The Role As an expert in joining processes, you’ll be at the forefront of the creation of next-generation electric motorcycles, batteries & associated products. You’ll be responsible for developing the whole joining processes from prototypes to series production in batteries including process qualification, validation and testing.

Moreover you will train and qualify inline quality measurement systems, define tools and set requirements for the welding materials and geometry. You will therefore assist Stark’s R&D; through advice on internal validation processes & design improvements for series production. You will be part of the growing team for “Production Process Development” and report to the Team leader and CTO as well.

You'll need to have hands‑on experience, developing complex assembly processes and the ability to thrive in a fast‑paced, evolving, and highly innovative environment.

What You’ll Do

Be the technical lead of developing joining technologies (focus bonding/laser welding)

Install and develop new bonding/laser welding processes

Develop a robust process window for bonding/laser welding in series production for possible variations in the process

Install and train online quality measurement systems to control the process in series production

Set requirements for parts (materials/geometry) and tools (for welding)

Define specifications for machines, tools and facilities

Plan and assure that targets are achieved on time within the expected quality & costs

Conceptualize, bring‑up, prototype, test and deliver production welding processes, R&D; and in‑line validation processes

Review and approve documentation including drawings, schematics, and detailed procedures

Ensure internal validation of the overall systems





Support testing and analyses in other areas of engineering or development

Support the transition to the manufacturing line

What you’ll bring to Stark

Mechanical Engineering degree or similar

Deep experiences in joining technologies with focus on bonding and laser welding

Experiences in teaching automated welding machines with different materials & geometries

Experiences in designing tools for welding and setting requirements for the parts and tools

Strong analytical & problem‑solving skills

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 innovate, improving your products performance, quality, and cost

Outstanding communication and interpersonal skills, fluent English is a must

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.

📌 Laser Welding Specialist - Battery Production (Madrid)
🏢 Stark Future
📍 Madrid