Senior .NET Developer with WPF and REST APIs, Portfolio Management System

Project overview The project focuses on building and evolving a Portfolio Management System that includes backend services, messaging, and desktop-based user interfaces. The solution integrates multiple systems, processes large volumes of data, and supports continuous delivery through automated pipelines. Team You will work in a cross-functional team consisting of backend developers, desktop developers, QA engineers, and DevOps specialists. The team collaborates closely through code reviews, shared technical discussions, and iterative delivery. Position overview We are looking for a Senior .NET Developer to work on a long-term Portfolio Management System that combines backend services, desktop applications, and system integrations. You will be involved in designing, developing, and maintaining reliable software solutions that support complex business processes and data-intensive workflows. Technology stack C#, .NET, Entity Framework, ADO.NET, MS SQL Server, RESTful APIs, RabbitMQ, CI/CD pipelines, VSTO, WPF, WCF, Win Services, ASP.NET, MS Azure, and TeamCity Responsibilities • Design and develop backend services using C# and .NET • Develop, support, and enhance WCF services to enable reliable internal and external system integrations • Implement and maintain RESTful APIs for internal and external integrations • Work with MS SQL Server using Entity Framework and ADO.NET • Develop and support desktop applications using WPF and VSTO • Integrate asynchronous messaging solutions using RabbitMQ • Collaborate with the team on architecture decisions and technical improvements • Participate in code reviews, contribute to code quality, and maintainability • Support CI/CD processes and ensure smooth delivery of new features Requirements • Commercial experience with C# and the .NET platform • Hands-on experience developing VSTO-based solutions • Experience developing backend applications and RESTful APIs • Hands-on experience developing and maintaining WCF services • Strong practical experience with Entity Framework and ADO.NET • Practical knowledge of MS SQL Server and relational database design • Experience with WPF for desktop application development • Familiarity with message queues, preferably RabbitMQ • Understanding of CI/CD principles and automated delivery pipelines • Ability to work collaboratively in a team-oriented environment Nice to have • Exposure to large-scale or enterprise-level systems • Experience in maintaining legacy applications alongside new development • Basic knowledge of application performance optimization and troubleshooting What We Offer: • Vacation days: Up to 26 business days per year. • 10 illness/special days off per year (fully paid, no medical papers needed) for all contract types • Health and life insurance (Luxmed) • MyBenefit platform with Multisport option • Internal psychological support service • English language classes from the first working day • Access to external learning platforms: O’Reilly, LinkedIn Learning, Udemy, and a wide catalog of diverse internal training • Flexible workplace: work from the office, from home, or choose a hybrid option • Tech Skills Mentoring Program • Opportunities to develop as a public speaker, mentor, or technical interviewer • Fully paid idle (bench) when not involved in a project • Certification reimbursement (AWS, GCP, Microsoft, etc.)