At Sii Sweden we are committed to building innovative digital solutions working on exciting projects for our customers across various industries, with a strong focus on quality.

We are seeking a skilled and detail-oriented .NET System Developer to join one of our customers’ teams. The ideal candidate will be experienced in designing and developing robust, scalable, and secure enterprise applications using the Microsoft .NET technology stack.

Your tasks

• Design, develop, and maintain C# .NET applications and libraries
• Build and enhance web applications using ASP.NET MVC
• Implement and optimize SQL Server databases and stored procedures
• Collaborate in system architecture and solution design discussions
• Analyze and manage customers’ and Product Owner’s requirements
• Build front-end components using HTML5/CSS3 or equivalent technologies
• Participate in code reviews, testing, and deployment activities
• Create system documentation
• Work cross-functionally with project managers, QA engineers, and UI/UX designers, and cooperate with sales and support teams

Requirements

• Bachelor’s degree in Computer Science, Software Engineering, or a related field
• Strong experience with C# .NET and ASP.NET MVC
• Solid understanding of SQL Server (queries, performance tuning, database design)
• Hands-on experience with SOAP/XML, WCF, and JSON
• Familiarity with Visual Basic .NET
• Proficiency in HTML5/CSS3 or similar front-end technologies
• Experience in software architecture and system design
• Ability to write clean, scalable, and well-documented code
• Excellent problem-solving and debugging skills
• Fluency in written and spoken English

Nice-to-have requirements

• Fluency in written and spoken Swedish