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HARSHAD's Dev Diary

Java, Spring Boot, AWS, Microservices

How to Tune JVM for Low-Latency Applications

Modern applications—from real-time trading systems to high-frequency APIs—demand consistent low latency. While Java provides excellent performance, improper JVM tuning can introduce GC pauses, memory bottlenecks, and unpredictable latency spikes. This guide dives deep into practical JVM tuning strategies to help Read more

By HS, 12 hoursApril 18, 2026 ago
Java Microservices vs Go Microservices: When to Choose What?
Java, Spring Boot, AWS, Microservices

Java Microservices vs Go Microservices: When to Choose What?

Microservices have become the backbone of modern distributed systems. As organizations decompose monolithic applications into independently deployable services, the choice of programming language plays a critical role in performance, scalability, developer productivity, and long-term maintainability. Two languages frequently compared in Read more

By HS, 2 weeksApril 4, 2026 ago
Building Real-Time Applications in Java: Architecture & Framework Choices
Java, Spring Boot, AWS, Microservices

Building Real-Time Applications in Java: Architecture & Framework Choices

Real-time applications have moved far beyond chat systems and stock tickers. Today, they power financial trading platforms, collaborative tools, live dashboards, multiplayer games, IoT monitoring systems, and streaming analytics pipelines. For Java developers, building real-time systems presents a unique challenge: Read more

By HS, 3 weeksMarch 28, 2026 ago
A Deep Dive into Java’s Garbage Collection Algorithms (ZGC, Shenandoah, G1GC)
Java, Spring Boot, AWS, Microservices

A Deep Dive into Java’s Garbage Collection Algorithms (ZGC, Shenandoah, G1GC)

Memory management has always been one of Java’s strongest advantages—and one of its most misunderstood components. While Java developers rarely manage memory manually, the choice and tuning of the Garbage Collector (GC) can dramatically impact application latency, throughput, and scalability. Read more

By HS, 4 weeksMarch 21, 2026 ago
Mastering Asynchronous Programming in Java with CompletableFuture
Java, Concurrency, Asynchronous Programming, Backend Development

Mastering Asynchronous Programming in Java with CompletableFuture

Modern applications are expected to be fast, responsive, and capable of handling multiple operations concurrently. In Java, traditional multithreading using Thread, Runnable, and ExecutorService often leads to verbose code, complex error handling, and difficult-to-maintain logic. This is where CompletableFuture, introduced Read more

By HS, 1 monthMarch 14, 2026 ago
Advanced Java Collections: Internal Implementations and Performance Tricks
Java, JVM Internals, Performance Engineering, Backend Development

Advanced Java Collections: Internal Implementations and Performance Tricks

Introduction Java Collections are among the most frequently used APIs in enterprise applications. From request handling and caching to data processing and concurrency, collections sit at the heart of nearly every Java system. Yet, many performance issues in production systems Read more

By HS, 1 monthMarch 7, 2026 ago
How to Build High-Performance APIs in Java Using gRPC
Java, Spring Boot, AWS, Microservices

How to Build High-Performance APIs in Java Using gRPC

Introduction As modern systems scale, traditional REST-based APIs often begin to show limitations—especially in latency-sensitive and high-throughput environments. JSON serialization overhead, verbose payloads, and HTTP/1.1 constraints can become bottlenecks in distributed systems. This is where gRPC stands out. gRPC is Read more

By HS, 2 monthsFebruary 28, 2026 ago
JVM Internals Explained: Class Loaders, Bytecode, and Execution Engine
Java, Spring Boot, AWS, Microservices

JVM Internals Explained: Class Loaders, Bytecode, and Execution Engine

Introduction One of Java’s greatest strengths is its promise of “write once, run anywhere.” Behind this promise lies the Java Virtual Machine (JVM)—a sophisticated runtime that abstracts hardware, manages memory, executes bytecode, and optimizes performance dynamically. Many Java developers use Read more

By HS, 2 monthsFebruary 21, 2026 ago
Understanding Virtual Threads in Java (Project Loom) for High Concurrency Systems
Java, Spring Boot, AWS, Microservices

Understanding Virtual Threads in Java (Project Loom) for High Concurrency Systems

Introduction High concurrency has always been one of Java’s strongest use cases—and one of its toughest challenges. For years, Java developers have relied on thread pools, asynchronous frameworks, and reactive programming models to scale systems efficiently. While these approaches work, Read more

By HS, 2 monthsFebruary 14, 2026 ago
Platform Engineering Essentials for Java-Centric Cloud Teams
Java, Spring Boot, AWS, Microservices

Platform Engineering Essentials for Java-Centric Cloud Teams

Introduction As cloud adoption matures, Java teams are facing a new challenge. While infrastructure is more powerful and flexible than ever, developers are often slowed down by fragmented tooling, inconsistent environments, and operational complexity. Simply “using the cloud” is no Read more

By HS, 2 monthsFebruary 7, 2026 ago

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