Senior Fullstack Developer (.NET)

About Trustify Technology

Trustify Technology is a fast-growing software engineering and digital transformation company providing AI-driven software development, verification & validation, and automation solutions for global clients across the US, UK/EU, Japan, and Singapore.

Trustify aims to be the top-tier technology outsourcing partner from Vietnam, combining human expertise with AI power to deliver high-quality, cost-effective solutions.

Key Responsibilities

• Independently maintain, debug, and enhance complex existing web systems.

• Lead investigation of production issues through log analysis, request tracing, and network/browser debugging.

• Design, develop, and optimize REST APIs and backend business logic.

• Actively participate in code reviews and ensure best practices in Git workflows.

• Ensure high-quality delivery across UI behavior, responsiveness, and cross-browser compatibility.

• Take ownership of assigned modules and mentor junior developers when needed. 

Requirements

• 5+ years of experience with C# + .NET Core.

• Strong SQL skills (query writing + optimization).

• Understanding of REST API design patterns.

• Ability to read logs, trace issues, and debug production problems.

• Proven ability to debug production issues independently.

• Hands-on experience with AWS or Azure.

• English: Working-level speaking/listening and fluent reading/writing

Nice to have

• Experience with JavaScript/TypeScript fundamentals.

• Experience with Ember.js or transferable skills from Angular.

• Ability to debug browser issues, analyze network traces, and work with responsive/cross-browser UIs.

• Experience working with Camera/WiFi systems is a plus. 

Benefits

• Flexible working hours
• Healthcare: Annual health check-up, Premium Health Insurance.
• 12 annual leaves + holidays.
• 13th-month salary.
• Bonus review bi-annually based on performance.  
• Bonus for excellent project performance.
• Year End Party (YEP), company trip, happy hours, team building activities.
• Job-related training courses & certification support (e.g., Agile/Scrum Master).
• Marriage gift, sick leave support, funeral/maternity support.
• Lunar New Year gifts.
• Working devices provided.