Senior .NET Developer
About this job
Senior .NET Developer
12 months (renewable)
About the Role
We're looking for a Senior.NET 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., 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
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/TypeScript 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
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The employer lists 8 000 – 11 300 $ for this role at U3 INFOTECH PTE. LTD. in Singapore. For comparison, the local market median is about 5 657 $ based on 26 844 similar offers.
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