On-Call Trainee

Wärtsilä is an innovative technology company known for being a forerunner in the Marine and Energy markets. Every day, we – Wärtsilians – put our hearts and minds into turning Wärtsilä's purpose of enabling sustainable societies through innovation in technology and services into reality. Our ultimate aim is to provide increased value to both our customers and society. New, game-changing ideas and continuous improvement have been part of our DNA since 1834. Together, we can create new business opportunities and a more sustainable future that we can all be proud of.

We want to transition the world towards a decarbonised and sustainable future. By pushing the boundaries of engineering and technology, we can make it work. We are always on the lookout for future-oriented talent – want to join the ride?

We are looking for an On-Call Trainee with the main responsibility of maintaining internal sales applications. The preferred location for this position is Vaasa, Finland but Helsinki, Finland is also negotiable. We offer the possibility of hybrid work.

In this role, you can work up to 25 hours per week. To be considered for this position, you need to be a full-time student currently pursuing a degree in Finland.

Your role and responsibilities  

As an On-Call Trainee, your work will include writing HTML, JavaScript, and CSS to ensure web applications are up to date. You’ll be working as a part of an agile, goal-driven Sales Tools team with diverse expertise.

Your work will focus on these responsibilities:

• Help develop and maintain internal sales applications known as “Product Configurators”
• Assist in migrating an older codebase to new technologies
• Keep product configuration data up to date

To be able to succeed in the position, we expect you to have:

• Ongoing studies in Information Technology, Computer Science, Software Engineering, or a related field
• Good skills in HTML, JavaScript, and CSS
• Good skills in Git and SQL
• Basic understanding of C# and .NET
• Fluent spoken and written English
• Good teamwork skills
• A proactive mindset and eagerness to learn

Why you and us?   

We at Wärtsilä believe in empowerment, ownership, and taking responsibility for our work. We support each other’s growth, and co-creation is the true basis of our innovation. We have the courage to see opportunities and take initiative.

We are authentic and honest, and we strongly believe that by being your true self, you can accomplish so much more. We don’t always get it right the first time, and if mistakes are made, we make sure to learn and grow from them. We want everyone to voice their opinions freely. That is why we have built an environment that empowers you and everyone around you, and where you can feel safe and cared for. Are you eager to be part of this ambition?

We have an amazing team, and we are excited about our work and the impact it has on building sustainable societies. We are looking to find a colleague with this shared passion for smart technologies and a sustainable future.

Contact & next steps  
  

We hope to hear from you soon by submitting your application through our Careers portal. We aim to keep you updated on the process throughout.

For further questions, please reach out to Niklas Järnström, Manager, Sales Tools, through niklas.jarnstrom@wartsila.com (for direct job applicants only; applications submitted via email will not be recorded or responded to). 

Welcome to join us in shaping the decarbonisation of marine and energy!

Last application date: 26/10/2026

At Wärtsilä we value, respect and embrace all our differences, and are committed to diversity, inclusion and equal employment opportunities; everyone can be their true self and succeed based on their job-relevant merits and abilities.

Please note that according to Wärtsilä policy, voluntary consent for a security check may be required from candidates being considered for this position, depending on the applicable country.

This is Wärtsilä 

Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. Our team of 18,300 professionals, in more than 230 locations in 77 countries, shape the decarbonisation transformation of our industries across the globe. Read more on www.wartsila.com.