Senior Engineering, Test Engineering

We are on a mission to serve all humans equally by ensuring access to food, medicine and essential goods anytime, anywhere. Today, Zipline operates on four continents, makes a delivery somewhere in the world every 30 seconds, and has completed millions of deliveries to date, including blood, vaccines, medical supplies, food, and retail products. Our customers include the world’s largest and most prominent healthcare systems, governments, retailers, restaurants and global businesses who rely on us to save lives, reduce emissions, increase economic opportunity, and provide delivery from point A to point B as fast as possible. The drone is only 15% of what we’ve built to enable seamless, reliable, global operations.With more than 140 million commercial autonomous miles safely flown, Zipline is redefining access to healthcare, consumer products, and food across the globe.Our team is motivated by building systems that have a direct, meaningful impact on people’s lives and by scaling the future of logistics. About You and The RoleZipline’s aircraft rely on electric propulsion and actuation hardware that performs predictably in demanding conditions. As a Senior Motor Test Engineer, you will build the evidence behind that confidence by characterizing motors, propulsion systems, actuators, and propeller subassemblies in the lab and connecting results to flight and field performance.You will own performance and reliability test campaigns from specification through technical recommendation. Your work will inform design release, vehicle readiness, field reliability, model validation, and production-test decisions.What You'll DoConduct full electromechanical characterization of BLDC motors including loss characterization, thermal coefficient extraction, and demagnetization testingEvaluate propulsion systems (motor + inverter + propeller) for thrust, efficiency, and thermal behavior across the full operational envelopeTest servo and motor-based actuators for positional accuracy, losses, holding torque, and closed-loop dynamic responseDefine and own test specifications covering efficiency maps, thermal performance, torque-speed curves, cogging, back-EMF, and endurancePerform root cause analysis on field failures and correlate back to test data to close the loop between lab and flightOwn the full performance and reliability test campaign for your hardware - you are the go-to person to understand how a part will perform in the field, and when the hardware is pushed to its limits.Partner with mechanical, electrical, and firmware engineers to translate design intent into rigorous test requirementsWork with manufacturing to develop production test strategies that balance coverage, throughput, and costDevelop automated test scripts and data acquisition pipelines (Python, or equivalent)What You'll BringHands-on experience with electric motors and actuators, including efficiency characterization, losses evaluation, testing to evaluate electrical and thermal models. Hands-on experience with actuator performance and control system evaluation. Hands-on experience with structural and dynamics performance, including material testing, dynamic response, accelerometer and strain instrumentation. Experience building or improving test fixtures, dynamometers, thrust stands, instrumentation, or automated data-acquisition systems.Proficiency in Python or equivalent. Sound engineering judgment to connect test results to design decisions, model validation, reliability risks, and field performance.What Else You Need To KnowThe starting cash range for this role is $130,000 - $180,000. Please note that this is a target, starting cash range for a candidate who meets the minimum qualifications for this role. The final cash pay for this role will depend on a variety of factors, including a specific candidate's experience, qualifications, skills, working location, and projected impact. The total compensation package for this role may also include: equity compensation; discretionary annual or performance bonuses; benefits such as medical, dental and vision insurance; Zipline is an equal opportunity employer and prohibits discrimination and harassment of any type without regard to race, color, ancestry, national origin, religion or religious creed, mental or physical disability, medical condition, genetic information, sex (including pregnancy, childbirth, and related medical conditions), sexual orientation, gender identity, gender expression, age, marital status, military or veteran status, citizenship, or other characteristics protected by state, federal or local law or our other policies.We value diversity at Zipline and welcome applications from those who are traditionally underrepresented in tech.