Back-end Developer

Back-End Developer (with Front-End Exposure)

Join us in building scalable technology that drives a more sustainable future.

We’re looking for a Developer who thrives on designing and building robust backend systems—but also enjoys seeing their work come to life in the front end. If you like working across the stack and owning systems end-to-end, this role is for you.

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.