Principal Electrical Engineer (Electronics)

Radiant; El Segundo (CA); On-site; USD 180,000 - 240,000; Full time

Benefits offered by this job

Equity

Medical coverage

Flexible PTO

Vision coverage

Dental coverage

HQ in El Segundo

Job summary

Radiant is seeking a Principal or Staff Electrical Engineer to define and lead the electrical architecture for Kaleidos, our commercial microreactor targeted for customer deployment in 2028. The role spans full-stack PCB development, mixed-signal design, high-speed interfaces, power distribution, and signal integrity for data acquisition and real-time processing essential to reactor control.

You will own board bring-up, debugging, and qualification plans, collaborate with firmware/FPGA and DSP

Qualifications

• Bachelor’s degree in Electrical Engineering or related field required.
• Experience shipping hardware from requirements through layout, bring-up and production.
• Familiarity with high-speed interfaces (SPI, I2C, UART, Ethernet) and layout constraints.

Responsibilities

• Bring up, debug, and validate hardware through board-level testing and instrumentation.
• Write and execute validation and qualification plans to prove performance and reliability.
• Lead design reviews and mentor electrical team members; own hardware risk mitigation.

Skills

Electrical architecture leadership

Signal integrity

Power integrity

High-speed interface design

Education

Bachelor’s degree in Electrical Engineering

Master’s degree in Electrical Engineering

Tools

Altium

Cadence

Job description

• Radiant is seeking a Principal or Staff Electrical Engineer to define and lead the electrical architecture for Kaleidos, our commercial microreactor targeted for customer deployment in 2028
• The work spans full-stack PCB development, mixed-signal design, high-speed interfaces, power distribution, and signal integrity to support the data acquisition, signal conditioning, and real-time processing that reactor control depends on
• You will serve as the technical lead for custom hardware, setting design standards, driving architecture decisions, and owning high-reliability, low-noise board development from requirements definition and schematic capture through
• Own the boards that control a fission reactor: multilayer mixed-signal designs for reactor control and instrumentation, terrestrial today with space applications ahead
• Define and own the electrical architecture strategy for mixed-signal systems: power distribution, analog front ends, and digital control interfaces
• Design low-noise analog front-end circuits and integrate them with ADC/DAC and digital subsystems
• Own schematic capture, component selection, and layout, including high-speed and precision routing for sensor interfaces, data acquisition paths, and communication buses, with focus on signal integrity, power integrity, grounding, and EMI/EMC mitigation
• Bring up, debug, and validate hardware hands-on through board-level testing, instrumentation, and root-cause analysis
• Write and execute the validation and qualification plans that prove performance, reliability, and environmental margin
• Work directly with firmware, FPGA, DSP, and responsible engineers at the hardware-software boundary
• Provide technical leadership and mentorship across the electrical team, lead design reviews, and own hardware risk identification and mitigation

Benefits

• Equity: Substantial incentive stock plan for all salaried employees
• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans
• Flexible PTO policy
• Vision: 100% coverage + 50% for dependents
• Voluntary Life, Accident, Hospital, Critical Illness, Commuter and FSA are offered as employee contributed benefits
• Dental: 100% coverage, orthodontia extra, 50% for dependent
• Beautiful El Segundo headquarters close to the Pacific Ocean
• Team-bonding company outings, happy hours and in-person camaraderie

• Solid command of signal integrity, power integrity, grounding strategies, and EMI/EMC mitigation
• Bachelor’s degree in Electrical Engineering or a related field
• Prior experience shipping hardware you designed, carried from requirements through layout, bring-up, and qualification into production or field deployment
• Hands-on experience with board bring-up, debugging, and lab instrumentation (oscilloscopes, spectrum analyzers, VNAs)
• Demonstrated experience setting electrical architecture direction and driving decisions across complex, multi-disciplinary programs
• Familiarity with high-speed interfaces (SPI, I2C, UART, Ethernet) and their layout constraints
• Strong experience with schematic capture and PCB layout tools (Altium, Cadence, or similar)
• 8+ years designing custom PCBs, including multilayer and mixed-signal boards
• Experience designing for high-reliability or harsh environments (nuclear, aerospace, defense, or industrial)
• Analog and mixed-signal design experience, including sensor interfaces, ADC/DAC integration, and low-noise practices
• Experience with power electronics or power distribution design
• Familiarity with nuclear instrumentation or detector interface electronics
• Exposure to FPGA or embedded systems supporting hardware/software co-design
• Master’s degree in Electrical Engineering or a related field
• Familiarity with radiation effects and radiation-tolerant electronics design
• Experience with DFM, DFT, and production bring-up