Fullstack Developer with C#.NET & React - Krakow- Hybrid

We Are Hiring: Senior Full Stack Developer (.NET and React) We are seeking an experienced Full Stack Developer who is ready to play a key role in designing, building, and improving enterprise-level applications. This position is ideal for someone who enjoys working across the entire technology stack, contributing to architectural decisions, enhancing user experiences, and ensuring application reliability and performance. This is a senior-level opportunity for a professional who combines deep technical expertise with strong analytical thinking and a proactive mindset. Key Responsibilities • Contribute to system architecture planning and technical design discussions • Drive user interface enhancements to improve usability, performance, and overall application resilience • Apply industry-recognized design principles and architectural patterns when implementing solutions • Review and interpret business and technical requirements, proposing improvements where appropriate • Produce clear and detailed technical documentation for developed features and systems • Build proof-of-concept solutions and prototypes to validate architectural approaches • Oversee and manage system modifications within structured service management processes • Support and enhance automation initiatives across development and operational workflows • Deliver high-quality technical support, ensuring timely resolution of issues • Collaborate closely with stakeholders to understand objectives and provide effective solutions Required Qualifications and Experience • A minimum of Five years of professional experience developing and maintaining production-grade applications within the .NET ecosystem • Strong proficiency in C# and Web API development, with experience building secure, scalable, and high-performing backend services • Solid hands-on experience with React, developing dynamic, responsive, and performance-optimized web applications • Advanced knowledge of database architecture and SQL Server, including complex query development, performance optimization, and tuning • Practical experience with continuous integration and continuous delivery pipelines • Comprehensive understanding of the Software Development Life Cycle, from requirements analysis through deployment and ongoing support • Strong command of modern web standards including HTML5 and Cascading Style Sheets, with the ability to create intuitive user interfaces • Excellent analytical and troubleshooting abilities, particularly in demanding production environments • High attention to detail and commitment to delivering robust, maintainable solutions If you are passionate about developing high-quality software, improving system performance, and contributing to meaningful technical decisions, we would welcome the opportunity to connect with you. Please feel free to reach out directly or share this opportunity within your professional network. #Hiring #FullStackDeveloper #DotNet #React #SoftwareEngineering #TechnologyCareers