Math Modeler

• Wärtsilä is hiring a Math Modeler to develop dynamic mathematical models for vessel equipment and systems for its market-leading marine engineering simulators.
• The position is preferably based in Helsinki (Turku negotiable) with hybrid work and includes creating simulator front-ends, compiling technical documentation, and maintaining existing models.
• Required qualifications include a Bs or MS in physics, applied math or engineering, practical experience in imitation modelling, basic knowledge of numerical methods for PDEs/DAEs, OOP, and intermediate English.
• Familiarity with Modelica, a marine engineering background, and agile experience are advantageous, and applications must be submitted via Wärtsilä’s careers portal by 21/09/2026.

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 through innovation in technology and services. As we change course towards a cleaner, smarter maritime future, we’re looking for top talent to join our team. Are you ready to join the Voyage?

Wärtsilä Voyage is a high-tech, modern development centre, which has dozens of unique specialists. The company actively uses flexible development methodologies, a developed technological culture allows creating unique technical solutions.

We create integrated technological solutions to improve the safety and efficiency of shipping, navigation, and ship operations.

The team of Wärtsilä marine engineering simulators is looking for Math Modeller. You can become part of a team which works on a market leader product (45% market share) that imitates marine engineering functionality for vessels. The preferred location for this position is Helsinki, Finland but also Turku, Finland is negotiable. We offer a possibility to hybrid work.

Main responsibilities:

• Develop from the scratch for dynamic math models of vessel equipment and systems.
• Create front-end side of simulators.
• Compile technical documentation for these models.
• Maintain existing models.
• Take a part in agile activities.

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

• Bs or MS in physics, applied math, engineering or similar field.
• Practical experience in imitation modelling of physical systems.
• Basic knowledge of numerical methods for solving PDE and DAE.
• Basic knowledge of OOP approach or any OOP language.
• Be able to formulate a problem correctly and plan ways to solve it.
• English intermediate or higher.
• Be agile.

We will be amazed if you have (but not mandatory):

• Be familiar with Open Modelica or any Modelica-based language.
• Be able to quickly master new tools.
• Have a background in marine engineering.

Practical experience in imitation modelling required in one of the areas:

• Hydraulics (gravity flow, pumping through pipeline, pump characteristics, pipeline elements’ resistance, Bernoulli equation, two-phase media flow (liquid + gas)).
• Heat Transfer (heat capacity of materials – solid, liquids, gases; heat exchange between various media; temperature transfer & temperature resistance of materials).
• Thermodynamics (ideal gas laws; real gas specifics; main thermodynamics parameters and characteristics, its interdependencies; thermodynamics laws; phase transitions).
• Mechanics (kinematics and dynamics of rigid body, rotational dynamics equations; mechanical energy parameters and equations, mechanical energy transitions, inertia characteristics; simple mechanisms).
• Automation and regulation (main principals and parameters; governors (controllers) – main types and work principals; controlled system parameters and dynamic).

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. We aim to keep you updated on the process throughout.

For further questions, please reach out to Bogdan Doroslovac, People Manager, Tribe Marine Simulation through [email protected] 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: 21/09/2026 

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.

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

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.