Senior Software Development Engineer

If you're passionate about making a real impact, Wärtsilä Voyage R&D is the place for you. Our team is dedicated to managing multiple core services, including maintenance of past achievements, while continuously innovating by developing new ones. We actively refine business processes to ensure ongoing improvement and excellence, leveraging Agile and SAFe practices to enhance our efficiency and collaboration.Job Description:
We are looking for a Senior Software Development Engineer to join our team working for a better future. The location for this position is in Belgrade, Serbia.

In our team you will:
Develop cloud based services and cover you code with tests
Create system architecture and documentation
Co-own and support our team's portfolio
Plan the future of the product by participating the discovery activities
Optimization of performance, efficiency and cost of the solution
Keep our codebase up to date
Contribute to internal processes, for example knowledge-sharing sessions, improving the developer experience
Collaborate with other teams, experts and stakeholders

Main requirements:
Degree in Computer Science, Engineering, Physics, Math or relevant*
6+ years of working experience in commercial web development
Understanding the principles of distributed systems development
Knowledge and practice with OOP, SOLID, KISS and Boy Scout Rule
Experience with containerization
Fluent English

We develop using:
Platform: .Net 6 - 10, C#, ASP.NET MVC/WEB API 2, .Net Framework
Auth: Entra ID, OAuth 2.0, Certificates
Messaging: Service Bus, EventHub
Secure storage: KeyVault, 1Password
Monitoring: Application Insights Graylog, DataDog
Test: NUnit, NSubstitute, AutoFixture
Infrastructure: GitHub, Nginx, Traefik, Docker, K8s
Storage: MS SQL Server, CosmosDB, Azure Storage

Last application date: 11/09/2025 

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.

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.