Senior Software Engineer | Bilingual English/Mandarin

Title: Senior Software Engineer | Bilingual English/Mandarin Location: Phoenix, AZ

About Us

Marketech International Corporation USA (MICU) is the U.S. subsidiary of Marketech International Corp. (MIC), a global technology and engineering firm founded in 1988. We support semiconductor, cleanroom and high-tech facility projects with turnkey services that include cleanroom and MEP construction, utility and chemical supply systems, tool installation and ongoing maintenance.

Job Overview

Marketech International Corporation USA is seeking a bilingual Senior Software Engineer to lead full-stack development, legacy system modernization and business process automation. This role supports our internal business systems, including ERP applications, databases and third-party integrations, with a focus on performance, reliability and scalability. The engineer also helps shape technical architecture and mentors junior developers.

Key Responsibilities

Full-Stack Development & Modernization

• Design, build, test and maintain full-stack enterprise applications using C#/.NET, ASP.NET Core, React, TypeScript and JavaScript.
• Modernize legacy business applications and support ERP modules such as inventory, accounting and internal operations.
• Build scalable backend services, cloud-based solutions and automated business workflows.

APIs, Databases & Performance

• Develop and integrate RESTful APIs connecting internal applications with third-party platforms.
• Design, maintain and optimize relational databases, including Microsoft SQL Server and PostgreSQL.
• Find and fix performance bottlenecks, application defects and database issues.

DevOps, Quality & Leadership

• Set up and maintain CI/CD pipelines, automated testing environments and deployment processes.
• Perform code reviews, troubleshoot production issues and keep technical documentation current.
• Work with cross-functional teams to gather requirements and deliver dependable software.
• Mentor junior developers and contribute to architecture and development best practices.

Required Qualifications

• Bachelor's degree in Computer Science, Software Engineering, Information Technology or a related field.
• 5+ years of professional software development experience, preferably in enterprise applications.
• Strong proficiency in C#, .NET/.NET Core and ASP.NET Core.
• Hands-on experience with React, JavaScript, TypeScript, HTML and CSS.
• Strong knowledge of Microsoft SQL Server and PostgreSQL, including database design and query optimization.
• Experience building RESTful APIs and integrating third-party services.
• Familiarity with Git, CI/CD, testing and deployment.
• Proficiency in English and Mandarin Chinese.

Preferred Qualifications

• Experience developing or modernizing ERP, inventory, accounting or other enterprise systems.
• Experience with AWS or Microsoft Azure.
• Familiarity with Docker, Jenkins, Azure DevOps or similar tools.
• Experience with microservices, cloud-native applications and distributed systems.
• Familiarity with monitoring tools such as Grafana or AWS CloudWatch.
• Experience with Angular, Vue.js or Python.
• Experience in manufacturing, semiconductor or enterprise operations environments.

Skills & Competencies

• Full-stack enterprise development
• Legacy system modernization
• Database design and optimization
• API design and integration
• CI/CD and automated testing
• Technical leadership and mentoring
• Cross-functional and bilingual communication
• Analytical problem-solving

Benefits

• 100% Paid Benefits for the Employee: Medical, Dental, Vision and Life Insurance
• Paid Time Off (PTO)
• 401(k) Plan

Work Environment

This is a full-time, onsite role in our Phoenix, AZ office. You'll work closely with business users and a small development team, balancing new development with production support as priorities change.

Equal Employment Opportunity Statement

Marketech International Corporation USA is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, veteran status or any other characteristic protected by law. We are committed to a respectful, inclusive and collaborative workplace.