Middle/Senior .NET Developer – Construction

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Sigma Software Group

WebsiteLinkedInAll Job Openings

1001 - 5000 employees

Founded 2002

💼 Consulting

🏥 Healthcare

🚘 Automotive

Consulting • Healthcare • Automotive

Sigma Software Group is a multinational company, established in 2002, that specializes in providing high-quality software development, graphic design, testing, and support services. The company focuses on delivering solutions across various industries such as automotive, telecommunications, aviation, advertising, gaming, banking, real estate, and healthcare. Sigma Software values professional growth, offers remote work opportunities worldwide, and caters to world-renowned clients like AstraZeneca, Scania, and SAS. The company emphasizes a culture of continuous education, mentorship, and flexible work environments, making it a preferred workplace for IT specialists aiming to work on complex solutions utilizing cutting-edge technologies. Sigma Software is committed to innovative solutions and engineering the future while also contributing to social causes such as charitable work in Ukraine.

📋 Description

• Design, develop, and maintain robust back-end solutions using C# and .NET • Participate in architecture discussions and technical solution design • Develop and integrate RESTful APIs and SOAP web services • Develop core modules and perform refactoring when necessary • Collaborate with developers, QA engineers, DevOps specialists, architects, and Product Owners • Clarify business and technical requirements with internal and customer-side teams • Write and maintain unit, API, and integration tests • Participate in peer code reviews and follow engineering best practices • Investigate and introduce new technologies and technical improvements • Troubleshoot issues across application, infrastructure, and database layers • Prepare and maintain technical documentation • Contribute to front-end tasks using Angular and TypeScript when needed

🎯 Requirements

• 4+ years of commercial software development experience with C# and .NET • Strong experience designing, developing, and integrating Web APIs, including RESTful APIs and SOAP services • Solid understanding of OOP, SOLID principles, and common design patterns • Strong knowledge of Microsoft SQL Server and T-SQL • Practical experience with LINQ, ADO.NET, and Entity Framework • Experience working with event-driven systems and message brokers • Experience writing and maintaining unit, API, and integration tests • Experience with Angular or another modern front-end framework/library • Good knowledge of TypeScript • Understanding of front-end architecture, maintainability, and performance optimization • Strong troubleshooting and debugging skills across application, database, and infrastructure layers • Confident Git usage, including branching strategies, pull requests, and code reviews • Intermediate or higher English level • Strong communication skills and ability to work collaboratively in a cross-functional environment • Experience with NoSQL databases is a plus • Experience using AI-assisted development tools such as GitHub Copilot or Claude is a plus