{"schemaVersion":"jobsearcher.job.v1","id":"cf5b952025c803b849f05293","url":"https://jobsearcher.com/jobs/cf5b952025c803b849f05293","canonicalUrl":"https://jobsearcher.com/jobs/cf5b952025c803b849f05293","title":"Senior Software Developer – .NET Core & React.js","description":"Senior Software Developer – .NET Core & React.jsWe are looking for a Senior Software Developer with expertise in ASP.NET Core and React.js to join our dynamic team. The ideal candidate will have strong backend and frontend development skills, experience designing scalable applications, and a deep understanding of modern web technologies. You will play a key role in building and maintaining our web applications, ensuring high performance, scalability, and security.\r\nResponsibilitiesDesign, develop, and maintain RESTful APIs using ASP.NET Core.\r\nImplement authentication and authorization mechanisms using JWT, OAuth, or IdentityServer.\r\nOptimize database performance using Entity Framework Core (EF Core) with SQL Server/PostgreSQL.\r\nWrite efficient and secure backend logic, ensuring scalability and maintainability.\r\nIntegrate third-party services and APIs.\r\nFrontend Development (React.js)\r\nDevelop and maintain user-friendly React.js applications.\r\nImplement state management using Redux, Zustand, or React Query.\r\nEnsure responsive UI/UX with CSS-in-JS, Tailwind, or Material UI.\r\nGeneral\r\nCollaborate with product managers, designers, and other developers to define requirements and deliver high-quality software.\r\nPerform code reviews and provide mentorship to junior developers.\r\nEnsure best practices in coding, security, and DevOps.\r\nWrite unit and integration tests using xUnit, Jest, or Cypress.\r\nWork with CI/CD pipelines (GitHub Actions, Azure DevOps, or Jenkins) for automated deployments.\r\nQualifications10+ years of experience in full-stack web development.\r\nStrong knowledge of C# and ASP.NET Core.\r\nExperience with SQL Server, PostgreSQL, or NoSQL databases.\r\nFamiliarity with microservices architecture and Docker/Kubernetes.\r\nHands-on experience with Azure.\r\nStrong understanding of SOLID principles and clean architecture.\r\nExperience with unit testing and test-driven development (TDD).\r\nProficiency with Git and Agile development methodologies.\r\nPreferred: knowledge of Domain-Driven Design (DDD).\r\nWe are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.\r\nExplore more rolesSee every open position across engineering, sales, customer success and operations.#J-18808-Ljbffr","company":"Ms Shift","rawCompany":"ms shift","city":"New York","state":"NY","isRemote":false,"isActive":false,"createdAt":"2026-11-04T03:16:37.915Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"},{"code":"15-1251.00","title":"Computer Programmers","slug":"computer-programmers"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Senior Software Developer – .NET Core & React.js","description":"Senior Software Developer – .NET Core & React.jsWe are looking for a Senior Software Developer with expertise in ASP.NET Core and React.js to join our dynamic team. The ideal candidate will have strong backend and frontend development skills, experience designing scalable applications, and a deep understanding of modern web technologies. You will play a key role in building and maintaining our web applications, ensuring high performance, scalability, and security.\r\nResponsibilitiesDesign, develop, and maintain RESTful APIs using ASP.NET Core.\r\nImplement authentication and authorization mechanisms using JWT, OAuth, or IdentityServer.\r\nOptimize database performance using Entity Framework Core (EF Core) with SQL Server/PostgreSQL.\r\nWrite efficient and secure backend logic, ensuring scalability and maintainability.\r\nIntegrate third-party services and APIs.\r\nFrontend Development (React.js)\r\nDevelop and maintain user-friendly React.js applications.\r\nImplement state management using Redux, Zustand, or React Query.\r\nEnsure responsive UI/UX with CSS-in-JS, Tailwind, or Material UI.\r\nGeneral\r\nCollaborate with product managers, designers, and other developers to define requirements and deliver high-quality software.\r\nPerform code reviews and provide mentorship to junior developers.\r\nEnsure best practices in coding, security, and DevOps.\r\nWrite unit and integration tests using xUnit, Jest, or Cypress.\r\nWork with CI/CD pipelines (GitHub Actions, Azure DevOps, or Jenkins) for automated deployments.\r\nQualifications10+ years of experience in full-stack web development.\r\nStrong knowledge of C# and ASP.NET Core.\r\nExperience with SQL Server, PostgreSQL, or NoSQL databases.\r\nFamiliarity with microservices architecture and Docker/Kubernetes.\r\nHands-on experience with Azure.\r\nStrong understanding of SOLID principles and clean architecture.\r\nExperience with unit testing and test-driven development (TDD).\r\nProficiency with Git and Agile development methodologies.\r\nPreferred: knowledge of Domain-Driven Design (DDD).\r\nWe are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, color, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.\r\nExplore more rolesSee every open position across engineering, sales, customer success and operations.#J-18808-Ljbffr","datePosted":"2026-11-04T03:16:37.915Z","dateModified":"2026-11-04T03:16:37.915Z","hiringOrganization":{"@type":"Organization","name":"Ms Shift","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"New York","addressRegion":"NY","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"cf5b952025c803b849f05293"},"url":"https://jobsearcher.com/jobs/cf5b952025c803b849f05293"}}