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Umesh Kumar Yadav

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Umesh Kumar Yadav

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Oct 10, 2025

Interviewer: What Happens If the Database’s Auto-Increment ID Runs Out?

When I saw this question, it reminded me of playing World of Warcraft years ago. The 25H difficulty Brainless Roar boss had over 2.1…

Interviewer: What Happens If the Database’s Auto-Increment ID Runs Out?

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JavaScript in Plain English

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Umesh Kumar Yadav

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Oct 26, 2025

I Can’t Tell the Difference Between Java Generic Symbols: T, E, K, V, ?

Today I want to talk to you about those dazzling symbols in Java generics — T, E, K, V, and ?.

I Can’t Tell the Difference Between Java Generic Symbols: T, E, K, V, ?

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Umesh Kumar Yadav

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Aug 16, 2025

The Interviewer Asked How I’d Delete 10 Million Records. I Almost Said “DELETE FROM…”

Today, I want to talk about a classic MySQL interview question that I personally faced, one that seems simple on the surface but is packed…

The Interviewer Asked How I’d Delete 10 Million Records. I Almost Said “DELETE FROM…”

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JavaScript in Plain English

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Umesh Kumar Yadav

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Aug 10, 2025

Mastering Spring Boot: 49 Essential Utility Classes You Should Know

For non-members, please read for free here.

Mastering Spring Boot: 49 Essential Utility Classes You Should Know

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Umesh Kumar Yadav

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Jun 21, 2025

The Spring Pattern That Impressed My Manager (and Dumps if-else)

Tired of endless if-else or switch blocks for choosing implementations? Discover how the Service Locator Pattern, powered by Spring's…

The Spring Pattern That Impressed My Manager (and Dumps if-else)

Umesh Kumar Yadav

·

18h ago

Is Spring Boot 4 delivering explosive performance?

Spring Boot 4.1 + JDK 25 vs. Spring Boot 3.3 + JDK 21: A Deep Dive into Performance, Virtual Threads, AOT Compilation, and Migration…

Is Spring Boot 4 delivering explosive performance?

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Level Up Coding

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Umesh Kumar Yadav

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19h ago

The Java Service Worked for 3 Days… I spent 72 hours battling a 10MB Java OOM.

A real-world Java production incident that taught me why small coding mistakes can become massive memory leaks.

The Java Service Worked for 3 Days… I spent 72 hours battling a 10MB Java OOM.

Umesh Kumar Yadav

·

19h ago

How to Log Out a User From All Devices? Designing Session Invalidation in Java and Spring Boot

Imagine you are building an application like Netflix, Amazon, or Google.

How to Log Out a User From All Devices? Designing Session Invalidation in Java and Spring Boot

Umesh Kumar Yadav

·

2d ago

How to Design a Ride-Hailing System Like Uber : A Complete System Design Guide

An end-to-end system design covering microservices, real-time driver tracking, geospatial indexing, order dispatching, Redis, message…

How to Design a Ride-Hailing System Like Uber : A Complete System Design Guide

Umesh Kumar Yadav

·

2d ago

Why are more and more people using AI Gateway?

AI development is evolving rapidly.

Why are more and more people using AI Gateway?

Umesh Kumar Yadav

Umesh Kumar Yadavhe

Seasoned software developer with 12+ years of experience, specializing in AI, DL/ML Engineering, Java, Spring Boot, Kafka, Redis, and system architecture.

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