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Senior .NET Developer

Job in Singapore, Singapore
Listing for: u3 infotech pte. ltd.
Full Time position
Listed on 2026-10-15
Job specializations:
  • Software Development
    Backend Developer, .NET Developer
Salary/Wage Range or Industry Benchmark: 90000 - 150000 SGD Yearly SGD 90000.00 150000.00 YEAR
Job Description & How to Apply Below

Senior .NET Developer
12 months (renewable)

About the Role

We're looking for a  Developer to join the team building and maintaining our enterprise ITSM and platform automation ecosystem — a suite of ASP.NET Core APIs and services that integrate with directory services, service management tools, and internal data stores, backed by React-based front-end applications. You'll own backend services end-to-end, from design through deployment, and work closely with frontend and automation engineers to deliver reliable, secure, and well-tested systems.

Responsibilities:
  • Design, build, and maintain RESTful APIs and backend services using .NET 8 / ASP.NET Core
  • 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., Service Now-style ITSM platforms, directory services, internal data APIs)
  • Collaborate with frontend engineers to design clean API contracts consumed by React/Type Script applications
  • Containerize services with Docker and support CI/CD pipelines (Jenkins, Git Lab CI)
  • Write unit and integration tests, participate in code reviews, and uphold code quality standards (e.g., Sonar Qube)
  • 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
Requirements;
  • 5+ years of professional experience building backend services in C# / .NET (ASP.NET Core preferred)
  • Strong understanding of REST API design, authentication/authorization patterns, and secure coding practices
  • Experience working 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
Nice to Have (Advantages)
  • Full-stack development experience, comfort working across the stack with React/Type Script front ends, from API design to UI integration
  • AI/ML knowledge, familiarity with applying AI/LLM tooling to developer workflows, automation, or product features (e.g., integrating LLM APIs, prompt engineering, or AI-assisted development practices)
  • Automation experience with Python and/or Ansible Automation Platform (AAP), building or maintaining scripts, playbooks, or jobs for infrastructure automation, compliance checks, or operational tooling
Requirements:
  • Experience integrating enterprise systems with LDAP/Active Directory or similar identity providers
  • Exposure to hybrid environments where .NET services, Node/React front ends, and Python-based automation coexist and need to interoperate
  • A track record of improving reliability, security, or maintainability of backend systems in a production environment
Position Requirements
10+ Years work experience
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