Middle/Senior .NET Developer (Construction)

Sigma Software is seeking a skilled Middle/Senior .NET Developer to join a product-focused engineering team dedicated to the European construction industry. You will work within a mature, distributed environment to develop and maintain robust back-end solutions while contributing to architecture discussions and product evolution.

Key responsibilities

• Design, develop, and maintain high-quality back-end solutions using C# and .NET.
• Develop and integrate RESTful APIs and SOAP web services.
• Collaborate with cross-functional teams including QA, DevOps, and Product Owners to clarify requirements.
• Write and maintain comprehensive unit, API, and integration tests.
• Participate in peer code reviews and contribute to technical documentation.

Requirements

• 4+ years of commercial experience with C# and .NET.
• Strong proficiency in Microsoft SQL Server, T-SQL, LINQ, and Entity Framework.
• Solid understanding of OOP, SOLID principles, and design patterns.
• Experience with event-driven systems and message brokers.
• Practical knowledge of Angular and TypeScript for front-end tasks.
• Strong troubleshooting skills and intermediate or higher English proficiency.

What we offer

• Opportunity to work on a large-scale product ecosystem for the European construction market.
• Collaboration with a team of senior-level specialists and architects.
• Engagement in long-term projects with a focus on technical excellence and innovation.
• A fully remote working environment within a professional international organization.