Senior .NET Developer

March 25, 2026
Open
Open
Location
Vietnam
Occupation
Full-time
Experience level
Senior
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Job Summary

Vị trí này thuộc công ty Bestarion, làm việc tại Việt Nam với hợp đồng toàn thời gian. Ứng viên sẽ phụ trách phát triển full-stack một ứng dụng thuế quan trọng cho thị trường Mỹ, sử dụng công nghệ Angular, C#, .NET Core, AWS, Kubernetes. Có hai lựa chọn: onsite Mỹ ít nhất 1 năm hoặc công tác Mỹ, còn lại làm tại Việt Nam. Lương, bảo hiểm, thưởng hấp dẫn, hỗ trợ di chuyển cho phương án onsite Mỹ.

Yêu cầu tối thiểu trên 5 năm kinh nghiệm lập trình, giỏi về full-stack, chuyên sâu Angular, .NET Core; hiểu sâu về RESTful API, Azure DevOps, Kubernetes, GitHubJira. Ưu tiên ứng viên có khả năng mentorship, tư duy chuyên nghiệp, hoặc kinh nghiệm từng triển khai các giải pháp cloud.

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About Bestarion: Leading Outsourcing Company in Vietnam

Bestarion is an IT outsourcing service provider specializing in the healthcare supply chain and financial services for the last 20+ years.

In 2019, we expanded to offer accounting outsourcing solutions to US accounting firms. Over 6 years, our accounting & bookkeeping segment doubled in size, and we aim to grow this sector even more. Our Accounting outsourcing services include bookkeeping, payroll and tax preparation, seamlessly integrating with clients’ teams to handle essential tasks.

We strive to deliver exceptional value to our clients by offering “Better for Less”. Our goal is to provide cost-effective solutions without compromising the quality of our services.

About Bestarion: Leading Outsourcing Company in Vietnam · Vietnam (Remote)

Bestarion has been providing innovative outsourcing services and business solutions to many successful clients in more than 15 countries for over 15 years now. Our wide range of services includes Big Data - Data Analytics, Securities Trading Solutions, Surround Core Banking Solutions, E-commerce/Social Network App Development, and Web App Development. We focus on today’s trends of Big Data, Cloud Computing, Social Networks, Mobility, and the Internet of Things.

Work Location & Project

Option 1: Work on-site in the USA for at least 1 year. After that, you will continue working on-site at Bestarion’s office in Vietnam.

Option 2: Work on-site at Bestarion’s office in Vietnam and take business trips to the USA (around 4 trips per year, lasting 1-2 weeks each).

Project: These Software Engineers will be at the forefront of transforming a critical US Tax Application. This application will be used by millions of consumers across the country, making a significant impact. This work involves cutting-edge technologies and the strategic use of AI, revolutionizing how tax processes are handled in the US.

Key Responsibilities

  • Full-Stack Development: Lead the design, development, and implementation of complex features and functionalities for both front-end and back-end components of our applications.
  • Front-End Expertise: Architect and develop responsive, intuitive, and high-performance user interfaces using Angular, ensuring an exceptional user experience.
  • Back-End Development: Design and develop highly scalable, secure, and efficient RESTful APIs and services using C# and .NET (or later) on the .NET Core Framework.
  • Code Quality & Best Practices: Write clean, maintainable, and well-documented code. Conduct thorough code reviews, ensuring adherence to coding standards, design patterns, and best practices.
  • Testing & Quality Assurance: Develop comprehensive Unit Tests for both front-end and back-end code to ensure reliability and correctness. Participate in and support Usability Testing and Operational Testing phases to validate application performance and user experience.
  • Cloud & DevOps: Deploy, manage, and optimize applications within AWS environments, leveraging containerization technologies like Kubernetes. Collaborate with DevOps teams on CI/CD pipelines managed via Azure DevOps and GitHub for backend repositories.
  • Problem Solving & Troubleshooting: Diagnose and resolve complex technical issues, performance bottlenecks, and bugs across the full stack.
  • Collaboration & Mentorship: Work closely with product managers, UX/UI designers, and other engineers in an agile environment. Mentor junior engineers, share knowledge, and promote a culture of continuous learning.
  • Project Tracking: Utilize Atlassian Jira for effective task tracking, sprint management, and project communication.

Job Qualifications

  • Bachelor’s degree in Computer Science, Engineering, or a related field, or equivalent practical experience.
  • Greater than 5 years of progressive experience in software development, with a significant focus on full-stack development.
  • Strong expertise in Front-End development with Angular.
  • Extensive experience with C# and the .NET Core Framework, particularly .NET 8 (or later).
  • Proven experience designing and implementing RESTful API services.
  • Deep experience with Visual Studio for both .NET and Angular development.
  • Experience with version control systems, specifically GitHub, and familiarity with Azure DevOps for CI/CD processes.
  • Hands-on experience with cloud platforms, particularly AWS, and container orchestration using Kubernetes.
  • Demonstrated experience writing comprehensive Unit Tests.
  • Familiarity with Usability Testing and Operational Testing methodologies. Proficiency in using Atlassian Jira for project management and issue tracking.
  • Solid understanding of software design principles, data structures, algorithms, and design patterns.

Define Yourself at Bestarion with Attractive Benefits

  • The company will fully cover all travel and relocation expenses related to the U.S. assignment (for onsite US option).
  • Attractive salary and benefits (13th salary, distinguished employee of the quarter and year, seniority award…)
  • Performance appraisal twice a year.
  • Healthcare and accident insurance.
  • 12 days off per year.
  • Provided laptop and monitor.
  • Various training on best practices and soft skills.
  • Team Building activities every summer, company trip, big annual year-end party every year, etc.
  • Fitness & sports activities: football, tennis, table tennis, badminton…
  • Commitment to community development: charity every quarter, blood donation, public seminars, career orientation talks…
  • Support for personal loans such as home loans, vehicle loans, tuition fees…

Location: Vietnam

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Bestarion
Bestarion is a provider of software development outsourcing and business process outsourcing (BPO) services. We have helped non-IT organizations and software product companies improve business performance and quickly acquire new customers. Bestarion is a subsidiary company of Larion and has provided software development/consultation services specializing in the healthcare supply chain and financial services for the last 10+ years. Our services cover data entry, bookkeeping, payroll, and tax preparation, seamlessly integrating with clients' teams to handle essential tasks. We enable high-performance businesses to save costs, increase efficiency, and enhance productivity by offloading time-consuming responsibilities. Our commitment to building long-term partnerships helps our clients focus on growth and success
HQ Location
Company size
101-200
Founded in
Industry
Outsourcing and Offshoring Consulting
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