Junior Engineer

Our mission is to decarbonise the transportation industry, and we devote our technology, time and talent to the planet, advancing the transition to sustainable low-carbon fuels. We are committed to leveraging our expertise to accelerate the transition away from fossil fuels, reducing greenhouse gas (GHG) emissions while maintaining fuel affordability and reliability.

To achieve global net-zero goals, the world urgently needs affordable, scalable, sustainable liquid fuel solutions. Unlike alternative fuel technologies that require costly infrastructure changes, over the last 10 years, XFuel has developed and patented technologies to produce sustainable drop-in fuels that integrate seamlessly into existing transportation systems, including marine, road, and aviation sectors.

XFuel is backed by world-class VCs and ideally positioned to scale as a leading sustainable fuel company. Our drop-in fuels seamlessly replace fossil fuels without requiring blending, engine modifications, or additional infrastructure investment for distribution or storage. With project capital requirements significantly lower than traditional alternatives and production costs comparable to or below fossil fuel market prices, our approach is both cost-effective and scalable.

We have successfully demonstrated our technology through operational pilot plants and a low-risk, modular scale-up strategy that enables efficient commercial deployment. Our focus is on building, owning, and operating plants globally, producing sustainable fuels with significant GHG savings and providing a viable solution for the decarbonization of transportation. As we continue to grow, we are looking for passionate individuals who share our mission, values, and drive to accelerate the transition to cleaner fuels.

What is my mission?

Your mission will be to support XFuel’s in-house engineering team in the development and deployment of our First-of-a-kind waste-to-fuel production plants. You’ll assist with procurement, technical documentation, research, and hands-on assembly, while contributing to front-end engineering design (FEED) alongside our EPC partners and internal engineers. This is a fast-paced, dynamic role where your responsibilities will grow with your capabilities, and you’ll be trusted to help solve complex problems, coordinate high-priority tasks, and ensure smooth execution of key engineering deliverables.

Specific responsibilities will include :

• Assist with the procurement of equipment, materials, and services for the pilot & future commercial plant.
• Support the assembly and installation of XFuel’s new automated pilot plant.
• Maintain and organise technical documentation, including datasheets, manuals, drawings, and reports.
• Collaborate with the internal engineering team and external EPC partners on front-end engineering design (FEED) work.
• Help track project timelines, deliverables, and action items across engineering workflows.
• Prepare and participate in technical meetings, including documenting minutes and following up on tasks.
• Contribute to the development and optimisation of internal engineering processes and tools.
• Conduct basic research or analysis to support engineering decisions and design improvements.
• Support commissioning and testing activities as needed during the pilot plant roll-out.

We’re looking for someone who :

• Holds at least bachelor’s degree in engineering (mechanical, chemical, process, or related field).
• Has up to 2 years of experience in an engineering or technical support role (experience in early-stage startups or industrial environments is a plus).
• Is comfortable working with engineering documentation, technical drawings, and project management tools.
• Has basic proficiency with CAD software (e.g., AutoCAD, SolidWorks) and familiarity with MS Office and G-Suite, especially spreadsheets and technical reports.
• Exceptional communication skills, with the ability to collaborate effectively across teams and engage external partners.
• Flexible and adaptable, capable of working both independently and collaboratively to achieve goals.
• Highly motivated, proactive, and passionate about building an outstanding workplace culture.
• Deeply committed to sustainability and climate action, with a strong alignment to XFuel’s mission.
• Thrives in fast-paced, evolving environments, ideally with experience in early-stage startups.
• A self-starter with a problem-solving mindset, always looking for ways to improve and innovate.
• Is eligible to work and live in the EU.

It would be beneficial to have familiarity with :

• Bilingual (English & Spanish) with clear and confident communication.
• High-impact mission and purpose-driven team / culture.
• Temporary housing assistance while you search for a place of your own.
• Startup equity + incentives.
• Enhanced parental leave.
• Monthly Team lunches and socials.
• Working from one of the most incredible places to live!

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 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.

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