If you're passionate about making a real impact, Wärtsilä Voyage R&amp;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 StorageLast 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 <a href="http://www.wartsila.com">www.wartsila.com</a>.

We enable sustainable societies through innovation in technology and services together with all our stakeholders &ndash; today and tomorrow. We emphasise innovation in sustainable technology and services to help our customers continuously improve environmental and economic performance. We work together with our strong ecosystem of partners every day, providing a wide portfolio of leading technologies and innovative solutions that offer our customers superior uptime, reliability and foreseeable lifecycle costs across their operations. Our global passionate team of 17,500 energy and maritime experts in 200 locations in more than 70 countries is committed to shaping decarbonisation transformation of our industries across the globe.

Senior Software Development Engineer

If you're passionate about making a real impact, Wärtsilä Voyage R&amp;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. &nbsp;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 &nbsp;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 &nbsp;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 StorageLast application date: 11/09/2025&nbsp;&nbsp;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.&nbsp; 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.&nbsp;This is Wärtsilä&nbsp;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 <a href="http://www.wartsila.com">www.wartsila.com</a>.&nbsp;

Senior Software Development Engineer

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Wartsila

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