Dot Net Developer

Job description

We are looking for a skilled .NET Developer to build the Application Layer of a high-performance software solution running on Client/Edge devices (PC/Embedded).

Your primary role is to develop the System Logic using .NET 8 (or higher) to:

1. Orchestrate the application workflow (Start/Stop engines, handle events).
2. Integrate with Native C++ Libraries via Interop.
3. Manage Multi-threaded operations efficiently on Linux & Windows.
4. Communicate with the UI and handle basic Data Persistence.

RESPONSIBILITIES

• Core System Development (.NET 8+):
• Develop robust Console Applications / Background Services running on Windows and Linux using .NET 8+.
• Implement Multi-threading logic to handle simultaneous tasks (Data ingestion from Engine, UI updates, Logging) without freezing the application.
• Apply Asynchronous Programming (Async/Await) correctly to maximize system responsiveness.
• Ensure system stability: Implement "Watchdog" mechanisms, auto-recovery, and resource management (CPU/RAM).
• Native Integration (Interop):
• Use P/Invoke and Marshaling to call functions from existing Native Libraries (DLL/.so).
• Handle data conversion between Managed (.NET) and Unmanaged (C++) memory safely.
• UI Communication:
• Implement Real-time communication channels to push data to the Frontend UI.
• Work with SignalR (WebSockets), TCP/UDP Sockets, or IPC (Named Pipes/Unix Domain Sockets).
• Data Persistence (Experience Level):
• Implement local data storage using relational databases: SQLite.
• Use Entity Framework Core or Dapper to save logs and operational data (Deep database optimization is NOT required, just functional usage).

#R62465

Your skills and experience

KEY REQUIREMENTS (MUST HAVE)

A. Modern .NET & System Skills (Top Priority):

• Tech Stack: Proficiency in C# with a focus on .NET 8 or higher.
• Strong understanding of Asynchronous Programming: You must strictly distinguish between CPU-bound (Task.Run) and I/O-bound (await) operations.
• Multi-threading competence:
• Ability to work with Synchronization (Lock, Monitor, Semaphore, Mutex).
• Ability to debug Race Conditions and Deadlocks.
• System Knowledge: Understanding of Process lifecycle, Memory Management, and how Services/Daemons work on an OS level.

B. Integration & Environment:

• Interop: Experience integrating C++ libraries (Native DLLs) into C# applications (P/Invoke).
• OS: Comfortable deploying and debugging .NET applications on both Windows and Linux.

C. Database:

• Experience with SQLite: Know how to perform basic CRUD operations using EF Core or SQL Client.

4. NICE TO HAVE (BIG PLUS)

• Windows UI Development: Experience building Desktop UIs using C# (WPF, WinForms, or WinUI). 
• Elasticsearch / NoSQL: Hands-on experience with Elasticsearch (Index design, Query DSL) or MongoDB. 
• Docker: Experience writing Dockerfile and docker-compose to containerize .NET 8 applications.
• Azure Cloud: Familiarity with Azure IoT Hub or Data Synchronization.
• C++ Literacy: Ability to read C++ header files (.h) to understand data structures for mapping (Coding in C++ is NOT required).

Why you'll love working here

• Compensation & bonus: 13th & 14th salary, AIP bonus, Holidays, Tet, and Long year service …
• Social insurance, Health insurance, Unemployment insurance: by Social Insurance and Labor Law
• The regime of annual leave, company trip, and checkup examination
• Award for marriage, newborn
• We have AON insurance package for employee, spouse, and children every year
• You will be trained, learned & work with the best technical managers who help you improve various dev skills & career path
• You’ll love working in our dynamic environment employees, young & active
• We love sport activities, as marathon, football, swimming,...
• Working time: From Monday to Friday | 08:30-12:00 & 13:00-17.30