Mechanical Design Engineer | Precision Instrumentation

About Nanological

Nanological is a Madrid-based deep-tech company developing rapid diagnostic technologies for bloodstream infections and sepsis. Our proprietary platform, SOMIA, combines microfluidics, optomechanical sensing and AI-powered data analysis to identify pathogens directly from blood, with the goal of enabling faster clinical decision-making in critical care.

Our multidisciplinary R&D; team brings together engineers and scientists working across mechanics, fluidics, optics, electronics and software to develop and integrate a complex diagnostic system.

About the role

We are looking for a Mechanical Design Engineer to take an active role in the design, development and optimisation of mechanical components, precision mechanisms and integrated subsystems for our diagnostic platform.

You will work on the development of custom mechanical parts, mechanisms and assemblies, taking them from initial concept through detailed design, prototyping, testing and iterative improvement.

Beyond individual components, you will need to think at a system level, understanding how different subsystems interact and ensuring your designs work as part of a complex instrument.

This is a hands-on engineering position where you will work closely with a multidisciplinary R&D; team, taking ownership of your work and contributing directly to the development of our product. We are looking for someone who enjoys solving engineering challenges, takes initiative and is motivated by the opportunity to help build an innovative product in a growing deep-tech startup.

What you will do

- Design and develop custom mechanical and optomechanical components, precision mechanisms and assemblies for our diagnostic platform.
- Create 3D CAD models, technical drawings and specifications, considering materials, tolerances, optomechanical stability and manufacturing processes.
- Develop and integrate mechanical solutions within complex,



interconnected systems, working across mechanical, fluidic, optical and electronic interfaces to ensure robust subsystem performance.
- Take ownership of subsystem development, from defining functional requirements and evaluating design alternatives to prototyping, testing and performance optimisation.
- Build, assemble and test prototypes, evaluating functionality, performance, reliability and reproducibility.
- Troubleshoot mechanical issues, investigate root causes through systematic testing and implement and verify design improvements.
- Collaborate with engineers and scientists from different disciplines to translate technical requirements into practical mechanical solutions.
- Work with external suppliers and manufacturers to support prototyping, fabrication and design iterations.
- Contribute to design documentation, manufacturability, assembly and maintainability as the platform evolves towards a product.

What we are looking for

We are looking for an enthusiastic, hands-on engineer with professional experience in mechanical design and the development of complex engineering systems.

- Bachelor's or Master's degree in Mechanical Engineering, Industrial Engineering, Mechatronics or a related field.
- 5+ years of professional experience preferred in mechanical design and development of components, precision mechanisms and subsystems for complex engineering systems.
- Proficiency in 3D CAD software and experience preparing technical drawings and documentation.
- Good understanding of mechanical design principles, materials, tolerances,



precision mechanisms, mechanical stability and manufacturing processes.
- Hands-on experience with prototyping, mechanical assembly, testing, troubleshooting and iterative optimisation.
- Ability to independently analyse technical problems, evaluate design alternatives and develop and test practical solutions.

Nice to have

- Experience with scientific instrumentation, laboratory equipment, medical devices or diagnostic systems, preferably in regulated environments.
- Experience with microfluidics or fluidic systems, including pumps, valves, tubing, connectors or flow control.
- Experience with optomechanical systems, precision alignment or positioning systems.
- Experience with design for manufacturing and assembly (DFM/DFA) and product industrialisation.

The kind of person we are looking for

- Is proactive and resourceful, taking initiative and ownership of technical challenges through implementation and testing.
- Is adaptable and comfortable with uncertainty, embracing the evolving challenges and priorities of a startup.
- Is open-minded and collaborative, values different perspectives and communicates effectively with others.
- Is motivated and ambitious, excited by the opportunity to contribute to something meaningful and grow professionally along the way.

Why Nanological?

At Nanological, you will have the opportunity to contribute directly to the development of a first-in-class diagnostic technology with the potential to improve clinical decision-making in severe infections.

You will join a multidisciplinary team of engineers and scientists in a collaborative environment where ideas are openly discussed, initiative is valued and individual contributions make a real difference.

As part of a growing deep-tech startup, you will have the opportunity to take ownership of your work, influence the development of a real product and grow alongside the company.

📌 Mechanical Design Engineer | Precision Instrumentation (Madrid)
🏢 Nanological
📍 Madrid