Power Supply System Development Engineer


Sapienza is recruiting a Power Supply System Development Engineer to be based in Tokyo, Japan. As a power supply system development engineer for small satellites, you will be engaged in our small satellite development work as a person in charge of power supply system design, power balance analysis, power supply circuit design and operation verification and evaluation.

Responsibilities of the Power Supply System Development Engineer

  • Power balance analysis
  • Implementation of a design that can meet the power requirements from the beginning to the end of the launch (in consideration of equipment deterioration and changes in power generation due to orbits)
  • Perform sizing of solar cells and batteries
  • Regularly update and manage power consumption information according to development progress
  • Power supply system design
  • Power distribution function and generation volume required for each development and operation phase
  • Design of power generation / distribution system considering efficiency to realize it
  • Dropping into the schematic of the various circuit functions that make up the power generation and distribution system
  • Development of battery charging circuit, regulator circuit and power distribution circuit
  • Conduct circuit design, design of substrate, commissioning of manufacturing of substrate, management, evaluation of substrate
  • Implementation of exhaust heat design (How to attach a substrate for exhaust heat to a satellite, etc. Adjustment with heat / structural system)
  • Selection of power supply components
  • Selection of battery modules (capacity, life, safety), procurement, evaluation
  • Selection of photovoltaic cells, assembly manufacture / consignment, evaluation
  • Regularly investigate trends in new element technologies, and consider recruitment and verification
  • Implementation of improvement of legacy system and development study of new system
  • Work closely with other engineering teams, partners and vendors for power system quality security

Profile of the Power Supply System Development Engineer

  • Education: University or higher, Bachelor’s degree in the field of science and engineering
  • More than 3 years of power supply circuit or analog circuit, or experience of multiple development cycles
  • Have experience in designing or instructing artwork for power circuits
  • Knowledge of satellite orbit and attitude, power system
  • Work experience related to satellite development or operation


  • Have knowledge about solar cells
  • Have knowledge about lithium-ion batteries
  • Have experience in system design and evaluation for charging and discharging the system using secondary battery (no matter what kind of CAD is used in circuit design, have at least 3 years’ experience in design and evaluation) )
  • Have experience in EMC evaluation and its measures
  • Software development experience in C ++ or Python and similar languages
  • Have an English level above business level and speaks >intermediate Japanese

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