[HCM/HN/DN] Senior Fullstack Engineer (.NET & React)

What you'll do
Design and build scalable, high-performance applications using C#/.NET 8, React, TypeScript, EF Core, and PostgreSQL.
Develop robust REST APIs, business workflows, and multi-tenant solutions with a strong focus on performance, reliability, and data integrity.
Apply Clean Architecture and solid engineering principles to build maintainable, scalable software.
Build secure and reliable features, including authentication, authorization, transactional workflows, and idempotent APIs.
Develop modern, responsive frontend experiences using React and TypeScript.
Champion TDD and automated testing across unit, integration, and end-to-end levels.
Work closely with Product and Engineering teams to solve complex problems and deliver high-quality features from design through production.
Contribute to technical decisions, code reviews, and continuous improvement of engineering practices.
Who we're looking for
5+ years of hands-on experience with C# and .NET, with strong experience building production-grade REST APIs.
3+ years of experience with TypeScript and React, including React Hooks and modern state/data management.
Strong understanding of Clean Architecture, software design principles, and relational databases.
Solid experience with EF Core and PostgreSQL or SQL Server, including transactions and data integrity.
Strong testing mindset and hands-on experience with xUnit, NSubstitute, or Moq.
Good understanding of API security, including JWT, claims, CORS, and secure token handling.
Experience with Docker/Docker Compose and modern development practices.
Familiarity with Tailwind CSS, Zustand, or React Hook Form is a plus.
Experience with AWS, LLM/AI integration, or aged-care/healthcare products is a plus.
A strong sense of ownership, problem-solving ability, and the ability to work effectively in a collaborative engineering environment.
What we offer
Attractive and competitive performance-based compensation package.
Full gross salary during probation.
Generous 13-month salary and dedication bonus.
Comprehensive healthcare insurance package and annual health check-ups.
Flexible check-in time before 10:00 AM on weekdays.
2 days remote work per week.
12 annual leave days, 5 sick leave days, 11 public holidays as required by Vietnamese Labor Law, plus one extra day off for Christmas.
Opportunity to work on global projects, collaborate with international teams.
Daily breakfast, Happy Thursday gatherings to connect with colleagues.
Active sport clubs such as badminton, running, football, music clubs.
Teambuilding activities, annual company trips, and year end party.
Continuous learning opportunities through technical & soft skills training, English classes, and internal communities.
Financial assistance for important life events, including marriage, childbirth, and bereavement, ensuring support at every stage of life.