Senior Full Stack Developer (.NET & React)

Role Overview: As a Senior Full Stack Developer at Keyloop, you will be responsible for owning the full product development lifecycle, from API design to UI implementation. You will work on features that serve enterprise clients and contribute to creating innovative technology solutions that enhance the digital transformation of car dealers and manufacturers. Key Responsibilities: - Design and develop complex, enterprise software solutions across the full technology stack, including .NET backend and React frontend - Build APIs and integrations to connect multiple systems and deliver seamless experiences - Own code quality through rigorous testing, code reviews, and thoughtful architectural decisions - Solve complex problems by evaluating requirements, making technology recommendations, and delivering robust solutions - Mentor and collaborate with junior developers and cross-functional teams to drive innovation - Lead incident response and ensure operational excellence for the platform - Embrace AI-assisted development using modern tools like Claude and GitHub Copilot to accelerate delivery and explore new possibilities Qualifications Required: - 4-6 years of professional software development experience - Strong proficiency with C#, .NET 6+, .NET Core, ASP.NET MVC/Web API, and Entity Framework on the backend - Solid experience building production React applications with JavaScript, Redux, Hooks, and React Context API on the frontend - Experience with REST and SOAP APIs, Web Services design, and database architecture (both SQL and NoSQL) - Hands-on experience with automated testing frameworks such as xUnit, nUnit, Jest, Moq, and nSubstitute - Proficiency with Git/GitHub and modern version control workflows - Comfortable working in Agile/Scrum environments - Bachelor's degree in Computer Science, Engineering, Mathematics, or equivalent professional experience - Strong fundamentals in object-oriented design patterns and clean code principles (SOLID, design patterns) - End-to-end understanding of the full SDLCfrom requirements through operations - Problem-solving mindset with a focus on identifying root causes and preventing recurrence - Quality-first approach with emphasis on rigorous testing, code reviews, and thoughtful design - Attention to detail to identify edge cases, security issues, and performance concerns before production Additional Company Details: "At Keyloop, AI is a daily ally: We encourage and train every employee to use our AI tools to boost their creativity and productivity." Role Overview: As a Senior Full Stack Developer at Keyloop, you will be responsible for owning the full product development lifecycle, from API design to UI implementation. You will work on features that serve enterprise clients and contribute to creating innovative technology solutions that enhance the digital transformation of car dealers and manufacturers. Key Responsibilities: - Design and develop complex, enterprise software solutions across the full technology stack, including .NET backend and React frontend - Build APIs and integrations to connect multiple systems and deliver seamless experiences - Own code quality through rigorous testing, code reviews, and thoughtful architectural decisions - Solve complex problems by evaluating requirements, making technology recommendations, and delivering robust solutions - Mentor and collaborate with junior developers and cross-functional teams to drive innovation - Lead incident response and ensure operational excellence for the platform - Embrace AI-assisted development using modern tools like Claude and GitHub Copilot to accelerate delivery and explore new possibilities Qualifications Required: - 4-6 years of professional software development experience - Strong proficiency with C#, .NET 6+, .NET Core, ASP.NET MVC/Web API, and Entity Framework on the backend - Solid experience building production React applications with JavaScript, Redux, Hooks, and React Context API on the frontend - Experience with REST and SOAP APIs, Web Services design, and database architecture (both SQL and NoSQL) - Hands-on experience with automated testing frameworks such as xUnit, nUnit, Jest, Moq, and nSubstitute - Proficiency with Git/GitHub and modern version control workflows - Comfortable working in Agile/Scrum environments - Bachelor's degree in Computer Science, Engineering, Mathematics, or equivalent professional experience - Strong fundamentals in object-oriented design patterns and clean code principles (SOLID, design patterns) - End-to-end understanding of the full SDLCfrom requirements through operations - Problem-solving mindset with a focus on identifying root causes and preventing recurrence - Quality-first approach with emphasis on rigorous testing, code reviews, and thoughtful design - Attention to detail to identify edge cases, security issues, and performance concerns before production Additional Company Details: "At Keyloop, AI is a daily ally: We encourage and train ev