Battery Welding Engineer

Verkor is a French industrial company aiming to pioneer low-carbon battery manufacturing in France. With the backing of prominent industrial companies such as Renault Group, Plastic Omnium and Schneider Electric, Verkor intends to electrify the future of European mobility.

With over 750 experts from 48 different countries, our endeavor is to unite exceptional global talent to bring this ambitious and innovative project to life. Our strong and agile international team continues to grow and adapt to new challenges. Based in Grenoble and Dunkirk (France), we have recently started operations our Verkor Innovation Centre (R&D centre and 4.0 pilot line).

We now focus on building the world’s most modern and efficient Gigafactory in Dunkirk (France). With this facility, our ambition is an initial annual production of 16 Gwh of lithium-ion batteries by 2025, thus powering 300,000 electric vehicles annually.

In joining us you will actively participate in this breathtaking industrial adventure to shape the future of European mobility.

General Mission

As a part of the Process R&D team, we are seeking a highly skilled Laser Welding and Ultrasonic Welding Expert to support our development activity for lithium-ion battery. This position plays a critical role in developing, optimizing, and maintaining welding processes—laser and ultrasonic—for battery cell and module assembly. The expert will ensure high process reliability, quality, and efficiency in line with stringent battery safety and performance standards.

Main activities

• Develop and optimize laser welding and ultrasonic welding parameters for battery components (tabs, electrodes, busbars, terminals)
• Define welding process windows to ensure joint integrity, mechanical strength, and electrical performance
• Lead DOE experiments, analyze results, and implement improvements
• Perform failure analysis on weld defects (spatter, cracks, voids, weak joints) and recommend corrective actions
• Specify, qualify, and validate welding equipment and tooling in collaboration with suppliers and internal teams
• Document welding procedures and contribute to xFMEA, control plans, and SOPs
• Train operators and technicians on process understanding and machine operation
• Monitor KPIs and SPC data to ensure process stability and yield targets
• Support commissioning and scale-up activities from pilot to mass production

Prerequisites

• Minimum 5 years of industrial experience in laser and/or ultrasonic welding processes, preferably in battery manufacturing, automotive, or electronics assembly
• Experience with automated welding systems and industrial robotics is a strong plus
• Master’s or PhD degree in Mechanical Engineering, Manufacturing Engineering, Materials Science, or a related technical field
• In-depth knowledge of laser welding (fiber, pulsed, continuous wave) and ultrasonic welding technologies
• Familiarity with battery tab materials (copper, aluminum, nickel) and their welding characteristics
• Proficiency in using weld monitoring systems, microscopy, non-destructive testing (NDT), and tensile/shear testing methods
• Experience with CAD software and data acquisition systems
• Understanding of heat-affected zone (HAZ) behavior, metallurgical bonding, and joint design principles
• Knowledge of ISO, IATF 16949, and EV battery safety standards
• Strong analytical and troubleshooting skills, with experience in Six Sigma or Lean Manufacturing principles

Why join us?

Strong company spirit and culture settle down around our 4 values:

• Contribution We promote personal initiative and give everyone the means to contribute to the company's success.
• Communication We're committed to transparent communication: we say what we think, and we mean what we say.
• Team Spirit Everyone, in their role, is an ambassador for the company. At Verkor, success is most definitely a team sport!
• Commitment We're all working towards a common goal: a sustainable future, which we're building one step at a time.

Attractive work conditions*

• Stimulating work environment: pleasant offices, multicultural and motivated team
• Lunch vouchers
• 50% of local transportation costs financed
• Industry-leading healthcare
• Verkor Shareholding Scheme
• Opportunities to network and connect with worldwide experts

For more info on the company, please visit us at www.verkor.com

*all positions are open to individuals possessing a Recognition of the Status of Disabled Worker (RQTH)