---
title: 'Senior Electrical Engineer at Endurance Energy'
canonical: 'https://feeny.ai/job/senior-electrical-engineer-endurance-energy-seattle-h63epfa9rg56'
type: 'job'
last_seen: '2026-10-15'
---

# Senior Electrical Engineer at Endurance Energy

- **Company:** Endurance Energy
- **Location:** Seattle, WA
- **Compensation:** $200k–$250k
- **Employment:** full-time
- **Work type:** onsite
- **Posted:** 2026-06-16
- **Last confirmed live:** 2026-10-15
- **Apply:** https://jobs.ashbyhq.com/endurance-energy/b91983f9-4c5c-4c15-b2ac-0750bedbef41/application

**Skills:** Embedded Systems, Microcontroller Design, Embedded Linux, Analog Signal Processing, Low-Voltage Power Distribution, Communication Protocols, Ethernet, Fiber Optic, RS-485, CAN, SPI, I2C, Battery Management Systems, Harness Drawing, Fault Tolerance, Root Cause Analysis, Schematic Capture, Layout Review, Oscilloscopes, Analyzers

> Architect, design, and validate low-voltage control and instrumentation systems for subsea geothermal power plants. Responsibilities include embedded hardware selection, analog front-end design, communication system integration, and full hardware lifecycle management from lab validation to field performance.

## Job description

## About Endurance

Endurance is building the world's first modular subsea geothermal power plants, converting vast thermal resources under the ocean into gigawatts of baseload power. Backed by Founders Fund, Felicis, First Round Capital, and Point72 Ventures, our founding team includes veterans from SpaceX, Helion, Blue Origin, and Apple. We have completed multiple deep-ocean deployments to subsea volcanoes and are launching a long-term demonstration project this fall. By leveraging modular design, manufacturing scale, efficient drilling, and latent cooling on the seafloor, we are pioneering a new category of energy that outperforms traditional sources on environmental impact, deployment speed, and cost.

## What you'll be doing

As a Senior Electrical Engineer, you will architect, design, and validate the low-voltage control and instrumentation systems that enable subsea energy generation. You will be responsible for the full embedded electrical stack including microcontroller and embedded Linux platforms, analog sensor interfaces, battery management system integration, communication systems, wiring harness design, and fault-tolerant system architecture.

You will blend broad hands-on hardware experience with the discipline to build for extreme environments. This is not a simulation-only role. We are looking for someone who has personally selected components, designed analog front ends, brought up embedded boards in the lab, debugged intermittent failures, and driven designs through revision cycles into production. You understand the difference between a board that passes validation and a system running unattended in a harsh subsea environment.

You will own the full hardware lifecycle from architecture and schematic capture through layout review, fabrication, bring-up, validation testing, design iteration, and field performance analysis. You will work cross-functionally with mechanical, controls, power/subsea systems, and offshore operations teams to ensure our control systems are robust, fault-tolerant, and built to last.

## Key Responsibilities

- Architect and design low-voltage control and instrumentation systems from sensor interfaces through communication links and system supervisory logic
- Select and implement microcontrollers and embedded Linux processors appropriate for subsea control applications
- Design analog sensor front ends for pressure, temperature, flow, and shaft speed including signal conditioning, filtering, and ADC interfacing
- Integrate battery management systems and design low-voltage power distribution for control electronics
- Architect and implement communication systems including Ethernet, fiber optic, and serial protocols for subsea-to-surface data links
- Produce electrical harness drawings and coordinate with manufacturing of cable assemblies, connectors, and harness fabrication
- Define and implement fault-tolerant design strategies including redundancy, watchdog supervision, fault detection, and graceful degradation for non-retrievable deployments
- Develop fault trees and failure containment strategies to prevent single-point failures from taking down critical monitoring or control functions
- Lead board bring-up, lab validation, and system-level testing including sensor accuracy characterization, communication link validation, and fault injection
- Drive root cause investigations for sensor dropouts, communication failures, firmware faults, connector failures, and field anomalies
- Own the full system lifecycle including fabrication release, vendor and CM coordination, revision control, and production readiness
- Integrate control hardware cleanly with power systems, firmware, mechanical enclosures, and offshore operations
- Establish electrical design standards, documentation discipline, and reliability practices appropriate for subsea infrastructure

## Qualifications

- 6+ years of experience designing and shipping embedded or mixed-signal hardware in demanding or high-reliability environments
- Generalist hardware instincts — comfortable across microcontrollers, analog signal chains, low-voltage power, and digital communications
- Demonstrated experience architecting complete embedded systems, not just individual boards or subcircuits
- Hands-on experience designing analog sensor front ends including signal conditioning, filtering, and precision measurement
- Working knowledge of communication protocols and physical layers including Ethernet, fiber optic, RS-485, CAN, and SPI/I2C
- Experience with battery management systems or low-voltage DC power distribution for electronics
- Ability to produce harness drawings and work directly with CM or contract manufacturers on cable and connector selection
- Hands-on lab experience bringing up embedded hardware, debugging with oscilloscopes and analyzers, and iterating through revision cycles
- Experience designing for harsh environments — thermal, mechanical, or corrosion constraints — with appropriate material and connector selection
- Ability to think from first principles and make sound engineering tradeoffs under schedule pressure
- High ownership mentality and comfort being the single-threaded owner of a critical embedded system
- Strong cross-disciplinary communication skills and ability to collaborate with mechanical, power systems, subsea, and offshore operations teams
- Entrepreneurial mindset and willingness to operate in ambiguity while building a new class of energy infrastructure

## Preferred Experience

- Prior subsea, marine, or offshore hardware experience
- Background in aerospace, robotics, or medical device hardware development

Compensation, Benefits, & Perks As a pre-revenue startup, Endurance Energy offers competitive base salaries and generous equity packages for full-time employees. Final base salary will be determined by an array of factors including internal equity, job-related knowledge, skills, and work experience. A key aspect of our compensation philosophy is that value creation should be aligned with rewards. Right now this means equity is a significant portion of every full-time employee's compensation. As the company matures, there will be continued evolution and changes to the total rewards and total compensation package. What will always be true is that if we win, we win together. Equity is granted to every full-time employee as a meaningful piece of ownership. We believe the people building the company should share directly in the value they create. In addition to a competitive base salary and equity, employees will receive all of our other great benefits and perks, including:

- Benefits: Health, Dental, and Vision insurance coverage
- Time Away: Flexible PTO including 12 paid company holidays
- Global Fieldwork: Travel to fascinating deployment sites along oceanic ridges in locations like the Pacific Northwest, Hawaii, Iceland, Japan, New Zealand, and the Azores
- Hands-on Experience: Participate in sea trials and deployment operations in partnership with leading oceanographic institutions
- Cutting-edge Development: Work with technology that spans high-power electronics, marine systems, and clean energy
- Impactful Work: Help solve one of the world's most pressing challenges
- Dive Certification: Company-sponsored recreational dive certification
- Other Perks: Access to the company boat, free meals and snacks, and the list goes on!

If you’re selected for consideration, a recruiter will be able to discuss in greater detail.

## About Endurance Energy

## Company Overview
- **One-liner**: Develops subsea geothermal power systems that harvest heat from deep-ocean volcanic and hydrothermal environments to generate always-on, zero‑emission baseload electricity.
- **Entity Type**: Private (Series A)
- **Headquarters**: Seattle, Washington, United States
- **Founded**: 2025
- **Founders**: Andrew Redd (former SpaceX engineer on Dragon and Starship programs)

## Core Business
- **Primary Industry**: Renewable energy – subsea geothermal electric power generation.
- **Target Customers**: B2B / B2G – AI infrastructure, hyperscale data centers, industrial electrification, advanced manufacturing, and island/coastal communities seeking reliable, off‑grid clean power.
- **Mission/Purpose**: To unlock the largest untapped energy resource on Earth – subsea volcanic heat – and deliver gigawatt‑scale, carbon‑free baseload power to the grid.

## Products & Services
- **Subsea Geothermal Generators (Core Platform)** – Integrated offshore drilling, subsea infrastructure, power generation equipment, and cable‑based delivery units designed to operate directly on the seafloor.  
- **Adelie (Planned 100 kW System)** – A fully integrated deployable platform combining drilling, generation, and power offtake. Scheduled for deployment at the Juan de Fuca Ridge to power a co‑located subsea compute module and connect to shore via fiber‑optic cable.  
- **Prototype Deployments** – Four completed deep‑sea missions (Juan de Fuca Ridge, Lau Basin near Tonga) at depths up to 3,300 m and temperatures up to 386 °C, including a wellhead prototype and hydrothermal vent data collection.

## Market Standing
- **Valuation / Market Cap**: Not disclosed (private company).
- **Key Metric (Funding)**: $54 M Series A raised in 2026.
- **Notable Investors/Partners**: Founders Fund (lead), Ascend, Construct Capital, Felicis Ventures, First Round Capital, Point72 Ventures, Riot Ventures, Voyager Ventures. Also announced partnership with the Kingdom of Tonga.
- **Growth Signals**:  
  - Headcount grew 466.7 % YoY (16 employees as of mid‑2026).
  - 1,952 LinkedIn followers (+15.4 % monthly).
  - 14+ active open positions across engineering, manufacturing, geology, and recruiting.
  - Talent drawn from SpaceX (5+), Helion, Blue Origin, and other hard‑tech leaders.

## Competitive Advantages
- **First‑of‑Kind Subsea Geothermal Technology** – Only venture‑backed company systematically developing hardware for deep‑ocean hydrothermal power generation.
- **Proven Hardware Survivability** – Four successful deep‑sea deployments at extreme depths (3,300 m) and temperatures (386 °C), demonstrating engineering rigor unmatched by most early‑stage energy startups.
- **Always‑On Baseload Clean Energy** – Unlike solar/wind, subsea geothermal delivers continuous 24/7 output regardless of weather, making it a true baseload renewable source.
- **Founding Team DNA** – Led by SpaceX veterans who bring rapid iterative development, high‑performance engineering culture, and experience in extreme environment systems (Dragon, Starship).

## Strategic Focus
- **Immediate Milestone**: Deploy **Adelie** – the first fully integrated 100 kW subsea geothermal system – at the Juan de Fuca Ridge, co‑located with a subsea compute module.
- **Scaling Path**: Prove modular architecture to enable gigawatt‑scale installations at volcanic hotspots worldwide, with a focus on the Pacific Ring of Fire.
- **Market Alignment**: Capitalize on surging electricity demand from AI, data centers, and industrial electrification by offering a reliable, zero‑emission baseload source.

## Why Work Here
- **Hands‑On Engineering** – All roles are onsite (Seattle, WA and Boulder, CO). Engineers build, deploy, and test hardware in real ocean environments.
- **Fast‑Paced, High‑Impact Culture** – Described as a “high‑performance” team that moves quickly, with four hardware deployments in 15 months.
- **Unique Perks** – Company‑sponsored advanced scuba certification for all employees to build intuition for subsea operations.
- **Open Roles (14+)** – Active hiring in mechanical engineering, fluids/integration, welding, electronics, geology, supply chain, manufacturing, recruiting, and environmental specialist positions.
- **Founding‑Stage Energy** – Small, growing team (16 people) with direct access to leadership; opportunities to define systems from the ground up.

## Sources
1. [Endurance Energy Website](https://www.enduranceenergy.com/)
2. [LinkedIn Company Profile](https://www.linkedin.com/company/enduranceenergy)
3. [DevCuration – Series A Announcement](https://devcuration.com/articles/endurance-energy-raises-54m-series-a-to-build-deep-ocean-geothermal-power-systems)
4. [Jobera Career Page](https://jobera.com/employer/endurance-energy/)
5. [SignalHire Company Profile](https://www.signalhire.com/companies/endurance-energy)

## Other roles at Endurance Energy

- [Principal Geologist](https://feeny.ai/job/principal-geologist-endurance-energy-seattle-zjhg0ndn3vdr) — Seattle, WA
- [Senior/Principal Software Engineer](https://feeny.ai/job/senior-principal-software-engineer-endurance-energy-seattle-mj2yn20svgq1) — Seattle, WA
- [Chief of Staff, Office of the CEO](https://feeny.ai/job/chief-of-staff-office-of-the-ceo-endurance-energy-seattle-qm5tg5zee0zz) — Seattle, WA
- [Cable Harness Specialist](https://feeny.ai/job/cable-harness-specialist-endurance-energy-seattle-pbp19xb106pc) — Seattle, WA
- [CNC Machinist/Programmer](https://feeny.ai/job/cnc-machinist-programmer-endurance-energy-seattle-r0c9052n4xmp) — Seattle, WA
- [Policy and Operations Manager](https://feeny.ai/job/policy-and-operations-manager-endurance-energy-washington-tv53yk4m613h) — Washington, DC
- [Senior/Principal Turbomachinery Engineer](https://feeny.ai/job/senior-principal-turbomachinery-engineer-endurance-energy-seattle-yqxvxd109z3w) — Seattle, WA
- [Global Commodity Manager (GCM)](https://feeny.ai/job/global-commodity-manager-gcm-endurance-energy-seattle-entv7rw6c1q6) — Seattle, WA
- [Controller](https://feeny.ai/job/controller-endurance-energy-seattle-85as1c8349af) — Seattle, WA
- [Integration & Test Specialist](https://feeny.ai/job/integration-test-specialist-endurance-energy-seattle-c648zarjyr16) — Seattle, WA