Senior Fullstack .NET Developer (ReactJS, C#, English)

Top 3 reasons to join us

• Enjoy benefits such as a 13th-month salary
• Shape how TOM is delivered to customers
• Work hands-on across discovery, analysis, delivery

Job description

Office location: Ho Chi Minh City (District 1) | Company HQ: Melbourne, Australia

Employment Type: Full-time

Your Role

You will join as a Senior .NET Full-Stack Developer with the opportunity to grow into a Technical Lead role. Initially, your main responsibility is hands-on coding, building high-quality features, and contributing to the architecture of TOM software products. Over time, as you demonstrate leadership and technical ownership, you will be mentored and supported to step into a lead position where other developers will work around you.

This role is ideal for someone who is strong technically, eager to take on more responsibility, and ready to grow into a leadership track while still being hands-on.

Key Responsibilities

Development & Delivery (Primary)

• Design, build, and maintain features for:
  • TOM ERP – our core system for business operations.
  • TOM Platform – SaaS solution for ordering, invoicing, and delivery tracking.
• Write clean, maintainable, and testable code in .NET (C#) and ReactJS (TypeScript).
• Collaborate with BA/PO and QA to refine requirements and deliver high-quality features on time.
• Participate in code reviews and contribute to improving coding standards and practices.
• Support integrations with ERPs and third-party systems.

Technical Growth to Leadership

• Gradually take ownership of technical design decisions and system architecture.
• Learn to guide and mentor junior developers.
• Contribute to discussions on scalability, performance, and best practices.
• Get involved in CI/CD, Azure DevOps pipelines, and cloud deployment strategies.

Support & Collaboration

• Work closely with the Australian product and customer success teams to understand requirements and priorities.
• Help troubleshoot and resolve complex issues in collaboration with QA and BA/PO.
• Support production issue investigations when escalated.

Your skills and experience

What We’re Looking For

- English: Good in reading and writing documents

- Business domain: ERP systems, business operation systems, workflow-heavy SaaS

- 5+ years of experience with Microsoft technologies:

- Backend: ASP.NET MVC (Framework and Core), C#, Web API, Entity Framework

- Database: SQL Server, MongoDB

- Frontend: ReactJS (TypeScript), HTML5, CSS3, Bootstrap/Tailwind

- Solid understanding of system architecture, data modeling, and design patterns.

- Experience with Azure services like SQL Azure, Web App Services, Service Bus, Redis Cache, Azure Functions.

- Familiar with CI/CD using Azure DevOps or similar tools.

- Strong problem-solving skills and proactive attitude.

- A proactive, adaptable attitude suitable for a startup environment.

Success in 3–6 Months Looks Like

• Delivering high-quality features independently with minimal supervision.
• Demonstrating strong ownership of assigned modules and services.
• Building trust with the Technical Lead/Architect and showing readiness for leadership responsibilities.
• Supporting the team in resolving complex technical issues and improving coding standards.

To Apply:

Send your CV with subject: 

[Senior .NET] Your-full-name – Mobile Number – HCMC (Onsite)

Why you'll love working here

About Tomsoft

Secomm is an eCommerce & Software Solution Provider agency based in Saigon since 2014. Our technologies and platforms are wide-ranged from PHP, Javascript, .NET, Magento, Shopify, Power Platform, etc... We have clients from Australia, Vietnam, Singapore, HongKong, and our market is expanding.

Tomsoft, a long term Secomm’s partner, is a growing Australian software company focused on making ERP systems accessible for small and medium-sized businesses. Our main product, TOM, is a SaaS platform that helps wholesale, distribution, and manufacturing companies manage their operations efficiently. TOM offers features like order tracking, financial integration, and real-time analytics, similar to big ERP systems like Oracle NetSuite or Microsoft Dynamics, but in a simpler and more affordable package.

Why Join Us?

- Shape how TOM is delivered to customers in Australia while growing a high-performing Vietnam team alongside our software product development team.

- Work hands-on across discovery, analysis, delivery, and customer success.

- Gain international exposure with opportunities to work in Australia or the U.S.

- Enjoy benefits such as a 13th-month salary, performance bonuses, team-building events, and professional training.