Sr Test Engineer

We are seeking an experienced Semiconductor Test Engineer to join our engineering team in Kodaira, Tokyo, Japan .

This is a hands-on technical role with the opportunity to develop and deploy production test solutions for advanced semiconductor products. You will work across the full test-development lifecycle, from test strategy and hardware development through characterization, qualification, production release, and continuous improvement.

The role has a strong focus on quality, manufacturability, test coverage, test efficiency, yield, and cost of test , while providing opportunities to solve challenging technical problems and collaborate with engineering and manufacturing teams around the world.

Key Responsibilities

• Develop and implement semiconductor test strategies, test plans, DFT requirements, test methods, and ATE solutions for wafer sort/probe, characterization, qualification, and final production test.
• Develop, debug, optimize, and maintain ATE test programs using C/C++ and platform-specific programming environments , with focus on test coverage, measurement accuracy, test time, multisite efficiency, yield, and cost of test.
• Develop robust test solutions for power ICs and analog/mixed-signal semiconductor products , including appropriate techniques for high-current testing.
• Design and debug test hardware , including load boards, DUT interface boards, probe interfaces, and associated circuitry.
• Validate test solutions through pre-silicon simulation to verify test methods, test-program functionality, and ATE implementation prior to first silicon.
• Apply strong analog and mixed-signal engineering fundamentals to troubleshoot complex interactions among the device, ATE, test program, test hardware, and manufacturing environment .
• Perform test-method validation and production-readiness activities, including ATE-to-bench correlation, spike-check, characterization, GR&R, guardband analysis, and test-limit validation .
• Drive improvements in test time, multisite efficiency, yield, test robustness, and cost of test .
• Establish test-development milestones, schedules, dependencies, technical risks, and mitigation plans , and communicate progress and issues clearly to project stakeholders.
• Collaborate with product, design, DFT, systems, manufacturing, quality, and other engineering teams across Japan and global locations.
• Provide technical guidance and mentoring to other engineers and contribute to continuous improvement of test engineering methods and processes.

Qualifications

• Bachelor's degree in Electrical Engineering, Computer Engineering, Electronics Engineering, or a related technical field , or equivalent relevant engineering experience.
• 4+ years of semiconductor test engineering experience , preferably involving analog, mixed-signal, power, or automotive semiconductor products.
• Hands-on experience developing and debugging ATE test programs and test hardware for wafer sort/probe and/or final production test.
• Experience with semiconductor ATE platforms such as Teradyne ETS-88/ETS-800, Cohu DiamondX, or equivalent platforms .
• Strong understanding of analog and mixed-signal electronics , including measurement accuracy, signal integrity, grounding, power delivery, and troubleshooting techniques.
• Experience with power IC or other high-current semiconductor devices and associated test methodologies.
• Experience with pre-silicon simulation or simulation-based validation of semiconductor test methods and ATE test programs is an advantage.
• Experience with schematic capture and PCB design tools such as Altium Designer, Cadence/OrCAD, or equivalent .
• Working knowledge of semiconductor production-test methodologies, including characterization, qualification, correlation, GR&R, sampling, multisite testing, production release, test-time optimization, yield improvement, and cost-of-test reduction .
• Strong analytical and troubleshooting skills, with the ability to independently investigate complex technical issues and drive them toward resolution.
• Strong communication and collaboration skills, with the ability to work effectively in a multicultural and geographically distributed engineering organization .
• Experience with automotive semiconductor products and associated qualification or production requirements is an advantage.

Language Skills

• English: Ability to communicate effectively in a global engineering environment
• Japanese: Preferred but not required. Japanese proficiency is an advantage for collaboration with local teams in Japan.

ルネサスは、「To Make Our Lives Easier（人々の暮らしをより豊かで快適にする）」というPurposeのもと、組込み半導体ソリューションを提供するグローバル企業です。世界30か国以上で活躍する21,000人を超えるエンジニアや課題解決のプロフェッショナルとともに、自動車、産業、インフラ、IoT分野における世界最先端のテクノロジー開発に携わり、より安全で、健康的で、環境にやさしく、スマートな未来の実現に貢献しています。

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