Senior Software Developer (Full-stack: C# .NET + React)

Description: Develop all three web applications (BPP, iMaster, iGarantee) according to specifications and the Common Design standard.
Develop the backend with C#.NET (Web API), business logic, and shared services.
Develop the frontend with React following the UX/UI design and display standards (field format, message box, sorting, pagination, etc.).
Connect to and manage the Microsoft SQL Server database; write queries/stored procedures and improve performance (performance tuning).
Write unit tests, perform code reviews, and maintain code quality per standards (coding standard, naming convention, security).
Fix bugs from SIT/UAT testing and maintain the system after delivery.
Apply AI coding assistants (e.g., GitHub Copilot, Cursor, Claude) to help develop, review, debug, and refactor code, and analyze logs/issues to find root causes and fix them faster.
Collaborate on technical design with SA/Tech Lead and mentor junior developers.
Support deployment through CI/CD processes and prepare related technical documentation.
Required.
Qualifications.
Bachelor's degree or higher in Computer Engineering, Computer Science, Information Technology, or a related field.
At least 5 years of experience in web application development.
Proficiency in C# and.NET (.NET Core /.NET 6/8), RESTful Web API development, and Entity Framework.
Proficiency in React (function components, hooks, state management such as Redux/Context), JavaScript/TypeScript, HTML5, CSS3, and responsive design.
Experience with Microsoft SQL Server databases and proficiency in T-SQL/stored procedures.
Use of Git version control and understanding of team development processes (branching, pull request, code review).
Understanding of REST API, authentication/authorization (JWT/OAuth), and system integration.
Preferred.
Qualifications.
Experience with procurement systems (e-Procurement) or government/state enterprise systems.
Experience with microservices, Docker/Kubernetes, and CI/CD (Azure DevOps, GitHub Actions, Jenkins).
Knowledge of cloud (Azure/AWS) and performance/security optimization (OWASP).
Experience with the Waterfall (SDLC) methodology and milestone-based delivery, as well as Agile/Scrum.
Technical Skills & Tools.
Backend: C#,.NET Core /.NET 6/8, ASP.NET Web API, Entity Framework, LINQ.
Frontend: React, JavaScript/TypeScript, HTML5, CSS3, Redux/Context, Responsive UI.
Database: Microsoft SQL Server, T-SQL, Query Optimization.
DevOps/Tools: Git, CI/CD, Docker, Postman/Swagger, Unit Testing.
AI Skills.
As the system is complex with many issues to resolve, developers who use AI as a tool to increase development speed and quality and to solve problems are preferred.
Use AI coding assistants (GitHub Copilot, Cursor, Claude, etc.) to enhance development efficiency and quality.
Use AI to help debug, refactor, write unit tests, and perform preliminary code review, while always verifying correctness yourself.
Prompt engineering skills for development, analyzing errors/logs, and quickly identifying root causes.
Understand the limitations and security/licensing risks of AI-generated code and use it appropriately per project standards.
(Preferred) Experience integrating/developing features using AI APIs (e.g., OpenAI / Azure OpenAI) or RAG/LLM integration.
Soft Skills.
Responsibility and attention to code quality.
Teamwork and strong technical communication.
Continuous learning of new technologies.
Problem-solving and prioritization.
Ability to guide and mentor junior.
Job skills required: .NET, C#
Job skills preferred: Microsoft SQL Server, Javascript, Procurement, TypeScript, Kubernetes