Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Design and optimise innovative cooling systems for solar technology.
- Company: Join a dynamic start-up revolutionising renewable energy in the Greater Edinburgh Area.
- Benefits: Competitive salary, employee share options, and flexible working arrangements.
- Why this job: Make a real impact on solar efficiency and contribute to a sustainable future.
- Qualifications: Engineering degree with experience in thermal-fluid design and CFD analysis.
- Other info: Be part of an entrepreneurial team with excellent growth opportunities.
The predicted salary is between 28800 - 48000 ÂŁ per year.
Location: Livingston/Greater Edinburgh Area
Type: Full-time
SolarSub is a start‑up on a mission to allow solar panels to thrive in the sun. The company has developed a patent‑pending passive cooling technology to negate the impact of overheating on solar panel efficiency and lifespan, achieving a double‑digit improvement in revenue. Initially, we are deploying in the floating solar market globally, unlocking more favourable project economics. The company has secured Pre‑Seed investment and has generated interest amongst OEMs and end‑users. The technology has been validated at the University of Edinburgh, with in‑field trials ongoing in Dubai. We are now moving to our next stage of commercialisation, setting up field trials with strategic end‑users.
We are seeking a Mechanical Engineer to join our team and support us in our technical development. This role offers a chance to contribute to driving a fundamental shift in renewable energy by maximising the efficiency of solar. The role is an important early hire into an early‑stage start‑up, and we are seeking an individual who would relish the opportunity to execute in an entrepreneurial environment and grow in a leadership capacity. The role will be based in Livingston/Greater Edinburgh Area on a full‑time basis, initially with flexibility for virtual working, but will require an increase in in‑person presence in an office and lab facility.
Role Overview
You will focus primarily on the development and optimisation of the cooling system at the core of SolarSub’s technology. You will design, model and test thermal and fluid components while supporting the validation of performance and reliability improvements across an array of geographies.
Key Responsibilities
- Design and prototype system components using CAD, FEA and CFD tools.
- Conduct performance simulations and experiments to validate/measure cooling efficiency and heat transfer.
- Work closely with the Systems Engineering team to incorporate structural requirements, electrical systems, mechanical component considerations, and fit‑for‑manufacturing principles into the design of the passive cooling system.
- Work with material specialists and external partners on corrosion resistance and durability testing.
- Produce clear technical documentation and support IP development to capture and protect future innovations.
Ideal Candidate
- An engineering degree in mechanical, aerospace, or other related fields.
- Must have proven experience with thermal‑fluid design and CFD analysis.
- A track record of taking prototypes from mid‑stage readiness to a commercially viable product that complies with customer requirements, industry standards and other stakeholder needs.
- An understanding of thermal transfer and heat exchange is essential for this role.
Attributes
- Entrepreneurial mindset: A willingness to take initiative within the role and across the business as required.
- Team Player with the ability to execute autonomously: Thriving in a high‑trust environment with high personal accountability, whilst understanding the amplifying value of the skills that surround you.
- Gritty and optimistic: An ability to thrive in problem‑solving, taking setbacks in stride to propel the team forward.
- Low Ego: To underpin personal growth and contribute to creating a high‑feedback environment, allowing the team to develop as a whole.
Applying
If you are interested in joining our mission, please submit your cover letter and CV using the following Google form by the 6th of January 2026. Applicants must have the right to work in the UK.
Compensation
Compensation will be commensurate with experience, with a base salary and participation in the employee share option plan.
Mechanical Design Engineer - Product Development employer: SolarSub
Contact Detail:
SolarSub Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Mechanical Design Engineer - Product Development
✨Tip Number 1
Network like a pro! Reach out to people in the renewable energy sector, especially those connected to SolarSub. Attend industry events or webinars and don’t be shy about introducing yourself. You never know who might have a lead on that perfect job!
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your CAD designs, thermal simulations, and any projects related to cooling systems. This will give you an edge and demonstrate your hands-on experience to potential employers.
✨Tip Number 3
Prepare for interviews by brushing up on your technical knowledge and understanding of SolarSub’s technology. Be ready to discuss how your experience aligns with their mission to improve solar panel efficiency. Confidence is key!
✨Tip Number 4
Apply through our website! It’s the best way to ensure your application gets noticed. Plus, it shows you’re genuinely interested in being part of the SolarSub team. Don’t forget to tailor your cover letter to highlight your entrepreneurial mindset and problem-solving skills!
We think you need these skills to ace Mechanical Design Engineer - Product Development
Some tips for your application 🫡
Tailor Your Cover Letter: Make sure to customise your cover letter for the Mechanical Design Engineer role. Highlight your experience with thermal-fluid design and how it aligns with our mission at SolarSub. We want to see your passion for renewable energy shine through!
Showcase Your Technical Skills: When detailing your CV, focus on your CAD, FEA, and CFD skills. We’re looking for someone who can hit the ground running, so make sure to include any relevant projects or prototypes you've worked on that demonstrate your expertise.
Be Authentic: We value a low-ego, gritty mindset here at SolarSub. Don’t be afraid to share your challenges and how you overcame them in your application. We want to know how you tackle problems and contribute to a team environment!
Apply Through Our Website: Remember to submit your application via the Google form linked in the job description. It’s the best way for us to keep track of your application and ensure it gets the attention it deserves. We can’t wait to hear from you!
How to prepare for a job interview at SolarSub
✨Know Your Stuff
Make sure you brush up on your thermal-fluid design and CFD analysis skills. Be ready to discuss specific projects where you've applied these techniques, as well as any challenges you faced and how you overcame them.
✨Show Your Entrepreneurial Spirit
SolarSub is looking for someone with an entrepreneurial mindset. Think about examples from your past where you've taken initiative or led a project. Be prepared to share how you can contribute to the company's mission of maximising solar efficiency.
✨Team Player Vibes
Highlight your ability to work autonomously while also being a team player. Prepare to discuss how you've collaborated with others in previous roles, especially in high-trust environments, and how you value the skills of those around you.
✨Prepare for Problem-Solving
Expect to face some technical questions or scenarios during the interview. Practice articulating your thought process when tackling engineering problems, and don't shy away from discussing setbacks you've encountered and what you learned from them.