Senior Electrical Engineer

About Urban Sky:  Urban Sky is a venture-backed aerospace startup that pioneers utilization of the stratosphere and reimagines the way humans view and analyze the earth. We design, build, operate, and sell stratospheric balloon systems, and the data we collect supports a wide range of applications, from real-time wildfire monitoring to urban mapping. Our technology is also employed by government customers including the Department of Defense (DoD), NASA, and others. Urban Sky sends flight vehicles to the stratosphere on a weekly basis.  Our team consists of engineers, makers, developers, and doers who believe in the power of human potential when passion meets utility within a small, supportive team. At Urban Sky we strive to create a team culture grounded in candor, inclusion, respect and empowerment.  We aim to build the next chapter of stratospheric history in Denver and are seeking self-starting, open-minded, and hard-working team members. About The Role:  The Senior Electrical Engineer is a hands-on technical leader responsible for the architecture, design, and validation of electrical systems for the Super Pressure Balloon project, including flight avionics, power distribution, battery/solar energy systems, CAN/RS-485 networks, satellite communications, sensor interfaces, motor/winch control electronics, and termination/cutter circuits. This role will develop design solutions that operate reliably in the stratospheric environment and support long-duration, altitude-controlled flight, rapid ground and flight test iteration, and transition from prototype builds to repeatable flight hardware. This is a highly cross-functional role that touches bus avionics, Super Pressure flight electronics, motor control, and distributed power, BMS/charge controllers, pressure sensing, GPS/satcom, winch electronics, and ground/acceptance-test equipment - amongst a growing set of electronic applications. Beyond owning design, you will mentor engineers on the Super Pressure electrical and integration team, drive rigorous board checkout and validation processes, and engage directly with flight operations, manufacturing, systems engineering, and customer/program stakeholders to translate mission feedback into the next generation of hardware. Key Responsibilities:  Develop mature electrical design solutions that are manufacturable at scale and qualified to operate reliably in the stratospheric environment (low pressure, wide thermal excursions, radiation, thermal vacuum considerations) and the specific Super Pressure mission environment, including long-duration power constraints, autonomous recovery from fault modes, and field-maintainable flight hardware. Own architecture and design of electrical systems spanning Super Pressure flight avionics, distributed power, battery packs/BMS, solar charging, downstream DC/DC conversion, CAN/RS-485 networking, satellite communications, GPS/GNSS, pressure/temperature sensing, winch/motor control...