Staff Wafer-Level Testing Equipment Engineer

Singapore · 5+ years experience · Full-time · Onsite · Posted Oct 9, 2026

At a glance

At Lumilens, we are building the essential photonics infrastructure that will drive tomorrow’s AI supercomputing. From chip-to-chip optical interconnects to scalable photonic engines, Lumilens is ushering in a new era of computing that is faster, cooler, and dramatically more efficient. We’re a well-funded startup backed by Mayfield and led by veterans who have built and scaled some of the industry’s most transformative technologies.

The Staff Wafer-Level Testing Equipment Engineer is responsible for the lifecycle management, qualification, and operational excellence of wafer-level testing equipment.
This role serves as the subject matter expert for wafer probing, test handling, and associated automation systems within Lumilens' manufacturing operations.

Lead the evaluation, selection, procurement, installation, qualification, and ramp-up of wafer-level testing equipment.
Serve as the subject matter expert for wafer probers, wafer handling systems, test interfaces, probe cards, and handlers.
Develop and execute equipment qualification plans including IQ, OQ, PQ, and manufacturing readiness.
Drive high equipment availability and utilization by minimizing unscheduled downtime.
Establish and implement preventive and predictive maintenance programs to improve reliability and yield.
Optimize equipment performance and capability to support production throughput and manufacturing ramp.
Collaborate with WLT Operations and Process Engineering to ensure equipment meets test process requirements.
Monitor equipment performance metrics such as uptime, MTBF, and MTTR.
Manage equipment vendors and OSAT suppliers for upgrades, retrofits, and spare parts inventory.
Coordinate with cross-functional teams including Quality, Industrial Engineering, and Supply Chain for stable production execution.

Bachelor’s degree in Mechanical Engineering, Electrical Engineering, Mechatronics, Automation Engineering, or a related discipline.
Minimum 5 years of hands-on experience operating, troubleshooting, qualifying, and maintaining semiconductor wafer-level testing equipment.
Strong understanding of wafer probing, wafer handling, test interfaces, probe cards, handlers, and automated wafer-level test systems.
Strong experience in equipment troubleshooting, root-cause analysis, preventive maintenance, and corrective action.
Experience with equipment performance metrics, including uptime, utilization, MTBF, MTTR, and equipment capability.
Strong cross-functional communication and project management skills.

Experience working with semiconductor wafer fabs, OSATs, wafer-level test houses, equipment suppliers, or other external manufacturing partners.
Experience in photonics, silicon photonics, optical testing, or advanced semiconductor packaging.