About the role

Radiant is seeking a Principal FPGA Engineer to serve as the technical authority for FPGA development across our Embedded Systems team. You will define the architecture methodology and standards governing FPGA design for a safety-critical instrumentation and control system responsible for real-time reactor control sensor and actuator handling and communications. This role operates at the intersection of deep technical ownership and organizational influence shaping how Radiant approaches FPGA development as we bring the first commercial microreactor to market.

Responsibilities and Duties:

• Define and own the overall FPGA architecture strategy across Radiants instrumentation and control systems ensuring designs scale with evolving product and regulatory requirements.

• Establish org-wide FPGA development standards toolchain selections and verification methodologies.

• Drive the most complex technical challenges timing closure at scale fault-tolerant design multi-domain clock architectures and set the precedent for how they are solved.

• Serve as the primary technical interface across Embedded Systems hardware software and systems engineering ensuring cohesive system-level design decisions.

• Lead architecture and design reviews setting the quality bar for RTL simulation synthesis and validation deliverables.

• Partner with engineering leadership to define hiring criteria and inform technical roadmap decisions.

• Mentor senior and mid-level FPGA engineers building long-term technical depth across the organization.

Required Skills and Qualifications:

• Bachelors degree in computer engineering electrical engineering or related field; advanced degree preferred.

• 10 years of progressive FPGA development experience with demonstrated impact at a principal or staff engineer level.

• Expert-level proficiency in VHDL SystemVerilog or equivalent HDL with a track record of setting team-wide design standards.

• Mastery of full-cycle FPGA development RTL architecture simulation synthesis timing closure and hardware bring-up across multiple platform generations.

• Deep experience with multi-clock domain design fault-tolerant architectures and safety-critical systems.

Desired Skills and Qualifications:

• Experience in regulated development environments including aerospace defense and manufacturing.

• Experience with the Microchip PolarFire SoC platform or comparable ecosystems.

• Proficiency with embedded C/C in FPGA/SoC contexts.

• Experience with formal or coverage-driven verification methodologies at scale.

• Familiarity with CI/CD pipelines applied to HDL workflows.

Benefits and Perks

• 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 and in-person camaraderie.

• Beautiful El Segundo headquarters close to the Pacific Ocean.

Total Compensation and Benefits
Radiant compensates people for impact and invests in those who continue to raise the bar. Radiants new hire compensation package includes base salary substantial equity grants and comprehensive health benefits. Total compensation and level are determined through a rigorous evaluation of interview performance experience education and qualifications and are designed to support continued growth as scope responsibility and impact expand at Radiant.

The best of todays advanced reactor builders dont wait for job postings. They join the winning team. If thats you contact us directly for immediate opportunities: .

We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race color religion sex sexual orientation gender identity or expression pregnancy age national origin disability status genetic information protected veteran status or any other characteristic protected by law.

Unfortunately we are unable to provide visa sponsorship at this time.

This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicants capacity to serve in compliance with U.S. export controls.

Required Experience:

Staff IC