Senior/Middle .NET Developer

Join a team building a large-scale marketplace platform used by millions of customers worldwide. We are looking for a Middle/Senior .NET Developer with strong expertise in distributed systems, integrations, and scalable Back-end development to contribute to the evolution of a modern E-commerce ecosystem. In this role, you will work with complex enterprise systems, support the integration of a new e-commerce platform into the main ecosystem, and help improve the platform’s scalability, reliability, and performance. You will collaborate with cross-functional international teams and participate in the full software development lifecycle. CUSTOMER Our Customer is a leading international marketplace specializing in pet products, operating a large-scale digital commerce ecosystem with millions of users and extensive product catalogs. The company continuously invests in scalable technology solutions and reliable operational systems to deliver seamless online shopping experiences and support substantial transaction volumes across its marketplace services. PROJECT The project focuses on the development and optimization of a high-load e-commerce marketplace platform supporting catalogs, pricing, inventory, suppliers, and operational services. The position is within a newly formed team responsible for integrating a platform into the main ecosystem. Technologies: .NET Framework 4.8, C#, MSMQ, WCF, SQL Server, NCache, Distributed Systems, Event-driven Architecture. Job Description Design, develop, and maintain robust backend solutions using .NET Framework 4.8 and C#Take ownership of features throughout the full development lifecycle, from requirements analysis to production deploymentDevelop clean, maintainable, scalable, and well-tested code following engineering best practicesSupport, optimize, and troubleshoot distributed messaging and service-oriented systems built with MSMQ and WCFDesign and optimize SQL Server database structures, queries, indexes, and stored proceduresImplement and maintain distributed caching solutions using NCache or similar technologiesParticipate in architectural discussions focused on scalability, reliability, and system performanceCollaborate closely with developers, QA engineers, DevOps specialists, and product stakeholdersContribute to system monitoring, troubleshooting, and production issue resolutionEnsure high standards of application performance, security, and maintainability Qualifications 4+ years of commercial software development experience with .NET and C#Familiarity with .NET Framework 4.8Solid understanding of OOP principles, system design, and software architectureHands-on experience with MSMQ and WCF or similar technologiesGood SQL Server knowledge including relational database design, query optimization, indexing, and T-SQLExperience working with distributed caching solutions such as NCache or similar toolsUnderstanding of distributed systems and event-driven architecture principlesExperience with unit, integration, and performance testingFamiliarity with non-functional requirements including scalability, security, high availability, and performance optimizationAt least Upper-Intermediate English level