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.Net Developer at Trinetix. You’ll be part of a dynamic, international team working on large-scale enterprise platforms for a leading U.S.-based client in the consulting and financial services sector. Our mission is to build impactful, high-tech solutions that streamline business operations, enhance efficiency, and drive digital transformation. . We focus on solving real business challenges—developing robust platforms that support critical decision-making and operational excellence. Our projects span across continents, offering the opportunity to collaborate with top-tier professionals from around the world. Welcome to join a Global Team Driving Real-World Innovation. . Strong expertise in .NET Core, ASP.NET Core . Strong foundation in the object-oriented programming and design principles (OOP/OOD/SOLID/GOF) . Solid understanding and practical experience with async programming, multithreading . Web App lifecycle, security, error handling . Intermediate English .  . Nice-to-haves.  . Experience with Azure (App Services, Functions, Storage, Service Bus, etc.)  . Proficiency in writing T-SQL queries for MS SQL Server .  . Core Responsibilities.  . Analyzing existing features . Developing key features . Taking part in the planning and implementation of requirements, refactoring, and optimization .  . Expected qualifications.  . . Build and deliver complex features with confidence.  . You take ownership of major parts of a project, building advanced features that meet both technical and business needs. . . Make smart technical decisions and contribute to design discussions.  . You can design and implement solutions independently, and you help shape system architecture to support scalability and long-term goals. . . Support and mentor junior developers.  . You share your experience with less-experienced teammates, offering guidance on code quality, design choices, and development best practices. .  . What we offer.    . Continuous learning and career growth opportunities . Professional training and English/Spanish language classes   . Comprehensive medical insurance . Mental health support . Specialized benefits program with compensation for fitness activities, hobbies, pet care, and more . Flexible working hours . Inclusive and supportive culture . Company Location: Poland.