Welcome to the official repository of the AhdTech Backend Internship Program! 🚀 This program is designed to equip interns with cutting-edge backend development skills using Spring Boot and modern technologies.

This internship spans 320 hours of intensive backend development training, combining theory, practical tasks, and real-world project experiences. By the end of the program, participants gain mastery in building robust, secure, and scalable web applications.

The training plan is divided into weekly modules, each focusing on critical backend development concepts:

A step-by-step guide to the comprehensive 8-week backend development training program.

• Objective: Establish a strong foundation in Java programming to prepare for backend development.
• Topics Covered:
  • Java Essentials:
    • Syntax, variables, data types, and operators.
    • Control structures: loops (for, while), conditionals (if, switch).
  • Object-Oriented Programming (OOP):
    • Classes, objects, inheritance, encapsulation, polymorphism, and abstraction.
    • Real-world examples to understand OOP principles.
  • Java Collections Framework:
    • Data structures like ArrayList, HashMap, Set, and Queue.
    • Iterators and lambda expressions.
  • Exception Handling:
    • Managing errors with try, catch, finally, and custom exceptions.
  • File I/O:
    • Reading and writing files using java.io and java.nio packages.
• Outcome: Gain fluency in Java basics and OOP, enabling you to write clean, efficient code.

• Objective: Familiarize participants with the core concepts of the Spring Framework and Spring Boot.
• Topics Covered:
  • Spring Framework Basics:
    • Dependency Injection (DI) and Inversion of Control (IoC).
    • Understanding Spring Containers, Beans, and Application Context.
  • Spring Boot Fundamentals:
    • Bootstrapping applications with Spring Boot.
    • Simplified configurations using application.properties and annotations.
  • Spring MVC:
    • Setting up web projects with Spring MVC.
    • Request mappings, controllers, and view resolvers.
  • Building Your First Spring Boot Application:
    • A hands-on project to demonstrate component integration.
• Outcome: Learn to use Spring Boot to build applications efficiently.

• Objective: Design and implement RESTful web services using Spring Boot.
• Topics Covered:
  • Understanding REST Architecture:
    • Principles: statelessness, client-server separation, resource-based interactions.
    • HTTP methods: GET, POST, PUT, DELETE, PATCH.
  • Creating APIs with Spring Boot:
    • Building controllers and defining endpoints.
    • Using @RestController, @RequestMapping, @PathVariable, and @RequestParam.
  • JSON Serialization/Deserialization:
    • Converting Java objects to JSON and vice versa with Jackson.
  • Error Handling:
    • Standardized API responses with proper error messages and status codes.
  • Postman Testing:
    • Testing endpoints with Postman collections.
• Outcome: Build and test robust RESTful APIs.

• Objective: Introduce relational database interaction using Spring Data JPA.
• Topics Covered:
  • Database Fundamentals:
    • Relational database concepts (tables, relationships, normalization).
    • Basic SQL queries: SELECT, INSERT, UPDATE, DELETE.
  • Spring Data JPA:
    • Configuring JPA and Hibernate.
    • Creating repositories for CRUD operations using JpaRepository.
  • Entity Modeling:
    • Mapping Java objects to database tables with JPA annotations (@Entity, @Table, @Column).
    • Managing relationships: @OneToOne, @OneToMany, @ManyToOne, @ManyToMany.
  • H2 Database:
    • Using H2 for quick development.
  • Advanced Queries:
    • Writing custom JPQL and native SQL queries.
• Outcome: Seamlessly connect your applications to a database for CRUD operations.

• Objective: Secure applications with authentication and authorization using Spring Security and JWT.
• Topics Covered:
  • Spring Security Basics:
    • Protecting endpoints with @PreAuthorize and role-based access.
    • Customizing security filters.
  • JWT Authentication:
    • Generating and validating JWT tokens.
    • Stateless authentication for REST APIs.
  • Password Encryption:
    • Secure passwords using BCryptPasswordEncoder.
  • Role-Based Access Control:
    • Managing user roles (e.g., ADMIN, USER) and restricting access.
• Outcome: Implement robust authentication and authorization.

• Objective: Understand microservices architecture and distributed systems.
• Topics Covered:
  • Microservices Fundamentals:
    • Breaking monoliths into smaller, independently deployable services.
  • Spring Cloud:
    • Service discovery with Eureka.
    • API Gateway with Spring Cloud Gateway.
  • Inter-Service Communication:
    • Using Feign clients and RestTemplate.
  • Resilience and Fault Tolerance:
    • Circuit breakers with Resilience4j.
  • Introduction to Docker:
    • Containerizing applications for consistent deployment.
• Outcome: Design scalable and resilient applications.

• Objective: Build a full-stack application by integrating backend APIs with a frontend.
• Topics Covered:
  • Frontend Integration:
    • Consuming REST APIs with React or Angular.
    • Displaying dynamic content.
  • Advanced Backend Features:
    • Pagination and sorting for large datasets.
    • Real-time updates with WebSockets.
  • File Handling:
    • Uploading and retrieving files via APIs.
  • Debugging:
    • Using Postman, browser dev tools, and logs for debugging.
• Outcome: Develop a complete, feature-rich full-stack application.

• Objective: Apply all knowledge gained to complete a capstone project.
• Activities:
  • Project Planning:
    • Define requirements and design architecture.
  • Implementation:
    • Develop a task management system with advanced features like audit logs and reporting.
  • Code Review and Feedback:
    • Peer reviews and final evaluation.
• Outcome: Complete a production-grade project demonstrating backend expertise.

This training plan ensures a structured and comprehensive learning journey, preparing participants for real-world backend development challenges.

1. Java Programming:
   • Mastery of OOP concepts, exception handling, and I/O operations.
2. Spring Framework:
   • Core concepts like Dependency Injection (DI) and Inversion of Control (IoC).
3. Spring Boot:
   • Simplified REST API development, Spring Data JPA for database interaction.
4. Database Management:
   • Hands-on experience with H2 (development) and PostgreSQL (production).
5. Security:
   • JWT-based authentication, role-based access control.
6. Testing:
   • Writing unit and integration tests using JUnit and Mockito.
7. Microservices:
   • Introduction to microservices architecture and inter-service communication.

• Time management and meeting deadlines.
• Debugging and troubleshooting in real-world scenarios.

1. API Development:

   • Designed and implemented robust REST APIs with CRUD capabilities.
   • Integrated advanced filtering and search functionalities.

2. Admin Features:

   • User management, including role updates and system-wide reporting.
   • Enhanced system oversight with task summaries and category-wise insights.

3. Audit Logging:

   • Recorded critical user and admin actions for accountability.

4. Production Readiness:

   • Used Dockerized PostgreSQL for scalable production deployments.
   • Applied best practices for securing and optimizing Spring Boot applications.

• Deploy the system on a cloud platform (e.g., AWS, Azure).
• Enhance features with advanced microservices.
• Implement CI/CD pipelines for automated testing and deployment.

A huge thanks to AhdTech for providing this incredible learning opportunity and to the team for their continuous support and guidance. This experience has been invaluable in my professional growth.