Senior Electrical Engineer

Company Overview

Reflex Robotics builds general‑purpose, AI‑powered humanoid robots for the toughest jobs in industry. We focus on work that is genuinely hard on the human body—lifting 40‑pound bags of dog food, loading boxes for an entire shift, and moving heavy materials from floor to high overhead shelves. Our robots need strength, reach, precision, speed, and battery life to be useful across multiple shifts, delivering a clear return today. The robot costs $32K at development volumes. We build the full robot stack ourselves—from cameras and compute to actuators, electronics, and software—and provide a custom supervision stack that handles floor variability and keeps work moving without line disruption. Reflex is a four‑year‑old startup backed by Khosla Ventures and other investors, with a team of alumni from Anduril, Oculus, Amazon, Waymo, Skydio, Boston Dynamics, ASML, MIT, Jane Street, and Joby Aviation.

Key Company Beliefs

• We are obsessed with shipping robots; a humanoid robot is only valuable if it solves a real customer problem.
• Cool demos are fun, but reliable work is what matters.
• Low cost is essential for widespread deployment.
• High‑quality, proprietary robotics data is the foundation of the next generation of physical AI.
• Getting nerd‑sniped by an engineering metric is less important than solving our customers’ biggest pain points.

What We’re Looking For

We develop custom servo actuators, compute, networking, cameras, sensors, and power electronics for our robots. These systems must be performant, reliable, cost‑effective, and tightly integrated with the rest of the robot. We are seeking a senior electrical engineer to own the robot’s power electronics and power distribution architecture, including the battery management system, bus voltage switching, e‑stop integration, pre‑charge, cabling, motor inverters, and EMI mitigation. The role involves defining requirements, making system‑level architecture decisions, and taking designs from concept through bring‑up, testing, and deployment. You will work closely with junior engineers and external layout resources to execute designs.

• Miniaturizing motor drives by reducing bus capacitance and switching‑stage size without sacrificing efficiency or creating EMI problems.
• Designing the power‑system safety architecture, including safe startup, shutdown, fault handling, and battery hot‑swapping.
• Designing and validating a custom battery management system.
• Improving motor inverter performance, reliability, thermal performance, and packaging.
• Diagnosing and mitigating conducted and radiated EMI across the robot.

Required Qualifications

• Strong electrical engineering fundamentals.
• Deep experience designing power electronics systems, ideally in the ~48 V range.
• Experience with motor inverters, motor drives, or similar high‑current switching systems.
• Strong PCB design, board bring‑up, test, and debug skills.
• Comfortable debugging power electronics with scopes, power supplies, current probes, and other lab equipment.
• Strong understanding of system‑level tradeoffs across electrical, firmware, mechanical, thermal, and cost constraints.
• Ability to independently define technical requirements and make architecture and design decisions.
• Experience taking complex electrical designs from concept through prototype and validation.
• Strong communication skills and ability to lead technical work across multiple contributors.
• BS or higher in Electrical Engineering or a related field.

Bonus Qualifications

• Experience with low‑voltage power electronics for robotics, electric aircraft, EV subsystems, industrial automation, or servo systems.
• Motor physics and motor control experience.
• Control systems or stability analysis experience.
• Battery management system design.
• Power‑system safety architecture, including pre‑charge, e‑fuses, contactors, and e‑stop systems.
• EMI/EMC design and mitigation for switching power systems.
• Experience designing for battery hot‑swap systems.
• Experience managing PCB layout contractors or other external engineering resources.
• Experience with DFM, supply‑chain considerations, test coverage, and production bring‑up.
• Proficiency in Altium for schematic capture and PCB layout.
• Cross‑disciplinary experience with firmware, embedded systems, or mechanical design.
• Experience managing or mentoring junior engineers.
• Robotics experience.

Compensation

$180,000–$250,000, depending on experience, skills, and qualifications.