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Helsinki, FI Turku, FI Hamburg, DE Belgrade, RS Vaasa, FI

Function:  Digital Technology & Innovation
Job Category:  Digital Technology and Open Innovation

Senior Software Developer (python)

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?


A safer, low-carbon shipping industry is underpinned by data sharing. We at Wärtsilä Voyage are creating the digital infrastructure needed to enable high-performing maritime logistics. Through our world-leading Smart Marine portfolio, we support our customers in their efforts to ensure secure, highly energy-efficient and cost-effective marine operations.
Wärtsilä is on a mission to enable sustainable societies with smart technology. As we change course towards a cleaner, smarter maritime future, we’re looking for top talent to join our team.


We are now looking for a Senior Software Developer to join our Helsinki-based platform team at Wärtsilä Voyage.


Location: The preferred location for the position is in Helsinki, but also other locations in nearby time zones are possible.


What you will be doing


As an infrastructure team we are responsible for ingesting, storing, and processing maritime data and making this available to teams working on customer facing applications like the Fleet Operations Solution (


As software developer, your work will focus on these responsibilities together with your teammates:

  • developing our platform services for time series data processing
  • proactively interacting with stakeholders to figure out requirements
  • debugging and solving production service issues
  • supporting developers in other teams using our platform


In addition to these main responsibilities the role can include anything else you'd like to do in the team. Want to develop application monitoring, metrics and logging?

You can. Interested in CI/CD and software build pipelines? You can. What to improve team Agile ways of working? You can. Or just concentrate on the core development competences? Sure.
You'll be working with a group of six or more developers and data engineers on various projects requiring language skills mostly related to python.


To be successful in this role, we expect you to:

  • express yourself clearly and have a good command of both written and spoken English
  • have good habits of maintaining and creating useful documentation
  • be an experienced python developer with core competencies including
    • Linux operating systems
    • containers
    • test-driven development
    • REST APIs


It’s a plus if you:

  • are an open-source contributors
  • understand the maritime business
  • are competent with
    • Scientific Python ecosystem
    • dealing with time-series data
    • data pipelines
    • Kubernetes
    • CI / DevOps
    • web user interfaces
    • find it motivating to modernize our existing data-processing stack


Why you and us?

We take pride in our culture and community.
Our team is one of the three IoT Data teams part of the Wärtsilä Voyage Tech Office. In our organisation a team is the smallest unit of operation. We set our team goals, define our ways of working, and choose most of the tools we use in our work. We are a self-organized team of closely collaborating team members. Dailies, pair-coding, and code review, for example, are important ways to cooperate. We also have a gang of agile coaches available who we can ask for support in developing our everyday practices and teamwork.


Most of our team members have a developer or engineer background and our hobbies and interests include games of all sorts, go-kart racing, playing the piano, books, circus, cooking, and, of course, sailing. If you enjoy these as well you should fit in just right! And in case you have experiences and interests to add to the list, even better! Our working language is English, but you'll find folks to chat also in Dutch, Chinese, Finnish, and Swedish to name a few.


Our working culture is flexible and based on trust. We appreciate people having different life situations and styles and believe that work should adapt to our personal lives and not the other way around. We have always supported the possibility to work remotely and expect people to manage their own work responsibly. It's important for us that you find this team as a place to grow and develop your career aspirations in a friendly and inclusive environment.


Contact & next steps

We hope to hear from you before the application deadline 12.10.2022, through submitting your application through our career’s portal. We aim to keep you updated on the process all the way.


Are you still wondering if you should apply and would like to get something clarified?

Please reach out to Lauri Kovanen, Director IoT Data by sending an email to with any questions related to this position (only for questions from direct job applicants, applications through email will not be recorded or responded to).



Last application date: 12/10/2022


All new Wärtsilä employees in Finland will attend occupational health check, including the drug test/screening. The legislation of the country followed when person is located outside of Finland.


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.

This is Wärtsilä

Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. We emphasise innovation in sustainable technology and services to help our customers continuously improve their environmental and economic performance. Our dedicated and passionate team of 17,000 professionals in more than 200 locations in 68 countries shape the decarbonisation transformation of our industries across the globe. In 2021, Wärtsilä’s net sales totalled EUR 4.8 billion. Wärtsilä is listed on Nasdaq Helsinki. Find out more at