About Stark

Stark builds the world’s most powerful electric motorcycles. From the VARG MX to the road-legal VARG EX & SM, our bikes have won world championships and are engineered to outperform anything with a combustion engine.

We’re based in Sant Boi, Barcelona, growing fast (77% year-on-year), and building a team that will take us even further. If you want to work on a product that people are genuinely obsessed with, this is it.

Stark will become the integral market leader in premium motorcycles. Building premium motorcycles requires innovation and we need your help to make us succeed

Our mission is to lead the way towards a sustainable motorcycle industry, by reducing plastic and CO2 pollution.

This will be achieved by building sustainable products that are superior to traditional technology in terms of Performance, Emotion and Design.

The Role

We are looking for an R&D; Technician – Battery Assembly, reporting to the Head of Process Development Production. We need your help to make sure that our prototype battery build-ups, including testing works, run smoothly.

You will be in charge of prototype battery build-ups, testing and tear-downs, and making sure tools and workshop are always in order — keeping everything clean and professional, like an F1 pit area.

What You’ll Do

- Take full ownership of building up complex prototype batteries, installing sensors and setting up and performing tests with batteries

- Analyze and detect problems (electric and hardware) in batteries and repair them independently

- Support the development of batteries with assembly,



tear-down and testing work according to tasks defined by related engineers

- Organize battery build-ups for testing and disassembling, including documentation

- Organize prototype parts with a clear place for everything

- Travel to test sites, and if necessary to dealers and distributors, when required

What you will bring to Stark
- Technician, Electrician, Mechanic or EV technician education, or similar field experience in HV battery assembly

- High voltage qualification in automotive

- At least 4 years of experience as a battery, motorcycle or vehicle technician/mechanic — experience in e-mobility or racing is a plus

- Experience with high voltage battery assembly, tear-down and testing

- Familiarity with tools for data acquisition and most workshop processes and techniques

- Extremely organized, with the ability to work collaboratively with cross-functional teams and independently with minimal supervision

- Comfortable in a fast-paced, ever-evolving, highly innovative environment (startups or high-tech companies)

- High standards for yourself and everyone you work with, constantly looking for ways to improve product performance, quality and cost





- Outstanding communication and interpersonal skills; fluent Spanish and basic English is required

- Nice to have: experience with high voltage systems; experience working with batteries, inverters and/or motors; data logging experience; passion for technology

Why work with us?
- The chance to work on a product people are genuinely passionate about

- A fast-growing company with real momentum

- A creative, international team based in Barcelona

- Competitive salary and benefits package

- Direct access to riders, race teams, and the product — this is not a remote-from-the-product role

- Subsidized lunch in our in house restaurant

- Free access to our in-house gym (including weekends!)

- 30 days of paid vacation

At Stark, we don’t just accept difference—we celebrate it, we support it, and we thrive on it for the benefit of our employees, our products, and our community.

We are committed to creating an inclusive environment where everyone, regardless of gender identity, sexual orientation, race, religion, age, neurodiversity, or disability, feels a true sense of belonging. We believe that diverse teams make better decisions and that a culture of equity is a prerequisite for innovation.

Accessibility: If you require any reasonable adjustments during the application or interview process (such as assistive technology, extra time, or a specific format), please let us know at [email protected]. We are here to support you.

We encourage applications from underrepresented groups and are excited to see how your unique perspective can help us grow

📌 R&D Technician - battery assembly (Sant Boi de Llobregat)
🏢 Stark Future
📍 Sant Boi de Llobregat