A “FullStack Guru” typically refers to an individual who is highly skilled and knowledgeable in both front-end and back-end web development. This term indicates expertise in the entire web development stack, from user interface design to server-side programming. Here are some key characteristics and skills associated with a FullStack Guru:

1. Full-Stack Development Skills:
   1. Proficiency in front-end technologies like HTML, CSS, JavaScript, and front-end frameworks (e.g., React, Angular, Vue.js).
   2. Strong grasp of back-end technologies, including server-side programming languages (e.g., Node.js, Python, Ruby, PHP, Java) and web frameworks (e.g., Express.js, Django, Ruby on Rails).
   3. Knowledge of databases and data modeling, with expertise in both SQL and NoSQL databases.
   4. Experience in developing RESTful APIs and integrating third-party services.
2. Web Architecture and Design:
   1. Understanding of web architecture principles, including the Model-View-Controller (MVC) and Microservices architecture.
   2. Ability to design and create user-friendly, responsive web interfaces and user experiences (UI/UX).
3. Problem-Solving and Debugging:
   1. Strong problem-solving skills and the ability to troubleshoot issues in both front-end and back-end code.
   2. Proficiency in using debugging tools and methodologies to identify and fix bugs.
4. Version Control and Collaboration:
   1. Familiarity with version control systems like Git and collaboration platforms like GitHub for team-based development.
5. Security and Best Practices:
   1. Knowledge of web security best practices to protect applications from common vulnerabilities.
   2. Adherence to coding standards, code reviews, and best practices for clean, maintainable code.
6. Development Environments and Tools:
   1. Comfort working with integrated development environments (IDEs) or code editors and build tools.
   2. Use of task runners, bundlers, and package managers like Webpack, Gulp, and npm.
7. Testing and Quality Assurance:
   1. Proficiency in testing methodologies, including unit testing and integration testing.
   2. Ensuring code quality through code reviews and testing suites.
8. Deployment and DevOps:
   1. Experience in deploying web applications to production servers and managing hosting environments.
   2. Knowledge of DevOps practices for continuous integration and continuous deployment (CI/CD).
9. Continuous Learning:
   1. A commitment to staying updated with the latest trends and technologies in web development.
10. Communication and Collaboration:
    1. Effective communication skills and the ability to collaborate with designers, back-end developers, and other team members.

A FullStack Guru is a well-rounded developer who can work on all aspects of web development, from creating user interfaces to developing server logic and managing databases. They play a critical role in building and maintaining robust and functional web applications.