About H-55

As the technological spin-off of Solar Impulse, the first electric airplane to fly around the world, the mission of H55, is to make aviation clean, safe, and affordable.

The company’s strengths and competencies lie in developing propulsion and energy storage solutions which are modular, lightweight, and certifiable.

Having integrated and flown 4 electric airplanes, the Swiss start-up has been selected by Pratt & Whitney Canada to provide the battery pack for its regional hybrid-electric flight demonstrator. This recent announcement is a further illustration of H55’s position as a major enabler in the electric commuter market.

About the role
In the frame of its product development (Energy Storage System), H55 is hiring an Electronics Hardware Engineer.
Within a multi-disciplinary team, you will be responsible for the Electronic Circuit Board (ECBA) Design, development and verification (V&V), with a focus on Energy Flow Counter (EFC) which is part of the Battery Management System (BMS). You will be part of Part-21J Design Organization (DO).

Specifically, you will be responsible to:

• Write the board Requirement Specification (V&V)
• Create board schematics (PCB) with :
  • Input protections and EMI / ESD filtering,
  • Mixed analog input/output interfaces (High/Low Voltage, current, temperature, measurements, …),
  • Digital interfaces (ICD...)
  • Communication Buses (CAN, RS485, RS232),
  • Microcontroller (MCU,...),
• Write Design documentation: Design Description, Design calculations and analysis …
• Perform board layout (components placement, Schematics (SCH), Drawings (DWG) and routing),
• Write Verification & Validation test procedures (QTP, VTP,...),
• Debug, Derisk, troubleshoot and integrate the board,
• Execute the formal tests and document them in a test report,
• Define the acceptance test procedure (ATP;...),
• Support the development of test benches,
• Maintain detailed and meticulous documentation throughout the entire process,
• Manage all data under your responsibility according to our DO-254 development methodologies and configuration management rules.

• Bachelor or Master’s degree in electronics engineering, preferably with CFC degree realized before
• 3-5 years of experience in the development of high reliability and/or safety-critical hardware (industrial, automotive, medical and/or aerospace),
• Pro-active & team player attitude are a key to the success
• Good knowledge of:
  • Mixed analog/digital circuit, power supply (DC/DC), protection and filtering,
  • Electronics Circuit calculations (tolerance/error analysis),
  • Circuit simulation (Simetrix or other Spice equivalent),
  • Proficiency in Schematics entry and circuit board layout (Altium Designer or another analogical tool),
  • Good knowledge of PCB IPC standards,
• EMI/EMC basic knowledge.

• Aerospace/Aviation process & standard knowledge is a plus (Under EASA/FAA CS-23),
• Notions in Thermal Engineering (cooling) and Mechanical Engineering (enclosure) is a plus,
• Matlab & Altium use is a plus,
• Experience of environmental testing (temperature, vibration, EMI/EMC, DO-160) and aviation development assurance standards (DO-254) is a plus,
• Fast learner, rigorous, with analytic problem-solving capabilities and ability to properly document,
• Well organized, capacity to prioritize,
• Fluency in English, French is a strong asset.

What we offer

• An amazing work Location in Sion, Valais in the heart of Swiss Alps.
• A highly dynamic and multicultural environment where you can grow and learn by working on ambitious challenges to shape the future of Electric Aviation.
• We offer a position which contributes to valuable and impactful work in a stimulating an international environment

Sounds interesting? We look forward to meeting you!

H55 is an equal opportunity employer and welcomes applications from all qualified individuals regardless of race, sex, disability, religion/belief, sexual orientation or age. All aspects of employment including the decision to hire, promote, discipline, or discharge, will be based on competence, performance, and business needs.