Job Description

IONCOR is an agile independent battery solutions company with Nordic roots and decades of experience as a leading partner for some of the world’s most admired brands. With a wide range of professionals in Finland and Germany, we provide modular battery products, customized solutions and contract manufacturing to energize a global energy transition. Buses, trucks, construction, material handling and agriculture are examples of categories where production volumes of equipment are lower, and end-use cases more complex and diverse, making a swift and viable transition a real challenge. This is where we come in.

We help customers master and gain maximal value out of battery technologies across the lifecycle, from early specifications and end-user support to reuse and recycling. This is how we electrify a global energy transition.

We are now looking for eager Summer Trainees to join our team. As a Summer Trainee, you can kick-start your career with gaining hands-on experience and be a part in shaping the future of battery technology.

Would you like to be a new member of the Method Design team?

Method Design is a manufacturing engineering function responsible for designing and implementing new production line projects, developing production tooling, defining processes, and driving lean continuous improvement initiatives. Typical activities include project management, CAD-based tooling design, time studies, and creating work instructions.

As a summer trainee in Method Design, you will be at the center of production environment development, working closely at the interface between product design and manufacturing. You will gain hands-on experience in a state-of-the-art high‑volume production environment, develop practical project management skills, and take responsibility for meaningful tasks that contribute directly to operations.

Key Responsibilities:

• Project management support
• Continuous improvement activities in production
• Process development tasks
• Tooling and fixture design

The location of this traineeship is in Salo.

We hope you have:

• Ongoing studies or a recent degree in mechanical, industrial or similar engineering field
• Passion for creating, fixing, or experimenting with technical things like cars, bikes, DIY projects, or 3D printing. Practical, hands‑on experience is a plus.
• Interest in processes and project management
• Can-do attitude
• Good Excel skills
• Language skills: Good spoken and written English is required. Finnish language is seen as a benefit.

This is what we offer you:

Opportunity to join an agile and innovative team dedicated to driving the global energy transition through advanced battery solutions. With our Nordic heritage and expertise, we provide the chance to work on cutting-edge projects across diverse industries, where electrification presents unique challenges, a good work–life balance and a feeling of creating something new.

• Flexible working hours
• An international atmosphere, with both Finnish and English as working languages
• Paid internship, with pay based on credits completed. Salary range is 2300-2750€/month.
• Trainee community and fun events throughout the summer
• Employee benefits such as free access to our gyms in Salo and Uusikaupunki, occupational healthcare, lunch benefit, and various discounts at selected stores and gyms.

Future tech needs future talent!

Interested, but still have questions? You can find more information about us on our website If you can’t find an answer to your question, please do not hesitate to reach out to our HR team: talentmanagement@ioncor-batteries.com.

Join our team and apply by 22.2.2026 via our application tool. We look forward to receiving your application!

We’ll review applications after the deadline and invite selected candidates to meet the hiring manager (and possibly future teammates), either face-to-face or via Teams. We aim to keep our trainee recruitment process straightforward and transparent, and after one interview, you can expect a decision from us by the end of March.

#Techsummer #Teknokesä