Fullstack Developer (.NET + React)

Expected, .NET, .NET Core, C#, Microsoft SQL Server, Git Operating system, Windows About the project, We are seeking a Fullstack Developer (.NET+React) to join a client building educational systems. The ideal person will have practical fullstack experience, strong awareness of performance and security implications across layers, and the ability to write efficient, maintainable code that keeps databases and servers stable. Your responsibilities, Design, develop and maintain web applications using .NET and .NET Core (C#) following MVC/MVVM patterns., Implement client-side features using React and Sencha ExtJS; adapt approaches from other frameworks (Angular, Vue, etc.) when needed., Work with large data sets in MS SQL Server, writing and optimizing queries and data access code to minimise database costs and latency., Review and improve code to prevent performance regressions and security issues across the stack., Collaborate with the team on architecture, code quality, version control (GIT and SVN), and deployment practices., Troubleshoot production incidents and contribute to capacity planning and performance tuning. Proven experience with .NET and .NET Core (C#) in web applications using MVC or MVVM patterns., Practical knowledge of client-side development with React/Angular/Vue and experience or familiarity with Sencha ExtJS or similar component frameworks., Strong experience with MS SQL Server and handling large datasets; ability to write efficient queries and design data-access layers with cost-awareness., Solid understanding of web application performance and security considerations across backend and frontend layers., Experience using GIT and/or SVN., Problem-solving mindset, attention to code quality, and experience working in cross-functional teams. What we offer, Remote working., Unique TEAL culture, relationship- and respect-driven community, non-corporate atmosphere., Agile approach and no bureaucracy., Outstanding integration trips to various places in Europe for all employees., Activities to support your well-being and health., Luxmed Gold Extended medical care and Multisport Plus benefit. This is how we work on a project, documentation, issue tracking tools, testing environments Benefits, sharing the costs of sports activities, private medical care, sharing the costs of professional training & courses, remote work opportunities, flexible working time, integration events Recruitment stages, CV Screening, Initial Interview (Online), Skills Assessment (Remote), Final Interview & Offer We encourage qualified candidates to apply via the application form. Applicants will be considered on the basis of their skills and experience. YOUR ITEAMS sp. z o.o., Our business philosophy had been clarifying for a good few years, during which we gained experience in large and influential corporations. Based on well-established knowledge and best practices, we decided to build a Teal organisation in which we can fully:, , • realize our mutual passion for IT,, • professionally support our clients in this area,, • use the best standards born from our experience,, • have fun creating a harmonious community,, • stay true to our values and treat every person with respect,, • say goodbye to hierarchical treatment and lack of empowerment,, • have a smile on our lips when we think about the next Monday, This is how we work,