Full Stack Software Developer, Manufacturing; Bilingual - Mandarin

We are seeking a Full Stack Software Developer to design, build, and own the internal software systems that power our manufacturing operations. This is a high-autonomy role spanning the entire stack; from front-end dashboards and back-end services to equipment-level communication protocols where you will drive architecture decisions and deliver end-to-end solutions across MES/RMS integrations, production monitoring tools, and SECS/GEM host software.

The ideal candidate pairs strong C#/.NET fundamentals with the initiative to define systems in a growing environment, not just maintain them.

You will join a team of approximately ten engineers within the MIS department, working alongside MES, database, and systems engineering colleagues in an open office environment with occasional time in cleanroom manufacturing areas. As AOI scales U.S. production capacity to meet accelerating AI datacenter demand, this role will be central to building the software infrastructure that supports higher throughput, better yield and yield visibility, with more reliable equipment automation.

• Design, develop, own, and maintain full-stack web applications for internal manufacturing operations, including production dashboards, equipment monitoring portals, and operational tools.
• Implement scalable and maintainable software architectures that serve multiple teams across manufacturing, process engineering, quality, and operations.
• Write clean, efficient, and well-documented code that adheres to best practices and coding standards.

• Maintain and enhance EAP (Equipment Automation Program) software that enables communication between manufacturing equipment and factory systems.
• Configure and maintain SECS/GEM communication in compliance with SEMI standards (e.g., SECS-I, HSMS, GEM), including equipment messaging, event reporting, alarms, status variables, and remote command execution.
• Support equipment qualification and acceptance testing using SECS/GEM requirements.

• Integrate manufacturing tools with:
• MES (Manufacturing Execution System) for lot tracking and production control
• RMS (Recipe Management System) for recipe download, validation, and version control
• Collaborate with cross-functional teams (Process Engineering, Manufacturing, IT, Quality) to ensure seamless system interoperability.

• Build and maintain web-based dashboards for:
• Production performance monitoring and yield analysis
• Equipment health and downtime tracking
• Utilize SQL databases to store, query, and analyze production and equipment data.
• Support continuous improvement initiatives through data-driven insights and visualization.

• Diagnose and resolve complex equipment automation, communication, and data integrity issues in a high-volume manufacturing environment.
• Provide support during production issues related to automation systems as needed.
• Work directly with equipment vendors to resolve interface or protocol issues.
• Develop and maintain software design documents, interface control documents (ICDs), and operational procedures.
• Ensure systems comply with internal controls, quality standards, and audit requirements.
• Identify automation opportunities to improve throughput, reduce manual intervention, and enhance equipment utilization.
• Stay current on emerging technologies and propose system enhancements aligned with AOI’s manufacturing roadmap.

Candidates must be authorized to work in the United States. Visa sponsorship is not available for this position.

Required

• Bachelor’s or master’s degree in computer science, Electrical Engineering, Automation Engineering, or a related STEM…