Support Jobs in Cupertino, CA

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Technical Support Engineer (Package Substrate) Bilingual in Korean

Cesna Recruitment Cupertino, CA

Cupertino, CA

Today

Full time Customer Support Korean Language On-site

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Job Description

Cesna Recruitment offers an onsite technical support role in Cupertino, CA, centered on helping package substrate customers move from development through production readiness. This bilingual position supports major customer programs, enabling you to use deep substrate expertise to stabilize performance, improve yield, and shape technology roadmaps with real customer input. The role also includes regular customer meetings and technical presentations, plus opportunities to support strategic engagements, exhibitions, and technology promotions.

Responsibilities

Provide 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, TRA assessments, yield improvement, and production readiness activities.
Coordinate between customer engineering and LGIT R&D, Process, Quality, and Manufacturing teams.
Conduct regular customer meetings and deliver technical presentations.
Collect VOC and market intelligence to influence 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 of experience in package substrate development, process or customer engineering, or technical marketing.
Proven track record leading substrate projects through mass production.
Experience supporting major semiconductor customers 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 skills and clear technical communication.
Project management and problem-solving capability.
Proficiency with MS Office (PowerPoint, Excel, Word).
Six Sigma Green Belt or equivalent preferred.
PMP or equivalent project management certification preferred.

Travel & Location

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

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