Senior .NET Developer

On behalf of our Client from Denmark , Mobilunity is looking for a Senior.Net Engineer.

Our client is a well-established European company operating in the construction and infrastructure space, delivering innovative digital solutions that support operational efficiency and project execution. With a strong focus on reliability and long-term partnerships, the company is continuously evolving its internal platforms to better serve both business and end users.

We are looking for a Senior .Net Developer to join a growing engineering team responsible for maintaining and improving core business systems. This is a hands-on role focused on building and enhancing APIs, resolving real-world production issues, and ensuring system stability and performance.

You will work closely with support and cross-functional teams, contributing directly to the reliability and scalability of business-critical applications.

Responsibilities:

• Design, develop, and maintain backend services and APIs
• Troubleshoot, debug, and resolve production issues in a timely manner
• Analyze root causes of system problems and implement sustainable solutions
• Optimize application performance and database interactions
• Collaborate closely with support teams to address real user issues
• Contribute to continuous improvement of system stability and code quality
• Participate in code reviews and follow best engineering practices

Requirements:

• Strong experience in backend development
• Solid knowledge of .NET (C#, ASP.NET Core)
• Experience working with SQL databases (e.g., MS SQL Server), including:
  
  • Writing complex queries
  • Stored procedures
  • Performance optimization
• Understanding of RESTful APIs and web services
• Experience with Git or similar version control systems
• Good understanding of software architecture principles and design patterns
• Strong debugging and troubleshooting skills in production environments
• Strong English level

Will be a plus:

• Experience with Docker or containerization
• Familiarity with PostgreSQL and basic Linux knowledge
• Exposure to CI/CD pipelines and automation practices

In return we offer:

• The friendliest community of like-minded IT-people
• Open knowledge-sharing environment — exclusive access to a rich pool of colleagues willing to share their endless insights into the broadest variety of modern technologies
• Mobilunity Medical Insurance program designed to attend our teams’ needs
• Paid vacations and sick leaves, including 5 paid days per year that don’t require a sick note
• No open-spaces setup — separate rooms for every team’s comfort and multiple lounge and gaming zones on all of the 3 floors
• English classes in 1-to-1 & group modes with elements of gamification
• Neverending fun: sports events, tournaments, music band, multiple affinity groups

Come on board, and let’s grow together!