Sr Reliability Engineer, Power Electronics & Electrical

Nextracker • Fremont, CA

80d • $160,000 - $180,000

About The Position

Nextracker is seeking a highly motivated and detail-oriented Sr Reliability Engineer, Power Electronics & Electrical to join our Reliability team. In this role, you will drive the reliability, robustness, and long-term performance of our power electronics and electrical cabling products throughout their lifecycle-from concept and design to testing and deployment. This role merges rigorous design reliability practices with hands-on validation and failure analysis in a fast-paced, cross-functional environment.

Requirements

• Bachelor's or Master's degree in Electrical Engineering, Power Electronics, or a related field. Master's degree preferred.
• Proven experience (7+ years) working with high voltage systems, high power electronics, and DC-DC converters, preferably in renewable power electronics, electric vehicle, or industrial power systems.
• Experience with reliability standards and analysis methods: DFMEA, MTBF, FIT, ALT, HALT, and HASS.
• Background in Ansys Sherlock, Physics of failure principles and failure rate predictions based on stress factors like vibration, shock, temperature cycling and thermal gradients.
• Knowledge of industry standards and certifications for power electronics, including IEC, UL, JEDEC and IEEE.

Nice To Haves

• Knowledge of Physics of Failure principles, Weibull life data analysis, and stress-based modeling techniques.
• Experience with PCBA-level derating analysis and reliability assessments for data center or energy infrastructure applications.
• Hands-on lab skills with electrical, thermal, and vibration test environments.
• Experience with Insulation Resistance, Dielectric Withstand and environmental testing for PV cabling, connectors and polymer overmolds.
• Familiarity with reliability planning for product field deployment and field return data analysis.

Responsibilities

• Implement advanced DfR methodologies to proactively mitigate potential failure modes in high-voltage and power electronic systems.
• Perform component derating analysis, thermal/mechanical stress evaluations, and ensure compliance with standards (JEDEC, IEC, UL).
• Conduct DFMECA and Fault Tree Analysis, and own the reliability requirements definition and tracking.
• Lead and define HALT/HASS testing protocols to expose early-life and latent design weaknesses.
• Develop and execute accelerated life testing (ALT) strategies across electrical, thermal, and mechanical domains.
• Perform hands-on power converter validation (step load testing, power cycling, vibration testing, etc.) using lab instrumentation (oscilloscopes, spectrum analyzers, etc.).
• Investigate failures in design, validation, and field environments using advanced techniques such as SEM/EDS, X-ray, FTIR, and dye/pry methods.
• Coordinate internal and third-party failure analysis efforts and drive implementation of corrective and preventive actions.
• Design tests needed to verify failure mode and see through implementation of corrective actions and solutions.
• Use LT Spice, OrCAD, and simulation tools to analyze and validate circuit behavior under stress.
• Perform reliability prediction and modeling using tools such as ANSYS, RAM Commander, ReliaSoft, and Windchill.
• Partner with design, test, and supplier engineering teams to ensure reliability targets are met throughout development cycles.
• Serve as the technical leader in reliability risk reviews and design validation gates.
• Communicate progress through presentations and technical reports to management.

Benefits

• Health care coverage
• Dental and vision insurance
• 401(K) participation including company matching
• Company paid holidays with unlimited paid time off
• Generous discretionary company bonuses
• Life and disability protection
• Stock compensation eligibility for certain positions

What This Job Offers

• Career Level: Senior
• Industry: Electrical Equipment, Appliance, and Component Manufacturing
• Education Level: Master's degree
• Number of Employees: 1,001-5,000 employees