Senior Software Developer – .NET Core & React.js

MS Shift, Inc.; New York (NY); On-site; USD 120,000 - 180,000; Full time

Job summary

MS Shift, Inc. is seeking a Senior Software Developer specializing in ASP.NET Core and React.js to build scalable web applications. You will design APIs, implement security, and collaborate across teams while maintaining high performance, reliability, and quality code.

Experience with microservices, cloud services, and modern DevOps practices is essential to deliver robust software in a fast-paced environment.

Qualifications

• 10+ years of full-stack web development experience.
• Strong knowledge of C# and ASP.NET Core.
• Experience with SQL Server, PostgreSQL, or NoSQL databases.
• Familiarity with microservices architecture and container orchestration.
• Hands-on experience with Azure cloud services.
• Strong understanding of SOLID principles and clean architecture.
• Experience with unit testing and test-driven development (TDD).
• Proficiency with Git and Agile methodologies.
• Preferred: knowledge of Domain-Driven Design (DDD).

Responsibilities

• Design, develop, and maintain RESTful APIs using ASP.NET Core.
• Implement authentication and authorization mechanisms using JWT, OAuth, or IdentityServer.
• Optimize database performance using EF Core with SQL Server/PostgreSQL.
• Write efficient and secure backend logic, ensuring scalability and maintainability.
• Collaborate with product managers, designers, and other developers to define requirements and deliver high-quality software.
• Perform code reviews and provide mentorship to junior developers.
• Ensure best practices in coding, security, and DevOps.
• Write unit and integration tests using xUnit, Jest, or Cypress.
• Work with CI/CD pipelines (GitHub Actions, Azure DevOps, or Jenkins) for automated deployments.

Skills

C#

ASP.NET Core

React.js

Microservices

Docker

Kubernetes

Azure

Git & Agile

DDD

Tools

Docker

Kubernetes

Azure

Job description

Senior Software Developer – .NET Core & React.js

We 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.

Responsibilities

• Design, develop, and maintain RESTful APIs using ASP.NET Core.
• Implement authentication and authorization mechanisms using JWT, OAuth, or IdentityServer.
• Optimize database performance using Entity Framework Core (EF Core) with SQL Server/PostgreSQL.
• Write efficient and secure backend logic, ensuring scalability and maintainability.
• Integrate third-party services and APIs.
• Frontend Development (React.js)
• Develop and maintain user-friendly React.js applications.
• Implement state management using Redux, Zustand, or React Query.
• Ensure responsive UI/UX with CSS-in-JS, Tailwind, or Material UI.
• General
• Collaborate with product managers, designers, and other developers to define requirements and deliver high-quality software.
• Perform code reviews and provide mentorship to junior developers.
• Ensure best practices in coding, security, and DevOps.
• Write unit and integration tests using xUnit, Jest, or Cypress.
• Work with CI/CD pipelines (GitHub Actions, Azure DevOps, or Jenkins) for automated deployments.

Qualifications

• 10+ years of experience in full-stack web development.
• Strong knowledge of C# and ASP.NET Core.
• Experience with SQL Server, PostgreSQL, or NoSQL databases.
• Familiarity with microservices architecture and Docker/Kubernetes.
• Hands-on experience with Azure.
• Strong understanding of SOLID principles and clean architecture.
• Experience with unit testing and test-driven development (TDD).
• Proficiency with Git and Agile development methodologies.
• Preferred: knowledge of Domain-Driven Design (DDD).

We 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.

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