Mechanical Design Engineer

Junior Mechanical Design Engineer – Advanced 3D Tool Design - Hephae Energy Technology Skip to content What We're Building Who we're hiring Who we are What's in the news Junior Mechanical Design Engineer – Advanced 3D Tool Design Position Summary To help us build the next generation of geothermal drilling technology, we’re looking for a Junior Mechanical Design Engineer who thrives on complex 3D assemblies, precision engineering, and real-world hardware development. If you enjoy transforming challenging engineering concepts into robust mechanical designs, then this is your moment. As a Junior Mechanical Design Engineer, you will support the design and development of advanced geothermal drilling tools and mechanical systems. Working closely with experienced engineers and the R&D team, you will help transform innovative concepts into robust, manufacturable mechanical designs, while progressively taking ownership of components and subsystems. You will be involved throughout the product development process, from initial concepts and 3D modelling to detailed drawings, prototyping, assembly, and testing. Your work will contribute directly to developing tools designed to operate kilometres underground in some of the harshest environments on earth. Company Description At Hephae Energy Technology, we are redefining how the world taps into deep geothermal energy. We design and develop robotics that operate under extreme temperatures and harsh subsurface conditions to unlock a baseload source of clean, renewable power. Join the movement as we enable next-generation geothermal for everyone, everywhere. Roles & Responsibilities: Create and develop 3D models, components, and assemblies for advanced geothermal drilling tools Support the design of mechanical components and subsystems for high temperature, high pressure, shock, and vibration environments Generate technical drawings and manufacturing documentation, including dimensions, tolerances, materials, and assembly requirements Support the development and maintenance of CAD structures, configurations, and design revisions Contribute to managing engineering data within PDM/PLM systems Work with senior engineers to evaluate design concepts, interfaces, tolerances, and manufacturability Support prototyping, assembly, testing, and troubleshooting of new tool concepts Candidate Requirements: Degree in Mechanical Engineering, Industrial Engineering, or a related field 0–2 years of professional experience in mechanical design, product development, engineering, or a related field Good understanding of mechanical engineering fundamentals, including materials, manufacturing processes, mechanics, and mechanical assemblies Intermediate proficiency with 3D CAD software such as SolidWorks, Onshape, Siemens NX (Unigraphics), or similar Ability or willingness to develop skills in creating detailed manufacturing drawings, tolerances, and GD&T Interest in product development, prototyping, and hands-on engineering Strong English communication skills (C1 level as defined by CEFR) Location: Bilbao, Basque Country, Spain Fast-paced environment, international ambition, real impact Continuous technical training and self-development opportunities International working experience with travelling opportunities Competitive salary and comprehensive benefits package APPLY FOR THIS POSITION PRIVACY POLICY TERMS & CONDITIONS ©2025 HEPHAE ENERGY TECHNOLOGY. ALL RIGHTS RESERVED Job application Junior Mechanical Design Engineer – Advanced 3D Tool Design SUBMIT Sign-up to our newsletter Sign-up Investor Expression of Interest SUBMIT Contact us SUBMIT Product Information Application Information Technical Support Products Electronics & Sensors Pandora210™ MWD Hermes – Top Mount Pulser Pandora225™ RSS Coming 2027 SUBMIT