Senior .NET Developer

Optimum SolutionsSingaporemycareersfuturepublished 09/25/2026
Must-have:JavaScriptJavaC#HTMLCSSAWSDockerCloudFrontendBackendMicroservicesAISecurity

Key Responsibilities

Backend Development:

  • Design, develop, and maintain microservices architecture using .NET Core,.NET 8 and Java.
  • Implement event-driven architecture to enable seamless communicationbetween microservices.
  • Utilize Entity Framework (EF) for efficient database interactions andmanagement.
  • Containerize applications using Docker for scalability and deploymentflexibility.
  • Apply Domain-Driven Design (DDD) principles to ensure clean and modularcode architecture.
  • Implement OAuth for secure authentication and authorization.
  • Develop and enforce security best practices to safeguard sensitive dataand systems.
  • Utilize AWS services such as S3, Lambda, API Gateway, RDS, etc., forbackend development.
  • Develop RESTful APIs endpoints to facilitate communication between thefrontend and backend.
  • Apply Spec Driven Development (SDD) concepts in development of code viaClaude AI technologies.
  • Support and maintain legacy .NET Framework (4.x) applications, includingmigration pathways to modern .NET where applicable.
  • Manage application hosting and deployment on IIS and Windows Server environments, including environment-specific configuration management using config transformations.

Frontend Development:

  • Develop responsive and user-friendly web applications using ASP.NET including WebForm applications.
  • Generate and review unit tests using generative AI to ensure code quality and reliability.
  • Create reusable UI components and maintain a consistent design usingStorybook.
  • Collaborate closely with UX/UI designers to implement intuitive andvisually appealing interfaces.
  • Troubleshoot and debug issues across the stack, ensuring smooth application operation.
  • Optimize application performance and scalability for a seamless user experience.

Requirements:

  • Proven professional experience working on .NET Core stack.
  • Strong proficiency in .NET Core, .NET 8, C#, Java and related backendtechnologies.
  • Experience building microservices architecture and implementingevent-driven design patterns.
  • Proficiency in Entity Framework (EF) for database management.
  • Familiarity with Docker and containerization principles.
  • Knowledge of Domain-Driven Design (DDD) principles and their applicationin backend development.
  • Experience implementing OAuth for authentication and authorization.
  • Understanding of security best practices and their application in backenddevelopment.
  • Hands-on experience with AWS services such as S3, Lambda, API Gateway,RDS, etc.
  • Proficiency in frontend technologies such as HTML, CSS, and JavaScript,ASP.NET and WebForms.
  • Experience writing unit tests and maintaining a design system with Storybook.
  • Strong problem-solving skills and attention to detail.
  • Excellent communication and collaboration skills.
  • Knowledge and experience in utilizing generative AI to develop andreview codes via Spec Driven Development (SDD).
  • Hands-on experience with legacy .NET Framework (4.x) applications including maintenance and incremental modernisation.
  • Experience with Oracle databases, including query optimisation and integration with .NET applications.
  • Proficiency in deploying and configuring applications on IIS and Windows Server, with working knowledge of Web.config transformations for environment-specific deployments.
  • Hands-on experience with Java Quarkus framework, including building and deploying cloud-native microservices, with working knowledge of OpenTelemetry for distributed tracing and observability.