Battery and Power Systems Engineer

SiFly • Santa Clara, CA

17h • Onsite

About The Position

SiFly is hiring a lead engineer for battery packs and high-current distribution in its vertical-takeoff, long-endurance aircraft. The role covers battery cell selection and evaluation, pack architecture and design, thermal and electrical engineering, battery management system (BMS) architecture and characterization, and charge control. The engineer will work with cell and pack vendors, manufacturing partners, and safety testing and certification efforts.

This is a hands-on position at a small, fast-moving company. Work takes place at the bench, in the shop, on the flight line, and occasionally at customer sites to troubleshoot deployed systems, alongside new product development. The position is onsite in Santa Clara, California. Compensation is $120,000–$165,000.

Requirements

• Deep electrical engineering expertise and practical experience with high-voltage or high-energy battery systems.
• Experience taking a lithium-ion battery pack from cell selection through to a shipping product.
• BMS electronics experience and ability to specify system architecture options and firmware behavior.
• Experience with cell monitoring, balancing, protection circuits, and isolation measurement.
• Hands-on bench skills, including instrumenting a pack, conducting thermal characterization, and interpreting results.
• Battery safety testing experience.
• Ability to anticipate failures systematically using methods such as DFMEA, worst-case circuit analysis, derating, stress analysis, and thermal-margin analysis.
• First-principles approach and interest in understanding the rationale behind established approaches to propulsion, power systems, and radio technologies.
• Use of AI as a practical work tool and ability to describe a specific example of an AI-enabled workflow, problem-solving approach, or analysis.

Nice To Haves

• Experience with both aerospace and automotive high-voltage battery systems.
• Charging infrastructure design experience.
• Mechanical battery-pack design experience in addition to electrical design.

Responsibilities

• Drive battery-pack architecture and evaluate future battery cells.
• Develop and refine pack designs, including structure, materials, thermal paths, and tolerance analysis, and characterize packs on the bench.
• Drive BMS hardware architecture and specify required BMS firmware behavior, including failure behavior.
• Own charge control, including charger architecture, charge-rate strategy, and the throughput consequences of charging decisions.
• Lead battery safety analysis, test campaigns, and documentation, including UN 38.3 and IEC 62133.
• Perform hardware safety analysis, including worst-case circuit analysis, DFMEA, derating, thermal assessment, and protection coordination.
• Support Manufacturing, Quality, and Supply Chain through new product introduction and production ramp.
• Work hands-on at the bench, in the shop, on the flight line, and occasionally at customer sites to investigate deployed-system issues.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed