R&D Power Electronics Engineer

R&D Power Electronics EngineerPower Electronics Engineer - High Power AC/DC (kW-MW)Product Manager & Technical Lead / Solution Architect for High Power AC/DC ProductsLocation: Fremont, CA (on-site only)Employment Type: Full-timeTeam: Advanced Development / Platform R&D (Medium to High Power)Role SummaryWe are looking for:1) Power Electronics Engineer to support advanced development and platform-level R&D for high-power AC/DC power conversion systems spanning single-phase and three-phase solutions from several kW up to MW-class.2) Technical Product Manager or Technical Lead / Solution Architect (individual contributor role) to bridge engineering and business strategy, investigate and discuss customers' needs for their next GEN platforms and define high-level specifications of Delta high power AC/DC power products.Both roles are on-site in Fremont, CA and include frequent interaction with U.S. customers to understand application needs, support technical evaluations, and provide engineering input to R&D priorities.Engineers will also need to support complex customer escalations that require deeper design-level troubleshooting beyond standard Field Application Engineering (FAE) processes.Note: This role is focused on Platform definition / R&D / prototype / reference design work. It does not own production ramp up, manufacturing support, or sustaining engineering.What You'll Do (Responsibilities)Prototype & Advanced Development (no production ownership)Support development of high-power AC/DC prototypes and reference designs (single-phase and three-phase; kW to MW) through circuit evaluation, lab testing, and iterative improvements.Execute technical investigations / sub-system evaluations such as topology comparisons, efficiency improvements, protection methods, and thermal/EMI mitigation approaches.Perform hands-on bring-up, characterization, and debugging of power stages and system prototypes using lab equipment (scope, power analyzer, electronic load, etc.).Analyze test data, document findings, and implement design adjustments to meet performance targets.Customer Engagement & Technical Support (U.S. customers)Participate in customer technical discussions to understand requirements and constraints; communicate trade-offs and recommend engineering approaches clearly.Support customer evaluations by preparing test results, answering design questions, and providing timely technical follow-up.Work with internal teams to translate customer feedback into actionable engineering tasks or technical experiments. Define new products and platforms that will contribute to Delta advancement in the power industry and that will help Delta's product offering remain competitive and well aligned with upcoming customer's needs.Escalation Support (beyond FAE)* Support complex or ambiguous escalations-cases where typical FAE troubleshooting is insufficient-by driving structured debug plans, hypothesis testing, and root-cause analysis.* Coordinate with global R&D partners to converge on containment actions and technical resolution options.Global Collaboration* Collaborate with global R&D centers to share results, reuse proven design approaches, and contribute to common design guidelines/best practices.* Produce clear engineering artifacts: test plans, experiment reports, design notes, and concise recommendations.Minimum QualificationsPh.D. in Electrical Engineering, Power Electronics, Power Conversion/Drives, or a related fieldStrong in fundamentals of power electronics with proven hands-on lab capability.Experience in designing, testing and debugging of high-power switching converters (AC/DC and/or DC/DC and/or inverter/rectifier experience acceptable).Comfortable with engaging customers in technical discussions and communicating clearly in a professional setting.Self-motivated, dependable, collaborative; able to work effectively across time zones and functions.Preferred Qualifications (Nice to Have)Experience in renewable energy / high-power conversion (e.g., solar inverters, PCS, EV charging, UPS, industrial power) that is transferable to MW-class systems.Familiarity with high-power semiconductors (IGBT/MOSFET/SiC/GaN as applicable), gate drives, sensing, and protection schemes.Practical understanding of EMI/EMC fundamentals and mitigation in high-power switching systems.Experience with simulation/modeling tools (SPICE, MATLAB/Simulink, PLECS) is a plus.DSP/MCU digital control is a plus but not required.Work Environment* On-site only in Fremont; frequent lab work and in-person collaboration.* Regular customer interaction in the U.S.; occasional traveling may be required.Equal Opportunity EmployerWe are an Equal Opportunity Employer and value diversity at our company.