Salary
$70k – $117k per year (gross)
Location
In office (Singapore)
Seniority
Senior · 8+ years exp
Employment
Contractor
First seen by Alion on Sep 25, 2026.
Overview
Company
Impact
Profile match
Optimum Solutions is an IT services and outsourcing company headquartered in Singapore that provides software engineering, application development and maintenance, data and analytics, cloud and infrastructure, testing and global capability centre services. Founded in 1997, it reports more than 4,000 employees across offices and delivery centres in nine countries, including India and China, and supplies contract IT staff to banks and global technology clients. Its Singapore listings cover Java and .NET developers, DevOps and GenAI engineers, business analysts, scrum masters, UX designers, compliance associates and contract privacy support and AI video roles.
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.
Skills
Kubernetes, .NET, Design Patterns, AWS, OAuth, JavaScript, Software Architecture, Full Stack Development, ASP.NET MVC, .NET Core, .Net Framework, Microservices Design, ASP.NET, SQL Server, Event-Driven Architecture (EDA), Docker, C#, API, Backend Development, AWS Lambda
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