Junior Mechanical Design Engineer I Advanced 3D Tool Design I Geothermal Sector

Hephae Energy Technology Corp.; Bilbao; On-site; EUR 28,000 - 36,000; Full time

Benefits offered by this job

International travel opportunities

Training & development

International working environment

Job summary

Hephae Energy Technology Corp. in Bilbao, Spain, seeks a Junior Mechanical Design Engineer to contribute to the next generation of geothermal drilling tools.

You will develop 3D models, create detailed drawings, and support hardware development from concept through prototyping and testing. Working with senior engineers and the R&D team, you will own components and subsystems, ensure manufacturability, and gain hands-on experience in extreme environments as part of a fast-paced, international

Qualifications

• Degree in Mechanical/Industrial Engineering or related field.
• 0–2 years in mechanical design, product development, or related.
• Strong fundamentals in materials, manufacturing processes, mechanics, and assemblies.
• Proficient in 3D CAD software (SolidWorks/Onshape/Siemens NX) and drafting.
• Strong English communication skills (CEFR C1).

Responsibilities

• Create and develop 3D models, components, and assemblies for advanced geothermal drilling tools.
• Design mechanical components and subsystems for high temp, high pressure, shock, and vibration environments.
• Generate technical drawings and manufacturing documentation with dimensions, tolerances, materials, and assembly requirements.
• Maintain CAD structures, configurations, and design revisions.
• Manage engineering data within PDM/PLM systems.
• Collaborate with senior engineers to evaluate design concepts and manufacturability.
• Support prototyping, assembly, testing, and troubleshooting of new tool concepts.

Skills

3D CAD

SolidWorks

GD&T

Engineering fundamentals

Prototyping

Hands-on engineering

English communication (C1)

Education

Bachelor's degree in Mechanical/Industrial Engineering or related field

Tools

SolidWorks

Onshape

Siemens NX

Job description

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.

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.

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