Senior System Application HDD Diagnostic Engineer

Company Description

WD is building the infrastructure behind the AI-driven data economy.

As AI scales, so does data. Every interaction, every model, every system generates data that must be stored, managed, and made accessible over time. That’s where we come in.

We combine deep engineering expertise with global-scale manufacturing to deliver the storage systems that make AI possible, powering hyperscale data centers, cloud platforms, and enterprise infrastructure worldwide.

This isn’t theoretical work. It’s real systems, at real scale, people solving some of the hardest challenges in technology today.

We’re looking for people who want to build, solve, and operate at that level.

Join us and let’s shape the future of data.

Job Description

The System Application HDD Diagnostic Engineer is responsible for enterprise HDD system behavior, diagnostics, customer integration, and root‑cause analysis. This role partners closely with China‑based cloud, OEM/ODM, and hyperscale customers to ensure successful HDD qualification, debug complex system‑level issues, and drive improvements into product design and validation. Staff and Principal levels differ in technical depth, leadership scope, and strategic influence.

ESSENTIAL DUTIES AND RESPONSIBILITIES:

1. Responsible for enterprise HDD system behavior analysis, diagnostics, customer integration support, and root cause analysis to support successful product qualification in China customer environments.
2. Take direction from senior team members to support technical engagement with China-based cloud, OEM/ODM, and hyperscale customers, helping resolve complex system-level issues and drive improvements into product design and validation.
3. Support system-level diagnostics for HDD functional, electrical, mechanical, firmware, and host interaction issues.
4. Perform root cause analysis using drive logs, protocol traces, system logs, error signatures, performance data, and platform-dependent behavior.
5. Conduct specification gap analysis, feature validation, interoperability testing, and workload-based behavior characterization.
6. Collaborate with global Firmware, ASIC, Servo, Mechanical, Reliability, Manufacturing, and Quality teams to drive corrective actions and feature improvements.
7. Support customer sample planning, execution, tracking, and qualification deliverables.
8. Validate fixes and enhancements in customer environments and ensure robust closure.
9. Support preparation of technical reports, failure analysis summaries, and update presentations to internal teams and customers.
10. Participate in the development of internal troubleshooting guides, diagnostic scripts, test methodologies, and platform-specific best practices.
11. For Principal level, influence product architecture, drive long-term diagnostic strategy, and lead cross-functional initiatives.

Qualifications

1. Bachelor’s degree or above in Electrical Engineering, Mechanical Engineering, Computer Engineering, Physics, or other related fields. Master’s degree or PhD is preferred.
2. Strong ability to isolate and analyze complex system-level issues involving firmware, mechanics, electronics, and host interactions.
3. Fluent Mandarin is required to support customer engagement in China.
4. Excellent verbal and written communication skills in English.
5. PREFERRED QUALIFICATIONS:
6. Familiarity with HDD architecture, including microcode/firmware layers, servo, head/media interactions, and electrical/ASIC behavior.
7. Experience with SAS/SATA protocol analyzers, signal integrity tools, performance profiling, environmental stress testing, or HDD diagnostic instrumentation.
8. Python or similar scripting skills for log parsing, automation, or analytics.
9. Familiarity with data center storage system environments.
10. Willingness to travel within China and occasionally internationally to support customer engagements and joint investigations.

Additional Information

WD is committed to providing equal opportunities to all applicants and employees and will not discriminate against any applicant or employee based on their race, color, ancestry, religion (including religious dress and grooming standards), sex (including pregnancy, childbirth or related medical conditions, breastfeeding or related medical conditions), gender (including a person’s gender identity, gender expression, and gender-related appearance and behavior, whether or not stereotypically associated with the person’s assigned sex at birth), age, national origin, sexual orientation, medical condition, marital status (including domestic partnership status), physical disability, mental disability, medical condition, genetic information, protected medical and family care leave, Civil Air Patrol status, military and veteran status, or other legally protected characteristics. We also prohibit harassment of any individual on any of the characteristics listed above. Our non-discrimination policy applies to all aspects of employment. We comply with the laws and regulations set forth in the "Know Your Rights: Workplace Discrimination is Illegal” poster. Our pay transparency policy is available here.

WD thrives on the power and potential of diversity. As a global company, we believe the most effective way to embrace the diversity of our customers and communities is to mirror it from within. We believe the fusion of various perspectives results in the best outcomes for our employees, our company, our customers, and the world around us. We are committed to an inclusive environment where every individual can thrive through a sense of belonging, respect and contribution.

WD is committed to offering opportunities to applicants with disabilities and ensuring all candidates can successfully navigate our careers website and our hiring process. Please contact us at jobs.accommodations@wdc.com to advise us of your accommodation request. In your email, please include a description of the specific accommodation you are requesting as well as the job title and requisition number of the position for which you are applying.

WD thrives on the power and potential of diversity. As a global company, we believe the most effective way to embrace the diversity of our customers and communities is to mirror it from within. We believe the fusion of various perspectives results in the best outcomes for our employees, our company, our customers, and the world around us. We are committed to an inclusive environment where every individual can thrive through a sense of belonging, respect and contribution.

WD is committed to offering opportunities to applicants with disabilities and ensuring all candidates can successfully navigate our careers website and our hiring process. Please contact us at jobs.accommodations@wdc.com to advise us of your accommodation request. In your email, please include a description of the specific accommodation you are requesting as well as the job title and requisition number of the position for which you are applying.

Notice To Candidates: Please be aware that WD and its subsidiaries will never request payment as a condition for applying for a position or receiving an offer of employment. Should you encounter any such requests, please report it immediately to WD Ethics Helpline or email compliance@wdc.com.