Wafer-Level Test Engineer: Yield & Process Optimizer

Lumilens Inc.; Singapore; On-site; SGD 90,000 - 150,000; Full time

Benefits offered by this job

Competitive salary

Career growth

World-class team

Collaborative environment

Job summary

Lumilens is seeking a hands-on wafer-level test engineer to own and optimize wafer-level testing processes in our Singapore fab. You will lead setup and qualification of automated probers, optical alignment systems, and ATE, and drive yield, cycle time, and process control improvements with cross-functional teams.

You should have a strong analytical mindset, 5+ years in semiconductor wafer testing, and proficiency with data analysis tools (Python/R/Spotfire) to monitor performance and implement

Qualifications

• Bachelor’s degree in a relevant engineering field.
• Minimum 5 years in semiconductor wafer-level testing.
• Proficient in data analysis for yield modeling and SPC.
• Experience with DOE and continuous improvement.
• Strong cross-functional communication and project management.

Responsibilities

• Wafer-Level Test Process Ownership: Own and continuously improve wafer-level test processes for stable, repeatable production.
• Production Operations: Drive day-to-day wafer-level test operations and monitor performance.
• Test Process Development & Qualification: Develop and qualify test flows, conditions, and parameters.
• Process Control: Establish specifications, control plans, and monitoring methods.
• Yield Improvement & Failure Debug: Monitor yield, identify losses, and lead corrective actions.
• Test Data Analysis: Analyze data to identify trends and shifts; track performance metrics.
• Process Documentation: Create process specs, work instructions, and qualification reports.
• Cycle Time & Productivity Improvement: Improve test cycle time, throughput, and cost.
• Continuous Improvement: Lead DOE, SPC, Six Sigma projects to improve capability.
• Cross-Functional Collaboration: Work with engineering, quality, supply chain, and management.

Skills

Analytical thinking

Problem solving

Cross-functional collaboration

Process optimization

Data-driven decision making

Education

Bachelor’s degree in Electrical/ Electronics/ Microelectronics/ Physics/ Optical Engineering

Tools

JMP

Spotfire

Python

R

Job description

Lumilens is seeking a hands-on wafer-level test engineer to own and optimize wafer-level testing processes in our Singapore fab. You will lead setup and qualification of automated probers, optical alignment systems, and ATE, and drive yield, cycle time, and process control improvements with cross-functional teams.

You should have a strong analytical mindset, 5+ years in semiconductor wafer testing, and proficiency with data analysis tools (Python/R/Spotfire) to monitor performance and implement