Senior Test Infrastructure Software Engineer

As a Senior Test Infrastructure Software Engineer at Endurance, you will build the software, controls, and electrical infrastructure that allows our engineering team to rapidly validate every component and every subsystem that goes into a subsea geothermal power plant. This is not a traditional test software role. One day you may be wiring sensors into a valve test stand, integrating DAQs and PLCs, or bringing up a new electrical system. The next day you may be writing Python services, building hardware-in-the-loop (HITL) simulations, architecting automated test frameworks, or developing software that injects faults to break our control systems before the ocean does. We believe great test infrastructure is one of the highest leverage investments we can make as an engineering organization. Every improvement you make increases the speed at which mechanical, electrical, firmware, and controls engineers can design, test, iterate, and deploy hardware. Your job is to build the software and hardware ecosystem that enables that acceleration. You will work directly with firmware, electrical, mechanical, and test engineers to understand what they are building, identify how it should be tested, and rapidly create the infrastructure needed to answer critical engineering questions. In the near term, that means standing up component qualification rigs, building automated valve and pump test systems, developing simulation environments for embedded software, integrating industrial controls hardware, and creating the first generation of Endurance’s unified testing platform. As our systems become more integrated, you will build the infrastructure that validates complete power generation systems. You will design distributed test software, develop hardware-in-the-loop environments capable of simulating real operating conditions and failure modes, and build the data acquisition and visualization systems that allow engineers to understand system behavior in real time. The ideal candidate is an exceptional software engineer who enjoys working close to hardware. You should be equally comfortable designing software architecture, integrating industrial control systems, writing simulation software, debugging embedded interfaces, and grabbing a crimper or oscilloscope when that’s the fastest way to get the test running. You will be one of the first software engineers focused on test infrastructure at the company. You will work directly with the founding team and engineering leadership across Endurance, and as the function grows, you will have significant influence on the testing architecture, engineering standards, and future hires. Key Responsibilities: Design and build the software infrastructure that powers testing across Endurance, from component qualification through full integrated system validation. Architect and implement hardware-in-the-loop (HITL) and simulation environments that allow firmware and controls software to be tested under realistic operating conditions and failure scenarios. Develop software for automated test execution, operator interfaces, data acquisition, visualization, storage, and analysis. Design and integrate the electrical and controls infrastructure behind new test systems, including DAQs, PLCs, VFDs, sensors, instrumentation, and industrial communication networks. Partner closely with firmware, electrical, mechanical, controls, and systems engineers to rapidly develop new testing capabilities. Build scrappy one-off test systems when speed matters, then evolve successful concepts into scalable engineering infrastructure. Write production-quality software while establishing the architecture and engineering patterns that future test systems will build upon. Own the technical foundation of Endurance’s testing ecosystem as it grows from individual laboratory experiments to full power plant validation. Help shape the test infrastructure organization as it grows.