Senior/Staff Quality Assurance Engineer or Manager (OSAT)

Job Title

Senior/Staff Quality Assurance Engineer or Manager (OSAT)

Role Summary

Lead and manage quality assurance for semiconductor assembly and test activities with OSAT partners. Set and maintain quality standards, drive failure analysis and corrective actions, and coordinate with engineering, suppliers, and customers to improve yield and reliability.

Operate within the manufacturing/operations quality function focusing on assembly, packaging and test process control and continuous improvement.

Experience Level

Senior — typically requires 5+ years of semiconductor assembly and test quality experience, preferably in OSAT or IDM environments.

Responsibilities

Core responsibilities include quality management, failure analysis, process control, supplier/customer quality, and audits:

• Define and maintain quality standards, control plans, PFMEA, process flows, and work instructions for assembly and test processes.
• Lead root cause analysis using 8D, 3x5 Why, Fishbone and manage CAPA for quality excursions and customer complaints.
• Support failure analysis activities and coordinate corrective actions with engineering teams.
• Monitor process capability with SPC; analyze yield, defect trends, and reliability data.
• Lead continuous improvement projects to reduce defects and improve yield performance.
• Manage supplier quality activities and interface with OSAT partners, customers, and internal stakeholders on quality issues.
• Manage change control requests related to materials, processes, and equipment.
• Conduct internal and external quality audits and support customer audits and certification activities.

Requirements

Must-have technical skills and experience; preferred items noted separately.

• 5+ years of semiconductor assembly and test quality experience in OSAT or IDM environments.
• Knowledge of packaging technologies such as Flip Chip, BGA, QFN, WLCSP, bumping, fan-out, back-grind, wafer saw, and 2.5D/interposer assembly. Wafer & final test quality experience preferred.
• Hands-on experience with Statistical Process Control (SPC), Failure Analysis (FA), FMEA/PFMEA, CAPA, 8D problem solving, DOE, yield analysis, defect reduction, and reliability engineering.
• Familiarity with QMS and standards: ISO 9001, IATF 16949, JEDEC, and customer-specific quality requirements.
• Experience with analysis tools (Minitab, JMP, Excel); SQL knowledge preferred.
• Strong analytical and troubleshooting skills; effective communication and presentation abilities.

Nice-to-have:

• Experience conducting supplier audits and qualification activities.
• Prior management or team lead experience.

Education Requirements

Bachelor's degree in Electrical Engineering, Electronics Engineering, Materials Science, Mechanical Engineering, Physics, Chemistry, or a related field.

About the Company

Company: Lumilens

Headquarters: San Jose, CA, USA

Lumilens develops integrated photonics and optical interconnect solutions for high-speed data communication and chip-to-chip interfaces, focusing on optical front-end hardware and co-packaged optics for advanced semiconductor systems.