Engineering Blog & Tech Deep Dives

Kashinath Chavan • Frontend & Next.js • Aug 20

React 19 Deep Dive: Actions, useOptimistic, useFormStatus & Concurrent Rendering

React 19 is the biggest release since React 16 hooks. Actions replace useEffect form submissions, useOptimistic enables instant UI feedback, and React Compiler eliminates manual memoization. Complete guide with working code examples.

⏱️ 5 min read 👁️ 3651 views 👏 445 claps

React 19 Deep Dive: Actions, useOptimistic, useFormStatus & Concurrent Rendering

Kashinath Chavan • Data Structures & Algorithms • Aug 19

Java Multi-Threading & Concurrency Deep Dive: Thread Lifecycle & Synchronization

Master Java concurrency: Thread states, Runnable vs Callable, synchronized blocks, volatile keywords, deadlock prevention, and ExecutorService thread pools.

⏱️ 2 min read 👁️ 299 views 👏 66 claps

Java Multi-Threading & Concurrency Deep Dive: Thread Lifecycle & Synchronization

Kashinath Chavan • Database & SQL • Aug 19

PostgreSQL Advanced Patterns: JSONB Queries, Partial Indexes & Full-Text Search

PostgreSQL JSONB with GIN indexes delivers MongoDB-level document flexibility inside a relational database. Learn partial indexes, expression indexes, covering indexes, and full-text search with tsvector — the patterns used by Shopify and GitLab at scale.

⏱️ 4 min read 👁️ 2892 views 👏 362 claps

PostgreSQL Advanced Patterns: JSONB Queries, Partial Indexes & Full-Text Search

Kashinath Chavan • Interview Prep & Database • Aug 18

SQL for E-commerce Inventory: Flash Sales, Low Stock Alerts, & Stock Reconciliation

Running a flash sale requires real-time inventory tracking. Learn how to prevent overselling, reconcile stock across warehouses, and alert on low inventory with production-ready SQL queries.

⏱️ 3 min read 👁️ 6 views 👏 0 claps

SQL for E-commerce Inventory: Flash Sales, Low Stock Alerts, & Stock Reconciliation

Kashinath Chavan • Data Structures & Algorithms • Aug 18

Java Collections Framework Mastery: ArrayList, HashMap & Queue Implementations

Under the hood of the Java Collections Framework: HashMap collision handling with red-black trees, ArrayList dynamic capacity doubling, and ConcurrentHashMap locks.

⏱️ 2 min read 👁️ 335 views 👏 74 claps

Java Collections Framework Mastery: ArrayList, HashMap & Queue Implementations

Kashinath Chavan • Developer Tooling & Compilers • Aug 18

Kubernetes for Developers: Pods, Services, Deployments and Helm Charts Explained

Kubernetes does not have to be intimidating. Learn the core objects — Pods, Deployments, Services, Ingress, ConfigMaps, Secrets — with real YAML manifests for a Django + Next.js app, then package it all with a Helm chart.

⏱️ 4 min read 👁️ 3124 views 👏 408 claps

Kubernetes for Developers: Pods, Services, Deployments and Helm Charts Explained

Kashinath Chavan • Interview Prep & Database • Aug 17

Core Java & JVM Memory Architecture: Static, Final, Heap & Stack Models

Understand JVM internal runtime data areas: ClassLoader subsystem, Heap memory generations, Stack frames, Method Area, and exact Static vs Final behavior.

⏱️ 1 min read 👁️ 372 views 👏 82 claps

Core Java & JVM Memory Architecture: Static, Final, Heap & Stack Models

Kashinath Chavan • Interview Prep & Database • Aug 17

LeetCode 75: Two Pointers, Sliding Window & Binary Search with Pattern Recognition

Stop memorising solutions. Learn the 5 core algorithmic patterns that solve 80% of LeetCode problems. Two Pointers, Sliding Window, Binary Search, and more with 15 solved problems, Big-O analysis, and interview strategy.

⏱️ 5 min read 👁️ 4781 views 👏 621 claps

Tech Blog & Engineering Masterclasses