Ramsell Corporation - Full Stack Developer

Full Stack Developer is needed in Concord, United States.

Client: Ramsell Corporation

Location: Concord, CA

Contract: Temporary, Contract

Job Description

Ramsell Corporation is seeking a highly skilled and experienced Senior Full Stack Developer with hands-on experience in modern open source technologies and the Microsoft .NET ecosystem. The candidate must be proficient in building production systems using Node.js and React.js, as well as .NET 8 / ASP.NET Core. This role is for a dual-stack engineer capable of designing, developing, and maintaining scalable web applications and APIs across both technology stacks while demonstrating strong problem-solving abilities in an agile environment.

Core Responsibilities

• Design, develop, and maintain robust, scalable web applications and services using .NET 8 / ASP.NET Core (C#), Node.js, and React.js.
• Build, maintain, and optimize RESTful and minimal APIs using .NET 8 and Node.js.
• Architect full-stack solutions that balance performance, scalability, security, and maintainability.
• Develop front-end applications using React.js that integrate with back-end services built in .NET and Node.js.
• Design and implement data access layers using Entity Framework Core and SQL/NoSQL approaches.
• Work with PostgreSQL, SQL-based databases, and MongoDB.
• Develop cloud-ready, containerized applications using Docker and CI/CD pipelines.
• Collaborate with cross-functional teams to deliver high-quality solutions.
• Integrate AI and machine learning tools to enhance application capabilities.
• Write clean, maintainable, testable, and well-documented code following SOLID principles.
• Conduct code reviews, mentor junior developers, and contribute to technical standards.
• Optimize application performance and ensure security through best practices.
• Participate in sprint planning and agile ceremonies.

Required Skills

• Strong, recent hands-on experience with .NET 8 (or later) and ASP.NET Core.
• Hands-on experience with Node.js and React.js in a production environment.
• Proficiency in C#, object-oriented programming, and design patterns.
• Proficiency in JavaScript, TypeScript, HTML5, CSS3, and modern front-end practices.
• Experience developing and consuming RESTful APIs in both ecosystems.
• Strong experience with relational (PostgreSQL, SQL Server) and NoSQL databases (MongoDB).
• Experience with scalable application architectures (monoliths, microservices, or hybrid).
• Hands-on experience with Entity Framework Core and performance optimization.
• Experience with authentication and authorization in web applications.
• Proficiency with Git and CI/CD pipelines.
• Experience in agile environments using tools like Jira or Trello.
• Experience containerizing applications using Docker.
• Strong understanding of application security and performance tuning.
• Familiarity with AI or machine learning tool integration.

Education and Experience

• Bachelor’s degree in Computer Science, Information Technology, or a related field preferred.
• 8+ years of professional experience in full stack software development.
• Proven experience delivering both .NET-based and Node.js/React-based applications in production environments.
• Experience successfully delivering complex, scalable, enterprise-grade systems.
• Experience working in cross-functional teams and mentoring junior developers.
• Strong background in architectural design and system modernization.

Work Environment

• This is a temporary contractor position and will be working remotely.
• This role may require occasional evening or weekend work to address critical IT issues or complete projects.