Senior Reliability Engineer - Power Electronics

Lunar Energy • Mountain View, CA

4d • $140,000 - $195,000

About The Position

Reliability Engineers at Lunar Energy help ensure product reliability throughout the full lifecycle of the company’s home energy products. The role contributes during design, develops reliability test plans, assesses ongoing field performance, and drives product improvement. This position focuses on power electronics and battery systems and collaborates with mechanical and electrical engineers, as well as teams such as Finance. Lunar Energy is a global clean-energy company working to electrify homes and connect communities through virtual power plants.

Requirements

• Degree in Mechanical Engineering, Electrical Engineering, Chemical Engineering, Physics, or equivalent.
• Proven track record of solving complex power electronics reliability failures.
• Working knowledge of the theory of operation of common power converter topologies, such as inverters and buck-boost converters.
• Strong understanding of PCBA-level failure physics, including CTE mismatch, solder fatigue, contact resistance, and insulation degradation.
• Familiarity with failure modes in common power electronics components, including electrolytic capacitors, relays, semiconductors, and magnetics.
• Working knowledge of failure analysis techniques such as optical microscopy, SEM, CSAM, X-ray, cross-sectioning, and EDX, including selecting appropriate techniques for particular failures.
• Experience with accelerated life testing models and governing equations, specifically for PCBAs, battery storage, and relevant mechanical structures.
• Understanding of reliability statistics.

Responsibilities

• Collaborate with mechanical and electrical engineers during hardware design to establish and refine component- and system-level reliability targets for power electronics and battery systems.
• Provide Design for Reliability (DfR) input during new product development.
• Lead Design Failure Modes and Effects Analyses (DFMEA) to capture performance risks and implement mitigation activities.
• Develop accelerated life testing (ALT) reliability test plans for components and subsystems using identified risks, reliability targets, and physics-of-failure methodology.
• Track field reliability performance, including part replacements, customer complaints, and fault codes; identify opportunities for continuous product improvement and reliability growth.
• Collaborate with the Finance team to provide insights into the warranty program.
• Lead failure analysis of reliability test results and/or field returns to determine root causes and drive product improvement through containment and corrective actions.

Benefits

• Equity in the company and participation in its employee stock program.
• Medical, dental, and vision insurance for employees and dependents.
• Flexible Paid Time Off and 10 paid holidays.
• Tax-deferred 401(k) plan.
• Paid parental leave for full-time employees, including 12 weeks for the birthing mother and 6 weeks for the non-birthing parent.
• Subsidized EV charging and pre-tax commuter benefits.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior