Technologies-expected :. NET 6+ Angular 14+ technologies-optional : AWS EKS multithreading about-project : Imagine being part of a company where your skills shape the future of innovative technology. At Sii, we deliver diverse and impactful projects, empowering professionals to grow and excel in their careers. With a strong focus on long-term collaboration, we provide a supportive environment where your expertise is valued, and your ambitions are encouraged. We’re currently on the lookout for a talented Senior Fullstack. NET Developer with Angular to join our experienced team. You’ll have the opportunity to work with a prestigious American client, tackling exciting challenges alongside a highly skilled and collaborative group of professionals. Take your career to the next level—apply now and join us on this exciting journey! responsibilities : Building high-quality, scalable, and maintainable software solutions using. NET and Angular Designing and implementing efficient and clean code aligned with SOLID principles and best practices Participating in the architecture and design of distributed systems, microservices, and advanced solutions Identifying and applying optimizations to improve system performance and maintainability Collaborating with international, cross-functional teams to achieve project goals in a dynamic environment requirements-expected : At least 5 years of experience in. NET development with a focus on. NET 6+ and Angular 14+ Strong foundation in object-oriented design, algorithms, and complex problem-solving Expertise in SOLID principles, Design Patterns, and writing clean, efficient code Hands-on experience with SQL/No SQL databases, microservices, and/or micro frontends Advanced knowledge of CSS and building optimized, responsive UI Residing in Poland required