Back-End Developer

Job Description

Wärtsilä is a world leader in marine technology and leading the industry's transformation towards a decarbonised and sustainable future. With the world's widest portfolio and service network, we - Wärtsilians - deliver efficient, safe and sustainable integrated products and solutions to enhance the business of our customers. The opportunities presented through digitalisation and new technologies are offering a new era of shipping. Did you know that shipping is the world's most efficient mode of transportation and that 88% of the world's trade is carried by sea?

We want to change the course towards an interconnected and cleaner maritime future and are constantly on the lookout for future-oriented talent to join our team and to work towards enabling sustainable societies through innovation in technology and services - together. Are you ready to jump onboard?

What you'll do

You'll be at the core of a data-intensive platform powering hundreds of installations worldwide.

• Design and build scalable backend services, APIs, and data pipelines
• Work on our streaming data platform (real-time data processing, ingestion, and distribution)
• Ensure systems are reliable, observable, and performant
• Contribute to data modeling, database design, and architecture decisions
• Collaborate with front-end developers to deliver seamless end-to-end features
• Set up and improve monitoring, logging, and data quality checks
• Take ownership from development to deployment and production operations
• Continuously improve systems through experimentation and innovation

What you bring

• A degree in Computer Science (or similar) or 3+ years of experience
• Strong backend development skills (Java and/or Python)
• Experience with:
  • API design and distributed systems
  • Data streaming or messaging systems (e.g., Kafka)
  • Cloud infrastructure (AWS) and containerization (Docker, Kubernetes)
• Solid understanding of DevOps practices, CI/CD, and system reliability
• Experience with databases (relational and/or time-series)
• A mindset focused on performance, scalability, and maintainability
• Ability and willingness to collaborate across the stack, including front-end teams
• Experience working in Agile/Scrum environments

Nice to have

• Exposure to front-end development (TypeScript/JavaScript)
• Experience with data-intensive applications or analytics platforms
• Familiarity with industrial protocols (OPC-UA, Modbus, NMEA)
• Interest in UX or data visualization

Why join us?

At Wärtsilä, you'll work on systems that truly matter-at scale and in the real world.

• Build and operate high-impact backend systems used globally
• Own your services end-to-end: design → build → run
• Work in a culture of trust, ownership, and collaboration
• Expand your skill set across cloud, data, and full-stack development
• Contribute to solutions that support sustainable energy and decarbonisation

We encourage curiosity, initiative, and continuous learning. You'll be part of a team where your ideas are heard and your growth is supported.

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.

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

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.