Onsite Hai Chau District, Da Nang or District 7, HCMC

• Responsible for developing and maintaining backend services using .NET 8 and ASP.NET Core.
• Focus on building clean, scalable RESTful APIs, working with databases, and optimizing system performance.
• Participate in deployment, monitoring, and troubleshooting of backend services, and collaborate with other teams to deliver stable and secure systems.

1. Core Knowledge

• Strong understanding of Object-Oriented Programming (OOP): classes, interfaces, abstract classes, inheritance, polymorphism, encapsulation.
• Ability to design and organize code following SOLID principles, clean code, and maintainable architecture.
• Knowledge of common backend design patterns: Repository, Dependency Injection, Factory, CQRS, ETC.

2. Algorithms & Optimization Mindset

• Solid understanding of basic data structures and algorithms: array, list, dictionary/map, tree, graph, queue, stack, hashing, ETC.
• Ability to analyze time and space complexity using Big-O notation.
• Capable of choosing appropriate solutions for real-world performance problems (e.g. large data paging, caching, batch processing).

3. Experience with .NET

• Experience working with .NET / .NET Core, preferably .NET 8.
• Proficient in C#, ASP.NET Core Web API.
• Familiar with Dependency Injection, Middleware pipeline, Configuration, and Logging in .NET.
• Experience with Entity Framework Core or similar ORM; understanding of migrations, tracking/no-tracking, transactions.
• Able to read, understand, and optimize database queries (SQL Server / PostgreSQL / MongoDB… depending on the system).

4. Development & Operations (DevOps)

• Understand basic CI/CD processes: build, test, containerize, deploy.
• Experience with Docker (writing Dockerfile for .NET services, building images, running containers).
• Able to configure and read service logs in Linux environments (journalctl, docker logs, ETC.).
• Basic knowledge of reverse proxy / API gateway (e.g. Nginx), SSL/TLS, domain configuration.
• Able to monitor and troubleshoot backend services (timeout, memory leak, high CPU, connection pool issues, ETC.).
• Experience deploying backend services to production environments (on-premise servers or cloud platforms).

5. RESTful API

• Strong understanding of RESTful architecture and how to design clear, stateless, scalable APIs.
• Mastery of HTTP methods (GET, POST, PUT, PATCH, DELETE…) and correct usage.
• Clear understanding of end-to-end request flow:
  client request → routing/controller → validation → business/service layer → repository/data access → database/external service → response
  (with proper status codes such as 200, 201, 400, 401, 403, 404, 500…).
• Experience designing request/response DTOs, pagination, filtering, sorting.
• Basic knowledge of authentication/authorization (JWT, API key, header validation).
• Experience writing and reading API documentation (Swagger / OpenAPI).

6.  Additional Must-Have Skills

• Version control with Git (branching strategy, pull requests, code review).
• Strong debugging skills and issue tracing through logs.
• Basic API security mindset: input validation, rate limiting, avoiding exposing sensitive information in logs.
• Comfortable reading technical documents in English (no verbal requirement).

7. AI Knowledge (Basic knowledge of AI is required; hands-on experience is not mandatory)

• Experience with Python, including basic syntax, virtual environments (venv/conda), and package management (pip).
• Familiar with common AI/ML tools and frameworks such as TensorFlow, PyTorch, OpenAI API, Hugging Face Transformers, or LangChain.
• Ability to deploy or integrate AI services or models into .NET systems via REST or gRPC.
• Basic understanding of Natural Language Processing (NLP), Computer Vision, and Machine Learning pipelines.
• Experience with intelligent APIs, including recommendation, classification, semantic search, or data analysis.

• Monthly salary: Fixed (not based on KPI)
• Social, Health, and Unemployment Insurance (SHUI): In accordance with the labor law
• Annual leave: In compliance with the Labor Code
• Bonus additional annual leave based on seniority
• 13th-month salary: Based on actual annual performance
• Working hours: Monday to Friday, 8:30 AM – 5:30 PM