Electrical Engineer, Electronics Design

Mainspring Energy•Menlo Park, CA

4d•Hybrid

About The Position

Mainspring Energy is seeking a highly autonomous, intellectually curious, and influential Electrical Engineer, Electronics Design to join their core Electrical Engineering organization. This is a high-impact engineering position where you will take end-to-end ownership and act as the technical lead for the critical electrical hardware and PCBA designs that power their revolutionary Linear Generator. Working alongside a world-class team of multidisciplinary engineers, you will have the execution autonomy to design advanced low-voltage (< 60V) systems, spearhead complex hardware validation and technical reviews, and directly shape the future of their power generation control architecture. The Linear Generator relies on innovative electrical power and control hardware systems to achieve its best-in-class efficiency while meeting the world’s strictest emissions requirements. These electrical hardware systems are designed by a talented team of electrical engineers that own hardware design from initial concept through test and manufacturing. This role offers a high impact opportunity to shape the future of the Linear Generator’s electrical control hardware systems.

Requirements

2+ years of experience with a Bachelor's degree, or 1+ years of experience with a Master's degree, in Electrical Engineering or a related field
Proven hands-on experience designing, troubleshooting, and realizing low-voltage electrical hardware (e.g., DC/DC converters, relays, e-fuses, and MOSFETs)
Proficiency with PCBA schematic capture and PCB design tools (Altium strongly preferred)
Strong fundamentals in analog/mixed-signal design, including operational amplifiers, ADCs, and hardware filtering (anti-aliasing, bandpass, etc.)
Experience performing component derating analysis, worst-case tolerance stack-ups, and Design Failure Mode and Effects Analysis (DFMEA)
Demonstrated ability to drive projects forward from initial requirements through production
A "collaborate-first" mindset with strong communication skills across diverse technical teams and personalities

Nice To Haves

Experience in the full hardware development life cycle of PCBA’s and electrical assemblies, from requirements development to manufacturing support
Familiarity with hardware reliability and environmental validation testing (e.g., HALT, thermal chamber testing, Hipot, vibration)
Experience working in a startup or rapid product development environment
Familiarity with project management and documentation tools (e.g., Jira, Confluence)
Basic programming or scripting experience (Python, C, or C++) specifically for automating lab bench tests or debugging hardware

Responsibilities

Design low-voltage (< 60V) electrical systems and PCBAs that enable core functions and expand the capability of the Linear Generator
Own the full bring-up, validation, and qualification of your custom electrical hardware designs
Lead cross-functional design reviews to present concepts, align requirements, and secure approvals
Debug and troubleshoot complex hardware issues that arise across field deployments, test labs, and the production floor
Partner closely with reliability engineers to analyze hardware performance and continuously increase system robustness
Work directly with their New Product Introduction (NPI) team and external suppliers to optimize designs for manufacturability (DFM) and testability (DFT)
Interface with high-voltage hardware teams and define requirements for cabling and embedded firmware support
Learn complex design concepts and mentor peers while collaborating with a world-class engineering team