Senior/Principal Software Engineer

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/Principal Software Engineer at Endurance, you will build software to optimize and accelerate every aspect of the company. As we scale from our first hundred-kilowatt subsea demonstration to gigawatt deployments, you will architect, configure, and build the internal systems to run the hydrothermal power plant, the testing software, the cloud infrastructure, and the tooling for all engineers at the company. We believe an internal software team building the right stack is one of the highest leverage moves we can make as we scale. You will be in the room with the hardware engineers designing subsea power plants, the manufacturing leads building the production system, the supply chain leads structuring procurement, and the operators running ocean deployments, designing and delivering the software that makes their work faster, safer, and more scalable. In the near term, that means standing up the data and telemetry pipeline for our first subsea demonstration, building out our cloud services, scoping and selecting the foundational engineering and manufacturing systems, designing the supply chain and procurement tooling that will support our first 10MW commercial deployments, and prototyping the first generation of Endurance's internal tools. You will also build the production software that makes a power plant on the seafloor operable. You will design the data pipeline that streams from a turbine kilometers below the surface, the dashboards that let a Seattle control room run a plant off Tonga, and the operational software that turns a fleet of subsea power plants into a utility. The ideal candidate is a senior or staff engineer who has strong judgment on when to buy a vendor product and when to write your own, can hold technical credibility with mechanical, electrical, and systems engineers, and is energized by building the software that operates a category of energy infrastructure that has never existed before. You will be one of the first full-stack software engineer at the company. You will work directly with the founding team and the operational leaders across Endurance, and as the software function grows, you will have significant influence on what gets built, who joins the team, and how the organization is shaped.