Sr Principal Technical Support Engineer (Semiconductors)

Location: Remote in the USA, California outside the Bay Area; onsite support at customer fabs and OSATs when required. Employees cannot be located in AL, AK, AR, DE, GA, HI, IL, IA, LA, ME, MD, MS, MO, NE, NV, NJ, NM, ND, OK, PA, RI, SC, SD, TN, WV, WI, or WY.

Salary: $122,600–$160,965 per year in Sacramento, California, depending on experience, skills, and background.

Company

hirify.global provides semiconductor test and measurement technologies across characterization, modeling, reliability, design debug, qualification, and production testing.

What you will do

• Provide technical support for probe card products in production environments and serve as the primary escalation point for complex technical issues.
• Diagnose yield excursions, electrical continuity issues, contact problems, probe alignment, wear, contamination, and parametric anomalies during wafer sort.
• Perform root cause analysis using ATE data, electrical measurements, microscopy, inspection tools, and wafer sort data.
• Advise on probe card setup, optimization, overdrive, contact force, cleaning cycles, alignment, and maintenance.
• Collaborate with product engineering, manufacturing, field service, and failure-analysis teams on CAPA, ECR/ECO, NPI, and customer qualifications.
• Analyze wafer test datasets, create technical reports and dashboards, track contact resistance, probe-card-attributable yield loss, and MTBF, and deliver customer training.

Requirements

• At least 8 years of related experience with a Bachelor’s degree, or 6 years with a Master’s degree, or a PhD with 3 years of experience, or equivalent experience.
• Expertise in semiconductor test processes, probe card technology, and customer technical support.
• Experience diagnosing electrical, mechanical, and process-related issues using electrical measurements, ATE data, microscopy, inspection tools, and wafer sort data.
• Ability to analyze large datasets and prepare technical reports, dashboards, and failure summaries.
• Ability to support customers remotely and onsite at fabs and OSATs when required.
• Strong communication, customer focus, analytical analysis, problem-solving, and debugging skills.
• Ability to work in clean-room environments and use Microsoft Office and data analysis tools.

Nice to have

• Experience with hirify.global probe cards or similar technologies.
• Knowledge of advanced nodes, including FinFET and 5nm/3nm processes.
• Experience supporting high-volume manufacturing, yield engineering, or test optimization.
• Prior field application or customer-facing experience.
• Automatic wafer prober user experience.
• Hands-on mechanical assembly and electrical debugging experience.
• Ability to speak Mandarin or Korean.

Culture & Benefits

• Day-shift schedule with a full-time employment arrangement.
• Medical, dental, vision, life insurance, and disability coverage.
• 401(k) with company match, employee stock purchase plan, paid time off, and flexible spending or savings accounts.
• Quarterly profit-sharing bonuses.
• Environment focused on customer service, ownership and accountability, respectful communication, and employee development.