Mechanical Engineer

Palma, Spain
about 2 months ago
Full time role


Our mission is to decarbonise the transportation industry, and we devote our technology, time and talent to advancing the transition ...

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Job Description

What is XFuel anyway? 🚀🌳⛽

Our mission is to decarbonise the transportation industry, and we devote our technology, time and talent to advancing the transition to sustainable low-carbon fuels.

For the world to reach net-zero, we urgently need sustainable liquid fuel replacements now. Over the last 10 years, XFuel has developed and patented technology to produce sustainable low-carbon road, marine and aviation fuels from solid biomass waste sources such as forestry, manufacturing, construction and agriculture.

Our road and marine fuel is a drop-in replacement to fossil fuels, not requiring blending, engine modifications or infrastructure investment in energy distribution or storage. Our project capital requirements are up to 5x lower, and our production costs are comparable or lower than fossil fuel market prices. We have a pilot plant in Mallorca, Spain with a production capacity of ~1m litres per year which demonstrates our technology, and have a modular approach to scaling up production in our commercial projects.

Our first commercial project planned is in Wilton international, Teesside, UK, with site, suppliers and global off-taker partners lined up, initially producing 4.6m litres of fuel and saving 10k tons of CO2 per year in 2023. We are planning a follow-on phase with an additional 8x the production and savings in 2024.

We have recently closed an oversubscribed financing round from top-tier international VCs and impact funds, and are collaborating with some of the most forward-thinking and innovative corporates in the world.

XFuel’s goal is to build, own and operate plants globally, becoming the full-stack sustainable fuel company for the 21st century. We are rising to the challenge of decarbonising the transportation industry and we are looking for passionate people to help us get there. We hope to find people that reflect our mission, vision, values and drive.

What is my mission? ‍‍👩‍💻👨‍💻

Your first mission for this role is to assist the engineering team in overcoming the technical challenges to drive our modular technology to commerciality over the next 18 months, pathing the road to decarbonising the transportation industry.

You will be working closely with the head of engineering and team on the development, manufacturing and testing of components in our demonstration plant in Mallorca, Spain, with the prospect to be used in our first commercial-scale conversion and desulphurisation plant in the UK. You will be performing hands-on tasks involved in the upgrade of our demonstration plant.


Specific responsibilities will include:

  • Installation, procurement, manufacturing and/or assembly of components and devices such as multipurpose feedstock input systems, liquid solid pumps, oil/solids and fuel/water separation systems and filters.
  • Development and modification of key components at our pilot plant (Mallorca, Spain) applying principles of mechanics, thermodynamics, heat transfer, and materials.
  • Testing and evaluation of components.
  • Assisting in the planning, construction and commissioning of our first modular commercial-scale industrial plant, and collaborating with external engineering contractors and parties.
  • Contributing to team and organisational improvements in process and best practices.
  • Developing clear and comprehensive technical documentation and reports.
  • Collaborate with the team in development and improvement of all our products.
  • Assisting in the growth and nurturing of the core engineering team.

Those who are successful will progress quickly, either as individual contributors or following a management path.

We’re looking for someone who: 🧠💚🥇

  • Holds a degree in Mechanical Engineering
  • 3+ years experience in industrial plants, with a preference for hands-on/field work
  • Hand-on experience building, welding, assembling and maintaining components
  • Interest in renewable energy concepts and trends
  • Excellent and clear communication skills for team-based working
  • Can work both independently and collaboratively, as needed, to achieve your mission
  • Be a highly motivated, proactive and passionate person
  • Feel drawn to the company mission and vision, and excited to be part of our culture
  • Is a self-starter who thrives in constantly evolving environments, ideally with early-stage start-up experience

It would be beneficial to be: 🧠🥈

  • Holding a Master’s degree or higher
  • Bilingual (English & Spanish)

Location 🌍

Mallorca, Spain (GMT +1) – It doesn’t get any better!

Our Values 🙌

We focus on impact – we work on problems that have the biggest impact.

We innovate to better serve our planet – we believe innovation is crucial in tackling climate change.

We act with integrity – do what’s right, even when it’s hard.

We are passionate and win together – we know that success is a result of great teams, positive energy and collaboration

What if you’re a partial fit? 🌱

We prioritise grit, positivity, and the willingness to get stuck in and learn, and encourage you to apply even if your experience doesn't exactly match this job description.

Equal employment opportunity 🌈

XFuel is an equal opportunity employer: we value diversity. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.


  • High-impact mission and purpose-driven team / culture
  • Competitive salary
  • Equity in a fast growing start-up
  • Working from one of the most incredible places to live!
  • Enhanced parental leave
  • Monthly team lunches and socials

Our mission is to decarbonise the transportation industry, and we devote our technology, time and talent to advancing the transition ...

View Company Profile