Back-end Developer

Join Wärtsilä as a Back-End Developer to design and build scalable backend systems, working across the stack and owning systems end-to-end. You will contribute to a data-intensive platform powering hundreds of installations worldwide, collaborating with front-end developers to deliver seamless end-to-end features.

Requirements

• Degree in Computer Science 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, cloud infrastructure, and containerization
• Solid understanding of DevOps practices, CI/CD, and system reliability
• Experience with databases and 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

Benefits

• 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