Principal Power Electronics Engineer in Farnham, United Kingdom

The role of Principal Power Electronics Engineer is key in the development of the electronics within

the in-wheel motor range, throughout the entire lifecycle of the products. With ownership of power electronics development, you will lead the end-to-end delivery of EV traction power electronics systems, providing technical leadership across multidisciplinary engineering teams from concept definition through production launch.

Key Responsibilities
Responsibilities include, although are not limited to the following:

1. Key Ownership

Ownership of the power electronics development, technical strategy and influences on roadmap

Accountable for achievement of efficiency, power density, reliability, and performance targets

Technical risk identification and mitigation

Mentoring and coaching senior and junior engineers

Supporting industrialisation from concept through high-volume production

2. Key Design Responsibilities

Drive the end-to-end development of EV traction inverter systems (50 kW to 300 kW, 400 V/800 V

platforms), providing technical leadership across multidisciplinary engineering teams from concept

through production launch.

Drive the design and review inverter power stages using IGBT and/or SiC MOSFET technologies.

Drive the power semiconductor characterisation and integration with gate drivers.

Key design decisions, and technical trade-offs (efficiency, cost, power density, reliability)

Specify and develop gate drive circuits, SMPS circuit, DC-link, current/voltage sensing, and

Perform detailed electrical, thermal and electromagnetics simulations (SPICE, PLECS, FEA).

Analyse switching losses, conduction losses, short‑circuit behaviour, and fault responses.

4. Thermal & Mechanical Integration

Collaborate with mechanical teams to define thermal architecture and conduct thermal design.

Ensure power semiconductor junction temperature targets and lifetime models are met.

5. Validation & Testing

Lead prototypes bring‑up, hardware debugging, and root‑cause failure analysis.

Define and execute DV / PV test plans (electrical, thermal, environmental).

Support EMC/EMI troubleshooting and compliance testing.

6. Safety Compliance

Support inverter development in accordance with ISO 26262 and automotive safety processes.

Ensure proper creepage, clearance, and insulation coordination in line with automotive HV safety standards

7. Cross‑Functional & Supplier Collaboration

Work closely with controls/software, motor, mechanical, vehicle integration, manufacturing, and quality teams.

Lead or support technical discussions with Tier‑2 suppliers and external partners.

Support sourcing decisions, cost optimization, and design reviews.

Control electronics and EMC responsibility when project requires

8. Production & Quality Support

Support design for manufacturability (DFM) and design for test (DFT).

Support production launch, field issues, and continuous improvement activities.

We value and measure ourselves against the following ‘Best-Self’ Behaviours:

Will to Win: we succeed by delivering to customers; on time, on quality, and on cost

Pioneering: we are passionate about the technology

Working Together: we can rely on each other, and others can rely on us

Personally Responsible: we do what needs doing, when it needs doing

With Integrity: we are honest, open and respectful

Successful candidates should be able to demonstrate the following relevant skills and behaviours:

Exercise discretion and independent judgment in the performance of duties set out above

Ability to communicate verbally and through technical documentation in English

Exhibit sound interpersonal skills including interfacing, coordinating and negotiating with company personnel, customers and suppliers

Utilise computer skills to prepare and review appropriate reports and documents

Make decisions using sound judgment while complying with policies, procedures, appropriate principles and applicable laws and regulations

Ability to self-motivate and work with minimal oversight

Candidates should assess their suitability against the following essential and/or desirable relevant

knowledge and experience:

Master’s degree in Power Electronic Engineering or other relevant subjects

A minimum of 8 years’ experience in R&D of inverters for electric motors

Practical experience of design, test and evaluation of 400V+ high voltage and 50kW to 300kW

Solid SiC / GaN and gate driver application and integration knowledge

Strong Electrical, thermal or electromagnetics modelling and simulation

Multiple journeys through complete development life cycles

Practical PCBA schematic and layout software experience

Knowledge of Insulation Coordination

EMC design, verification and troubleshooting

Electromagnetic FEA simulation experience

Familiarity with relevant automotive legislation, standards and guidelines

Understanding of motor control and sensors

Calculation of component stress & de-rating and reliability estimation

Design for functional safety to ISO26262

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