--- title: 'Principal Electrical Engineer, Electronics at Radiant Industries' canonical: 'https://feeny.ai/job/principal-electrical-engineer-electronics-radiant-industries-el-segundo-nesnqecsxagy' type: 'job' last_seen: '2026-11-09' --- # Principal Electrical Engineer, Electronics at Radiant Industries - **Company:** [Radiant Industries](https://feeny.ai/companies/radiant-industries) - **Location:** El Segundo, CA - **Compensation:** $201k–$314k - **Employment:** full-time - **Work type:** onsite - **Posted:** 2026-10-22 - **Last confirmed live:** 2026-11-09 - **Apply:** https://jobs.ashbyhq.com/radiant-industries/94fad2f9-3fde-41c1-be54-e707df10f940/application **Skills:** PCB Design, Multilayer PCB Layout, Mixed-Signal Design, Schematic Capture, Altium, Cadence, Signal Integrity, Power Integrity, EMIEEE 802.3, SPI, I2C, UART, Ethernet, Oscilloscopes, Spectrum Analyzers, VNA, Analog Front-End Design, ADC/DAC Integration, Low-Noise Design, Radiation Effects Design > The Principal Electrical Engineer leads the electrical architecture for terrestrial reactor control systems and defines standards for custom hardware. Responsibilities include multilayer PCB design, mixed-signal circuit development, and hardware validation within a startups environment. ## Job description ## About Radiant Radiant is an El Segundo, CA-based company building the world's only mass-produced, transportable nuclear microreactors. The U.S. grid is under growing strain, with power demand accelerating, driving higher utility costs, rising carbon emissions, and interconnection backlogs. Radiant has a solution, transportable, on-site power. Our first reactor, Kaleidos, is 1 megawatt: small enough to be factory-built, transported by land, sea, or air, and deployed wherever power is needed. 1 MW can power 1000 homes for five years. Ship it back and we refuel for a 20 year operating life. We made energy a product that can be used for critical infrastructure like military bases, data centers, hospitals, and remote sites, as well as the commercial main street businesses that keep America running. Founded in 2020, Radiant is under contract to deliver power to the U.S. Army, Navy and Air Force and has signed pre-order agreements with Equinix, with deployments beginning in 2028. ## About the Role 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 end-to-end PCB development, mixed-signal design, high-speed interfaces, power distribution, and signal integrity for the data acquisition, signal conditioning, and real-time processing that reactor control depends on. You will lead custom hardware, set design standards, drive architecture decisions, and own high-reliability, low-noise board development from requirements through layout, bring-up, validation, and field deployment. You will also shape the hardware roadmap and guide the electrical team’s technical direction as we scale toward first commercial deployments. Responsibilities & Duties: - Own the multilayer mixed-signal boards that control a fission reactor, terrestrial today with space applications ahead. - Define the system-level electrical architecture for mixed-signal systems: power distribution, analog front ends, and digital control interfaces. - Design, analyze, and simulate low-noise analog front ends and integrate them with ADC/DAC, DSP, and digital subsystems. - Own schematic capture, component selection, and layout, including high-speed and precision routing for sensor interfaces, data acquisition, and communication buses, with focus on signal integrity, power integrity, grounding, and EMI/EMC. - Bring up, debug, and validate hardware hands-on, and write and execute the qualification plans that prove performance, reliability, and environmental margin. - Work directly with firmware, FPGA, and DSP engineers at the hardware-software boundary, and with customers and interdisciplinary teams. - Lead design reviews, mentor the electrical team, and own hardware risk identification and mitigation. Required Qualifications & Skills: - Bachelor’s degree in Electrical Engineering or a related field. - 8+ years designing custom multilayer and mixed-signal PCBs. - Experience shipping hardware you designed, with ownership across most of the lifecycle, from requirements through layout, bring-up, and qualification for production or field use. - Demonstrated experience setting electrical architecture direction and driving decisions across complex, multi-disciplinary programs and with customers. - System-level perspective across design analysis, fabrication, and testing. - DSP experience applied to data acquisition and real-time signal processing. - Circuit analysis and simulation experience (PSpice, LTspice). - Strong schematic capture and PCB layout experience (Altium Designer, Cadence, or similar), including component selection. - Strong command of signal integrity, power integrity, and grounding. - Analog and mixed-signal design experience, including sensor interfaces, ADC/DAC integration, and low-noise practices. - Familiarity with high-speed interfaces (SPI, I2C, UART, Ethernet) and their layout constraints. - Hands-on board bring-up, troubleshooting, and lab instrumentation (oscilloscopes, spectrum analyzers, VNAs). - EMI/EMC mitigation experience. - Experience designing for high-reliability or harsh environments (nuclear, aerospace, defense, or industrial). Desired Qualifications & Skills: - Master’s degree in Electrical Engineering or a related field. - Radiation effects and radiation-tolerant electronics design. - Power electronics or power distribution design. - FPGA or embedded systems exposure supporting hardware/software co-design. - Nuclear instrumentation or detector interface electronics. - DFM, DFT, and production bring-up experience. Additional Requirements: - Must be willing to work extended hours and weekends as necessary to accomplish our mission. - Must work 100% onsite at El Segundo HQ. ## 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. - Nuclear Engineering Certificate Program: 100% covered educational program with Penn State University, for eligible employees, to rapidly upscale into nuclear. - 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. Radiant’s full-time 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 today’s advanced reactor builders don’t wait for job postings. They join the winning team. If that’s you, contact us directly for immediate opportunities: recruiting@radiantnuclear.com. 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. This position involves access to technology that is subject to U.S. export controls. Any job offer made will be contingent upon the applicant’s capacity to serve in compliance with U.S. export controls. ## About Radiant Industries ## Company Overview - **One-liner**: Radiant Industries is building the world’s first mass‑produced, portable nuclear microreactor (Kaleidos) to replace diesel generators with zero‑emission, resilient power for remote sites, hospitals, data centers, and military installations. - **Entity Type**: Private (Series D – $300M raised in December 2025, led by Lockheed Martin Ventures) - **Headquarters**: El Segundo, California, USA - **Founded**: 2020 (some sources list 2019) - **Founders**: Not publicly disclosed ## Core Business - **Primary industry**: Nuclear electric power generation / clean energy - **Target customers**: B2B – remote communities, hospitals, data centers, military bases, industrial sites that currently rely on diesel generators or unstable grids - **Mission**: To bring one of the world’s first factory‑constructed microreactors to market, providing portable, zero‑emissions power anywhere, anytime. ## Products & Services - **[Kaleidos Microreactor](https://www.radiantnuclear.com/)**: A 1 MW electric / 1.9 MW thermal portable nuclear reactor packaged in a shipping container. It uses helium gas cooling and TRISO fuel (meltdown‑proof ceramic uranium particles). Delivered by truck or aircraft, installed without site excavation, and can reach full power the next day. After 5+ years the entire container is returned to the factory for refueling; up to four fuel cycles yield a 20‑year product lifetime. Customers purchase via Power Purchase Agreements (PPAs) or direct unit sales. ## Market Standing - **Valuation / Market Cap**: Not disclosed - **Key Metric**: Total funding raised – **$622.6M** (as of early 2026) - **Notable Investors/Partners**: Andreessen Horowitz (led Series B), Lockheed Martin Ventures (led Series D), plus 18+ other investors across Series B, C, and D rounds - **Growth Signals**: - Headcount grew **141% YoY** to 157 employees (as of mid‑2026) - 64 active job postings (+178% YoY) - Plans to test its development reactor in **2026** – which would be the first new commercial reactor design to achieve a fueled test in over 50 years - Initial customer deployments targeted for **2028** - SBIR Phase II awards from the U.S. Air Force for nuclear microreactor installation energy resilience ## Competitive Advantages - **Portability & speed**: Delivered in a standard shipping container, installed in one day, no on‑site water or excavation needed. - **Passive safety**: TRISO fuel is meltdown‑proof; the core is cooled by natural convection (air jacket) without pumps. - **Factory‑built, factory‑refueled**: No nuclear waste or infrastructure left on site after the container is returned. - **High energy density**: Over 110× the energy density of existing diesel systems. - **Fleet monitoring**: Hundreds of units can be monitored 24/7 from a centralized control center. ## Strategic Focus - Complete fueled testing of the Kaleidos prototype in 2026. - Secure regulatory approvals (special nuclear material license, Part 7 license). - Scale manufacturing for initial customer deployments beginning in 2028. - Expand into military, commercial, and humanitarian markets (disaster relief, remote microgrids, backup power). ## Why Work Here - **Culture & mission**: High‑impact climate tech – directly replacing diesel generators with clean nuclear power. Rated 5.0/5.0 on employer reviews (5 reviews) with strong scores for culture (4.7) and career growth (4.8). - **Work location**: On‑site in El Segundo, CA (steps from the Pacific Ocean, near downtown). Employees work from a physical office. - **Perks**: Company equity, relocation assistance, free daily meals, commuter benefits, onsite parking, generous parental leave, family medical leave, onsite Mother’s Room, dental/health insurance, FSA. - **Diversity & inclusion**: Mandated unconscious bias training; hiring practices that promote diversity. - **Tech stack**: React, TypeScript, Python, C++, C#, Kubernetes, Docker, PostgreSQL, AWS, Ansys, SolidWorks, Altium, and more. Engineers work on cutting‑edge nuclear, mechanical, and embedded systems. - **Growth trajectory**: 141% headcount growth in the past year; 64 open roles across engineering, regulatory, supply chain, and operations. ## Sources 1. [radiantnuclear.com](https://www.radiantnuclear.com/) – Product details, specs, deployment model 2. [builtin.com](https://builtin.com/company/radiant) – Company overview, perks, culture, tech stack, reviews 3. [linkedin.com](https://www.linkedin.com/company/r-a-d-i-a-n-t) – Funding, headcount, employee growth, locations, key executives 4. [sbir.gov](https://www.sbir.gov/portfolio/1655711) – SBIR awards, Phase II contracts with U.S. Air Force 5. [jobs.ashbyhq.com](https://jobs.ashbyhq.com/radiant-industries) – Current open positions (64+) ## Other roles at Radiant Industries - [Senior Build Engineer, Turbomachinery](https://feeny.ai/job/senior-build-engineer-turbomachinery-radiant-industries-el-segundo-m5wssr3vpxve) — El Segundo, CA - [Staff Nuclear Engineer](https://feeny.ai/job/staff-nuclear-engineer-radiant-industries-el-segundo-yx5h3evqz8w6) — El Segundo, CA - [Program Development Lead](https://feeny.ai/job/program-development-lead-radiant-industries-el-segundo-dat68x1gvag2) — El Segundo, CA - [Senior Operations Associate](https://feeny.ai/job/senior-operations-associate-radiant-industries-el-segundo-tyvmyj7b34nr) — El Segundo, CA - [Principal Thermal Modeling Engineer](https://feeny.ai/job/principal-thermal-modeling-engineer-radiant-industries-el-segundo-9kfh14wgzf1p) — El Segundo, CA - [Principal Turbomachinery Engineer](https://feeny.ai/job/principal-turbomachinery-engineer-radiant-industries-el-segundo-t79km8ymbgam) — El Segundo, CA - [Site Lead](https://feeny.ai/job/site-lead-radiant-industries-el-segundo-s3eqh34jwg06) — El Segundo, CA - [Staff Regulatory Engineer](https://feeny.ai/job/staff-regulatory-engineer-radiant-industries-el-segundo-bsm92yhympbx) — El Segundo, CA - [Senior Regulatory Engineer](https://feeny.ai/job/senior-regulatory-engineer-radiant-industries-el-segundo-nr50jybcam8n) — El Segundo, CA - [Director of Regulatory Affairs](https://feeny.ai/job/director-of-regulatory-affairs-radiant-industries-washington-zcqq77x6texk) — Washington, DC