developer to design, build, and maintain RESTful APIs and backend services as part of an enterprise ITSM and automation ecosystem.

You will work with PostgreSQL via EF/Npgsql and ensure secure authentication with JWT, LDAP/AD, and Windows auth. The role collaborates with frontend teams and supports containerized deployments. The ideal candidate has 5+ years of backend experience in C#/.NET, strong API design skills, and proficiency with Docker

Qualifications

• Bachelor's Degree in Computer Science, Computer Engineering or equivalent.
• 5+ years of professional backend experience in C# / .NET (ASP.NETCore preferred).
• Strong understanding of REST API design, authentication/authorization patterns, and secure coding practices.
• Experience with relational databases (PostgreSQL, SQL Server, or similar) and ORMs (Entity Framework or equivalent).
• Familiarity with containerization (Docker) and CI/CD pipelines.
• Experience with version control (Git) and collaborative development workflows.
• Strong debugging, troubleshooting, and problem-solving skills.
• Clear written and verbal communication, with the ability to work cross-functionally with frontend, QA, and infrastructure teams.

Responsibilities

• Design, build, and maintain RESTful APIs and backend services using .NET 8 /ASP.NETCore.
• Work with PostgreSQL (via Npgsql/Entity Framework) to design schemas, write efficient queries, and manage data access layers.
• Implement and maintain authentication/authorization flows, including JWT bearer auth, Windows/Negotiate authentication, and LDAP/Active Directory integration.
• Integrate backend services with third-party and enterprise systems (e.g., ServiceNow-style ITSM platforms, directory services, internal data APIs).
• Collaborate with frontend engineers to design clean API contracts consumed by React/TypeScript applications.
• Containerize services with Docker and support CI/CD pipelines (Jenkins, GitLab CI).
• Write unit and integration tests, participate in code reviews, and uphold code quality standards (e.g., SonarQube).
• Troubleshoot and resolve production issues across the stack, with structured logging (log4net) and observability practices.
• Contribute to architecture decisions for new services and the evolution of existing ones.

Skills

C# / .NET

REST APIs

JWT / LDAP / AD

CI / CD

SQL / PostgreSQL

Git / collaboration

Debugging / troubleshooting

Frontend collaboration

Full-stack (React/TS)

AI/LLM tooling

Education

Bachelor's Degree in CS/CE or equivalent

Tools

Docker

Entity Framework

Npgsql

PostgreSQL

Git

Job description

Morgan McKinley Pte. Ltd. is seeking a Senior .NET Developer to design, build, and maintain RESTful APIs and backend services as part of an enterprise ITSM and automation ecosystem.

You will work with PostgreSQL via EF/Npgsql and ensure secure authentication with JWT, LDAP/AD, and Windows auth. The role collaborates with frontend teams and supports containerized deployments. The ideal candidate has 5+ years of backend experience in C#/.NET, strong API design skills, and proficiency with Docker