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Helsinki, FI

Function:  Digital Technology & Innovation
Job Category:  Research & Development

Senior Prototype Developer

Senior Prototype Developer


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 with smart technology, and our Smart Marine and Energy visions 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 cleaner 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 now looking for Senior Prototype Developer to join our team working for a better future. 

Wärtsilä Voyage Rapid Innovation Team is focused on designing new products and services, which are based on real-life onboard and onshore experiences. They are tested and evaluated together with customers before starting the fully committed R&D work. Our cross-competence team uses evidence-based design methods to create and validate hypotheses that will lead us to feasible service and product prototypes.
We work on forward-looking development projects, which will help shape the marine industry; One day, you might work on concepts around autonomous shipping and the next day deep dive into paperless vessels. As part of our team, you’ll be building on top of each other’s ideas, experiment fearlessly with technology and seek to understand the bigger picture. We offer you the possibility to work alongside of our great team of captains, software developers, technical architects and service & UX designers.


The position is offered on a permanent basis and the successful candidate will be based in Helsinki, Finland.


What will you be doing?

As a Senior Prototype Developer, you work in a cross-competence team providing technical expertise to the team. Responsibilities can be divided into three main categories:
1.    Understanding and digesting existing systems and how they can be utilized or further developed
2.    Designing new features to existing system or creating completely new architectures
3.    Proving new concepts and designs by implementing prototypes to different levels of maturity
We work within full Wärtsilä Voyage product scope and often even beyond that. Implementation technologies are as varying as are the products. In this position you need solid experience on several different implementation technologies and environments, and good attitude towards learning new technology and development environments. And more importantly you embrace learning by doing. 
Prototype development is iterative, and we don’t always get it right the first time. Depending on the project the prototypes we make end up with different maturity level and we must always think what is the most important thing that the prototype must have and what can be left to the next phase. As Senior Prototype Developer you should enjoy constant changes in direction and be able imagine somewhat incomplete solutions as complete.
We are a cross-competence team where people usually look at the same thing from different perspectives and communicating your point of view is important. We also have a lot of communication with product teams and customers, so good communication skills both spoken and written.


You will shine in this role if you have:

  • 5+ years software development experience
  • Experience in more than one development environments and technologies. Some examples:

           o    Frontend tech: React, WebGL
           o    Programming languages: Javascript, CSS, Python, Rust, C, C#, Java
           o    Operating systems: Linux, Windows
           o    Development environments: VSCode with Azure and Microsoft Edge DevTools extensions, Unity
           o    Software packaging: Docker, Kubernetes
           o    Cloud stack: Azure

  • Ability and willingness to learn new things on the fly
  • Inquisitive mind to understand how stuff works
  • Ability to work in agile way and openness to new ways of working
  • Ability to prioritize the work that is currently needed to take the prototype to the next level
  • Good communication skills
  • Any prior experience in marine industry


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?


Contact & next steps

We hope to hear from you before the application deadline 15.8.2022, through submitting your application via 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 through email 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: 15/08/2022

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 check, including the drug test/screening. The legislation of the country followed when person is located outside of Finland.


This is Wärtsilä

Wärtsilä Voyage transforms how vessels perform their journeys and ports manage their operations by leveraging the latest digital technologies. Using data and AI-driven software, we deliver real-time insights into operations, performance, and energy use to enhance safety, efficiency, and reliability, saving fuel and minimising emissions. Our solutions combine bridge infrastructure, cloud data services, decision support systems, and smart port solutions to enable shore-to-shore visibility. We are committed to building an end-to-end connected digital ecosystem for shipping where all vessels and ports are integrated, and all operations are safe and sustainable. 

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