Software Developer, Backend/Fullstack

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 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 a Full stack or Backend software developer, whose focus will be Wärtsilä’s new customer facing portal, MyWärtsilä. Our new portal will offer an extensive range of products and services to our customer base, and ensuring outstanding technical setup and performance is key to its success. The preferred location for this position is Helsinki, however Vaasa and Turku are also possible. Our teams typically work in hybrid mode.  

Your role and responsibilities 

As a Software developer, backend/Full stack, you will play an important role in the development of our new B2B customer portal, which is the principal digital touchpoint for our global customer base. You will work hands-on with a talented team of experienced developers, ensuring that our architecture, databases, back-end logic and APIs enable the new portal to meet its commercial goals.

You’ll be working as a part of skilled Platform Engineering and Developer Services team with diverse expertise. You’ll also be part of our “full stack” product team, working alongside our Product Owner, Scrum master, designers, developers and other experts to deliver working software which helps Wärtsilä achieve our business goals. 

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

• Several years of experience in back-end software development
• Strong skills in technologies such as Node.js, TypeScript, AWS CDK (must have), AWS,  Azure (advantage), DynamoDB, PostgreSQL, Docker
• A proactive attitude, taking ownership of your work and working well with others
• Ensure best practices in software development to support long-term growth

As an ideal candidate, you would have:

• Hands-on development experience core skills being Node.js, TypeScript, AWS CDK (must have), AWS , Azure (advantage), DynamoDB, PostgreSQL, Docker
• Additional Skills:
  • Event-driven architecture: SNS, SQS, EventBridge
  • Monitoring/observability: Datadog, CloudWatch, logging best practices
  • Security best practices: IAM policies, API authentication (Cognito/OIDC)
  • CI/CD expertise: infrastructure as code
  • Scalability: database tuning (Dynamo/Postgres)
  • Experience in Salesforce integrations
  • Python
  • Experience with integration technologies (REST)
  • Experience of DevOps practices
  • Self-driven, supportive, analytical and goal-focused, with a 'can do' attitude
  • Keen interest in new frameworks and programming languages
  • Experience working in cross-functional and international teams
  • Excellent collaboration skills
  • Excellent language skills, fluent written and oral English 

Why you and us?  

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

We are authentic and honest, and we strongly believe in that by being your own 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 by 06.01.2026. We aim to keep you updated on the process throughout.

For further questions, please reach out to Juha Kalliokoski, GM Platform Engineering and Developer services through juha.kalliokoski@wartsila.com with any questions related to this position (only for questions from direct job applicants, applications through email will not be recorded or responded to).

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

Last application date: 06/01/2026 

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.

All new Wärtsilä employees in Finland will attend occupational health checks, including drug tests/screenings where applicable. When a person is located outside of Finland, the country legislation is followed.

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. 

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