Senior Electrical Engineer - PCB Design

About the Role

Radiant is seeking a Senior Electrical Engineer with a strong focus on PCB design to lead the electrical architecture for terrestrial reactor control systems, with a long-term path toward space reactor applications. You will serve as the technical authority for custom hardware, owning the design and development of high-reliability, low-noise printed circuit boards - from requirements definition and schematic capture through layout, bring‑up, validation, and field deployment.

This role emphasizes full-stack PCB development, including mixed-signal design, high-speed interfaces, power distribution, and signal integrity, while supporting data acquisition, signal conditioning, estimation, and real-time processing functions critical to reactor control.

• Own the design and development of multilayer PCBs for reactor control and instrumentation systems (terrestrial, with future space applications).

• Define electrical architecture for mixed‑signal systems, including power distribution, analog front ends, and digital control interfaces.

• Design low‑noise analog front‑end circuits and ensure robust integration with ADC/DAC and digital subsystems.

• Perform schematic capture, component selection, and PCB layout with focus on signal integrity, power integrity, grounding, and EMI/EMC mitigation.

• Develop and review high‑speed and precision layouts (e.g., sensor interfaces, data acquisition paths, communication buses).

• Bring up, debug, and validate hardware, including board‑level testing, instrumentation, and root‑cause analysis.

• Create and execute hardware validation and qualification test plans for performance, reliability, and environmental conditions.

• Collaborate cross‑functionally with firmware, FPGA, DSP, and responsible engineers to ensure seamless hardware/software integration.

• Bachelor’s degree in Electrical Engineering or a related field.

• 5+ years of experience designing custom PCBs, including multilayer and mixed‑signal boards.

• Strong experience with schematic capture and PCB layout tools (e.g., Altium, Cadence, or similar).

• Solid understanding of signal integrity, power integrity, grounding strategies, and EMI/EMC mitigation techniques.

• Experience with analog and mixed‑signal design, including sensor interfaces, ADC/DAC integration, and low‑noise design practices.

• Familiarity with high‑speed interfaces (e.g., SPI, I2C, UART, Ethernet) and layout constraints.

• Hands‑on experience with board bring‑up, debugging, and lab instrumentation (oscilloscopes, spectrum analyzers, VNAs, etc.).

• Ability to work across disciplines and support system integration in a complex engineering environment.

• Master’s degree in Electrical Engineering or a related field.

• Experience designing for high‑reliability or harsh environments (nuclear, aerospace, defense, or industrial).

• Familiarity with radiation effects and radiation‑tolerant electronics design.

• Experience with power electronics or power distribution design.

• Exposure to FPGA or embedded systems to support hardware/software co‑design.

• Familiarity with nuclear instrumentation or detector interface electronics.

• Experience with design for manufacturability (DFM), design for test (DFT), and production bring‑up.

• Must be willing to work extended hours and weekends as necessary to accomplish our mission

• Must work 100% onsite at El Segundo HQ

• Stock:
  Substantial incentive stock plan for all full‑time employees.

• Medical: 100% up to base silver level plan for employee + 50% dependents, offers up to Platinum plans.

• One Medical:
  Sponsored memberships for employees and their dependents.

• Vision: 100% top tier plan coverage + 50% for dependents.

• Dental: 100% top tier plan coverage, orthodontia extra, 50% for dependents.

• Voluntary life, accident, hospital, critical illness, commuter and FSA/HSA are offered as employee contributed benefits.

• 8‑weeks of paid parental leave for all parents. Additional paid pregnancy leave for CA employees.

• Daily catered lunch. Free snacks and drinks.

• Flexible PTO policy. Remote workday allocation.

• Company and team‑bonding events, happy hours…