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.
As a Quality Engineer Summer Trainee, you will be assisting Quality Team with the industrialization and project handover to serial production. Additionally, you will assist the team in daily tasks, such as problem-solving process and collecting and analyzing data to identify opportunities for improvement.
This position is an exciting learning opportunity for a motivated person to learn more about a company’s quality practices and assist our quality team in the day-to-day tasks.
The location of this traineeship is in Salo. A hybrid working model is also possible.
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.
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

Exceeding expectations effectively is what Valmet Automotive is famous for.
We lead a new category of manufacturing solutions for fast-movers in automotive, defense, green energy and beyond.
Valmet Automotive is a trusted partner for industrializing future technologies across automotive, defence, and high-tech industrial sectors.
With over 55 years of experience and continuous development in high-quality serial production, Valmet Automotive turns concepts into scalable manufacturing solutions with speed, precision, and flexibility.Driven by innovation and engineering excellence, we help customers accelerate growth and reduce time-to-market with an exceptional attention to operational performance and more sustainable solutions.
Over 1,9 million vehicles produced since 1968 for leading global OEMs, including Mercedes-Benz.
Carbon-neutral production since 2022, with an active path towards fully carbon-free own operations.
Over 1,900 employees in 3 countries, and 1,300 employees with exceptional expertise in high-volume, high-quality manufacturing in contract manufacturing.
End-to-end expertise in advanced manufacturing.