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Cesna Recruitment

Technical Support Engineer (Package Substrate) Bilingual in Korean

Cesna Recruitment
Cupertino, CA Full time Posted 5d ago
Customer Support Korean Language On-site Technical Support
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Job Description

Work onsite in Cupertino, CA supporting advanced package substrate customer development programs. In this bilingual role, you will combine deep technical expertise with customer-facing communication to help teams move from early proof points to stable, production-ready substrate solutions.

Responsibilities

  • Provide bilingual technical support for customer development programs including Mobile AiP, SiP, FC-CSP, and RF.
  • Resolve technical issues and drive performance stabilization at the customer.
  • Identify and develop PoC opportunities through customer engagement.
  • Guide BOM and substrate structure selection using LGIT technical solutions.
  • Lead design reviews, perform TRA assessments, support yield improvement, and advance production readiness.
  • Coordinate across customer engineering and LGIT R&D, Process, Quality, and Manufacturing.
  • Conduct regular customer meetings and deliver technical presentations.
  • Collect VOC and market intelligence to shape technology roadmap inputs.
  • Support technology promotions, exhibitions, and strategic customer engagements.
  • Promote advanced substrate technologies including Hybrid Stack-up, Fine Pattern, Cavity, and Hyper Flex.

Requirements

  • Bachelor's degree or higher in Engineering, Materials Science, Chemistry, or a related field.
  • Bilingual in English and Korean.
  • 10+ years in package substrate development, process, customer engineering, or technical marketing.
  • Proven record of leading substrate projects through mass production.
  • Experience supporting major semiconductor customers is preferred.
  • Deep knowledge of substrate processes, materials, structures, and design rules.
  • Hands-on experience with ABF, ETS, Hybrid Stack-up, Cavity, Fine Pattern, and RF.
  • Ability to translate customer requirements into technical solutions.
  • Experience in NPI, yield improvement, and production transfer.
  • Strong customer relationship management, with clear technical presentation and communication skills.
  • Project management and problem-solving capability.
  • Proficiency with MS Office (PowerPoint, Excel, Word).
  • Six Sigma Green Belt or equivalent is preferred.
  • PMP or equivalent project management certification is preferred.

Travel and work setup

  • On-site customer support with frequent customer engagement.
  • Frequent travel to customer sites within the U.S.
  • Periodic travel to Korea for engineering and business reviews.

Technologies: Mobile AiP, SiP, FC-CSP, RF, LGIT technical solutions, ABF, ETS, Hybrid Stack-up, Cavity, Fine Pattern, NPI, MS Office (PowerPoint, Excel, Word).

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