Srimanta Sahu

👋 Hi, I'm Srimanta Sahu — a Senior Software Engineer and the creator of OopsCoder.com. With over 12 years of experience in Java full-stack development, I specialize in designing and building scalable, high-performance backend systems and distributed architectures, tackling real-world system design challenges with practical, efficient solutions.At OopsCoder, I publish deep-dive tutorials, hands-on code examples, and architectural insights across topics like Java, Spring Framework, System Design, Data Structures & Algorithms (DSA), Concurrency, and JVM performance tuning—content crafted for developers and engineering teams who want to go beyond surface-level understanding.🔗 Connect with me on LinkedIn

System Design Deep Dive: Architecture Principles, Design Patterns & Scalability

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Designing scalable, maintainable, and high-performance systems takes more than just clean code—it requires a strong grasp of architecture, trade-offs, and real-world constraints. This System Design Deep Dive series is your structured roadmap to mastering modern system architecture. Whether you’re preparing for interviews or architecting production-grade systems, this guide walks you from foundational principles to advanced … Read more

Spring Framework in Java: The Complete Guide for Developers

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The Spring Framework is the backbone of modern Java development. From building robust web applications to creating scalable microservices, Spring empowers developers with tools that promote clean architecture, testability, and modular design. In this complete guide, we’ll walk through everything you need to know about Spring Framework in Java — starting from core concepts like … Read more

Mastering Java Concurrency: The Complete Guide With Examples

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Mastering Java concurrency is essential for building high-performance, scalable, and responsive applications. In modern development, concurrency enables Java programs to execute multiple tasks simultaneously—maximizing CPU utilization and ensuring smooth user experiences. In this complete guide, we’ll dive deep into Java concurrency, covering everything from basic thread creation to advanced synchronization techniques. You’ll learn: ✔️ How … Read more

Algorithms in Java: The Complete Guide with Examples

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Algorithms are the heart of problem-solving in programming. Whether you’re preparing for coding interviews, optimizing software performance, or working on real-world applications, understanding algorithms in Java is essential. In this guide, you’ll learn: ✔️ The most important algorithms in Java ✔️ Working principles and time complexity ✔️ Step-by-step code examples for hands-on learning ✔️ Real-world use cases By the … Read more

Data Structures in Java: The Complete Guide with Examples

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Data structures are the backbone of efficient programming. Whether you’re handling large datasets, optimizing performance, or preparing for coding interviews, understanding Java’s built-in and custom data structures is essential. In this guide, we’ll explore all significant data structures in Java, from basic arrays to advanced trees and graphs. You’ll learn: ✔️ When to use each data … Read more

System Design Deep Dive – Part 1: Foundational Principles for Scalable Systems

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Designing reliable, scalable systems goes beyond coding—it starts with strong architectural foundations. In this first part of the System Design Deep Dive series, we explore the key principles that shape robust software architecture: SOLID Principles for object-oriented maintainability ACID Compliance for transactional integrity CAP Theorem trade-offs in distributed systems Consistent Hashing for scalable partitioning Design … Read more

System Design Deep Dive – Part 2: Designing and Estimating Real-World Systems

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Designing scalable, reliable systems isn’t just about writing code or picking the right tools. It’s about making thoughtful decisions at every layer of the architecture—from the initial idea to detailed class structures. In this second part of the System Design Deep Dive series, we’ll walk through the four critical pillars of practical system design: Asking … Read more

System Design Deep Dive – Part 3: Scaling Infrastructure and Distributed Systems

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Designing systems that scale across geographies, workloads, and services is at the core of modern software architecture. In this third part of the System Design Deep Dive series, we explore the infrastructure-level strategies and distributed systems patterns that empower you to build resilient, performant, and scalable architectures. Whether you’re preparing for high-stakes interviews or scaling … Read more