Last Updated on June 14, 2025

Welcome to the Tutorials section — a curated collection of hands-on, in-depth guides based on my 12+ years of experience in software development, microservices architecture, and full-stack engineering. Whether you’re a beginner aiming to strengthen your foundations or a working professional looking to scale your system design skills, these tutorials are crafted to help you build real-world expertise.

🔧 Categories Covered

1. System Design

Design scalable, reliable systems used in real-world applications.

  • Fundamentals of System Design
  • High-Level & Low-Level Design (HLD/LLD)
  • Designing a Movie Ticket Booking System
  • Scalable Architecture Patterns
  • Load Balancing, Caching, Database Sharding

🔗 Explore System Design Tutorials »

2. DSA for Working Professionals

DSA Programme – (Basics, Intermediate & Advanced) (with Java Examples)

  • Foundations of Algorithms and Data Structures: A Detailed Guide
  • Mastering Advanced Data Structures & Algorithms: A Deep Dive into Greedy, Heaps, and Graph Algorithms
  • Advanced DSA Concepts: From Graphs to Dynamic Programming and Beyond

🔗 Explore DSA Tutorials for Working Professional »

3. React.js

Build interactive, responsive front-end applications using modern React practices.

  • React Basics to Advanced
  • Component Architecture
  • State Management (Hooks, Context, Redux)
  • REST API Integration
  • Real-world UI Projects

🔗 Explore React.js Tutorials »

4. Java & Spring Boot

Master enterprise-grade backend development with Java and Spring Boot.

  • RESTful API Development
  • Spring Boot Microservices
  • Spring Security & OAuth2
  • JPA, Hibernate, and PostgreSQL
  • Dockerizing Spring Apps

🔗 Explore Java & Spring Boot Tutorials »

5. Microservices Architecture

Learn how to break monoliths and build cloud-native applications.

  • Microservices Patterns & Best Practices
  • API Gateway & Service Discovery
  • Circuit Breakers, Config Server
  • DevOps Integration
  • Real-world Migration Case Study (TPI System)

🔗 Explore Microservices Tutorials »

6. DevOps & CI/CD

Automate and manage your deployments efficiently.

  • GitHub Actions, Jenkins Pipelines
  • Docker & Kubernetes Basics
  • CI/CD for Java Projects
  • Infrastructure as Code (IaC)

🔗 Explore DevOps Tutorials »

📌 Why These Tutorials?

  • ✅ Real-world Use Cases: Derived from government and enterprise projects I’ve led or contributed to.
  • ✅ Step-by-Step Learning: Each topic builds upon the previous with diagrams, code, and practical tasks.
  • ✅ Ready-to-Use Code: GitHub repositories included wherever applicable.
  • ✅ Architect Perspective: Focused not just on how, but also why.

🚀 Start Learning

Whether you’re upskilling for your next role, preparing for interviews, or refining your architecture skills — these tutorials will guide your journey.

✍️ About the Author

Pranu Kumar
Senior Software Developer @CIPL (CRIS Project)
☁️ Full-Stack Java Specialist | Architect in Progress
🛡️ Secure e-Governance Solutions | Mentor | Govt. IT & SCM Expert
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