Strong expertise in .NET Core / ASP.NET Core for building web APIs and backend services.

Proficiency in C# with a focus on clean, efficient, and scalable code.

Experience with relational databases such as PostgreSQL or SQL Server (writing complex queries, optimizing performance, designing schemas).

Strong understanding of RESTful API design and development.

Implementation of authentication and authorization using OAuth2, JWT, and AWS Cognito.

Experience with asynchronous processing and messaging systems (e.g., Kafka, RabbitMQ, AWS SNS/SQS).

Background in building distributed systems and event-driven architectures.

Fluent in English.

Preferred Skills

Familiarity with NoSQL databases (e.g., DynamoDB, MongoDB).

Hands-on experience with AWS services, particularly:

AWS Lambda (serverless functions).

AWS Cognito (authentication and user management).

AWS S3, API Gateway, and DynamoDB.

Familiarity with CI/CD pipelines and testing frameworks.

Mandarin language skills are a bonus.

Work Style

Agile and SCRUM methodologies for collaborative and efficient project delivery.

Excellent communication and teamwork skills.

Key Responsibilities

Design, develop, and maintain backend services and APIs.

Optimize database performance and design efficient data models.

Implement authentication, authorization, and security best practices.

Develop and maintain asynchronous processing and messaging systems.

Work closely with front-end and DevOps teams to integrate backend functionalities.

Debug, troubleshoot, and improve system performance and reliability.