Founding Mechatronics Engineer

FOUNDING MECHATRONICS ENGINEER London (on-site) - Full-time - £50-70k salary + 0.5-1.0% equity We're building the next critical module in every geothermal power plant, and we need a founding engineer to build it from the ground up. Our Mission Drilling advances are opening access to the Earth's inner heat worldwide, but geothermal is still held back by the chemistry of the fluids it brings to the surface. Today, operators reinject brines early to protect their plants from severe silica scaling, sending usable energy and dissolved critical minerals back underground. We recently raised £2 million to develop a silica removal module that boosts geothermal power generation and creates cleaner brines for co-producing energy and critical minerals from the same wells. Bring your talent to help create a new category of geothermal operations: built not just to survive brine chemistry, but to master it. Your Role As our Founding Engineer, you'll build the hardware that brings our chemistry to life, from the tools that speed up our lab work to the systems we deploy at geothermal power plants around the world. You'll own the hardware stack from day one, including mechanical design, fluid handling, instrumentation, electronics, controls and data acquisition, working directly with the founder CEO and the chemistry team to: → Turn our established experimental workflow into an automated lab platform, from dosing and mixing to sensing and data capture, so we can optimise our chemistry faster → Build a continuous-flow lab skid to test and compare process designs under representative temperature, pressure, flow and brine conditions → Define our core product,  choosing the architecture, components and fabrication partners for our silica removal retrofit module → Lead the commissioning and operation of our first pilots at geothermal power plants, proving our technology on live brine Who We Are Looking For A hands-on engineer who's happiest moving between CAD, the workshop and the lab, and who wants to own hardware all the way from first sketch to a working power plant. Ideally, you have:

• A degree in mechatronics, mechanical, electrical or a closely related engineering field (a multidisciplinary mechanical/electrical/software background is ideal)
• 5+ years taking multidisciplinary physical systems from concept through design, build, commissioning and debugging, ideally in a fast-paced start-up, with experience iterating through multiple prototype generations
• Strong CAD skills (SolidWorks or similar), with FEA/CFD to validate designs, and comfort with rapid prototyping (SLA, FDM, SLS) and workshop fabrication : Hand tool, CNC.
• Experience integrating sensors, actuators and embedded controllers (Raspberry Pi, ESP32, PLC or similar), and designing supporting electronics (e.g. KiCad). Working knowledge of communication protocols (I2C, UART, SPI, RS485, Modbus, MQTT) and of automating data collection with Python.
• A working grasp of fluid handling (pumps, valves, pipework, flow and pressure measurement, materials compatibility).
• Strong technical documentation habits: design reviews, user guides, maintenance manuals, formal risk assessment (PFMEA or similar).
• Experience acting as the technical bridge between hardware/software and the science.
• Autonomy to build an electromechanical device safely as the team's only electrical and mechanical specialist, with fault-finding skills across mechanical, electrical and electronic systems
• The ambition to change how clean energy and critical minerals are produced worldwide Why Join Us 📐 Build from a blank page. Design the first hardware we've ever made and help create our core IP, with founding equity and a path to leadership as we grow. 🌍 Real-world impact. See your hardware leave the lab and run inside geothermal power plants, helping unlock clean energy and critical minerals. 🔑 Geothermal access. Work with operators, advisors from leading geothermal companies, and investors with strong industrial networks. 🤝 A small, high-trust team. Join our founding team in West London with the ambition to build a technology that doesn't exist yet. Are you an exceptional engineer ready to build this company from the ground up? APPLY NOW