anuj kumar

Technical Solutions Architect and Principal Software Engineer with 19+ years of experience in Java, AWS, microservices, and distributed systems. Passionate about scalable architecture, cloud-native en

Joined on Oct 9, 2026

anuj kumar

Oct 9

DDD, N-Layer and Microservices are not competing architectures.

#architecture

1 min read

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anuj kumar

Oct 9

🔐 Encryption vs Digital Signatures: Understanding the Difference

1 min read

anuj kumar

Oct 9

Auth 2.0 + PKCE Explained: Understanding the Complete Authentication Flow

#api #authentication #security #webdev

1 min read

anuj kumar

Oct 9

OAuth 2.0 + OIDC + PKCE Explained: From Login to API Access 🔐

#oauth #security #architecture

1 min read

anuj kumar

Oct 9

What Actually Happens When You Index a Document in Elasticsearch?

1 min read

anuj kumar

Oct 9

What Actually Happens When You Search in Elasticsearch?

1 min read

anuj kumar

Oct 9

Kafka vs NATS vs Kinesis: The Streaming Decision Map Engineers Wish They Had Before Production.

#kafka #architecture

1 min read

anuj kumar

Oct 9

🚀 Zero-Downtime Database Schema Migration: How to Evolve Without Breaking Production

#architecture #backend #database #devops

1 min read

anuj kumar

Oct 9

The Outbox Pattern isn't really about messaging. It's about eliminating an impossible atomicity assumption

#architecture #backend #database #distributedsystems

1 min read

anuj kumar

Oct 9

CAP Theorem finally clicked for me when I stopped thinking “pick 2 out of 3.”

1 min read

anuj kumar

Oct 9

Retries + Backoff + Jitter: How a Small Failure Becomes a Retry Storm.

#architecture

1 min read

anuj kumar

Oct 9

🚀Stop letting your monitoring agents slow down your production traffic!

#java #monitoring #performance #springboot

1 min read

anuj kumar

Oct 9

A resilient system isn't one that accepts every request.

#architecture #backend #sre #systemdesign

1 min read

anuj kumar

Oct 9

AWS Kinesis Stream: Adding another stream consumer sounds harmless until several critical applications share the same read capacity.

#aws #kinesis #architecture

1 min read

anuj kumar

Oct 9

⚡A Circuit Breaker isn’t really about handling errors. It’s about stopping one unhealthy dependency from taking your entire system down.

#architecture #java #microservices #springboot

1 min read

anuj kumar

Oct 9

PostgreSQL Logical Replication: Moving Live Data Without Freezing Writes

#postgres #architecture

1 min read

anuj kumar

Oct 9

If your AI agent is replacing a perfectly good ‘Freeze Card’ button, you probably don’t need an AI agent.

#agents #ai #llm

1 min read

anuj kumar

Oct 9

One customer floods a shared queue. Must everyone else wait?

#sqs #aws #architecture

1 min read

anuj kumar

Oct 9

AWS Lambda Under Load: Where Events Wait, Why Requests Throttle, and What You Pay

#aws #architecture

1 min read

anuj kumar

Oct 9

Your PostgreSQL Index Probably Doesn't Need Every Row

#database #performance #sql

1 min read

anuj kumar

Oct 9

Java 25 Memory Model: The Concurrency Rules Every Java Engineer Thinks They Know - Until Production Proves Otherwise

#backend #java #programming #softwareengineering

1 min read

anuj kumar

Oct 9

Java String Pool: The Memory Optimization That Can Quietly Become an OOM Trap

#java

1 min read

anuj kumar

Oct 9

Two Users. One Row. Who Wins?

#architecture

1 min read

anuj kumar

Oct 9

Virtual threads are not dangerous; unbounded concurrency against a bounded dependency is.

#architecture #backend #java #performance

1 min read

anuj kumar

Oct 9

The Payment Succeeded. The Response Never Arrived.

#architecture

1 min read

anuj kumar

Oct 9

🚀 AI Can Write Code in Seconds. But Can It Architect a System That Survives Production?

#architecture #productivity #ai

1 min read

DEV Community

anuj kumar

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Writing Debut

DDD, N-Layer and Microservices are not competing architectures.

Want to connect with anuj kumar?

🔐 Encryption vs Digital Signatures: Understanding the Difference

Auth 2.0 + PKCE Explained: Understanding the Complete Authentication Flow

OAuth 2.0 + OIDC + PKCE Explained: From Login to API Access 🔐

What Actually Happens When You Index a Document in Elasticsearch?

What Actually Happens When You Search in Elasticsearch?

Kafka vs NATS vs Kinesis: The Streaming Decision Map Engineers Wish They Had Before Production.

🚀 Zero-Downtime Database Schema Migration: How to Evolve Without Breaking Production

The Outbox Pattern isn't really about messaging. It's about eliminating an impossible atomicity assumption

CAP Theorem finally clicked for me when I stopped thinking “pick 2 out of 3.”

Retries + Backoff + Jitter: How a Small Failure Becomes a Retry Storm.

🚀Stop letting your monitoring agents slow down your production traffic!

A resilient system isn't one that accepts every request.

AWS Kinesis Stream: Adding another stream consumer sounds harmless until several critical applications share the same read capacity.

⚡A Circuit Breaker isn’t really about handling errors. It’s about stopping one unhealthy dependency from taking your entire system down.

PostgreSQL Logical Replication: Moving Live Data Without Freezing Writes

If your AI agent is replacing a perfectly good ‘Freeze Card’ button, you probably don’t need an AI agent.

One customer floods a shared queue. Must everyone else wait?

AWS Lambda Under Load: Where Events Wait, Why Requests Throttle, and What You Pay

Your PostgreSQL Index Probably Doesn't Need Every Row

Java 25 Memory Model: The Concurrency Rules Every Java Engineer Thinks They Know - Until Production Proves Otherwise

Java String Pool: The Memory Optimization That Can Quietly Become an OOM Trap

Two Users. One Row. Who Wins?

Virtual threads are not dangerous; unbounded concurrency against a bounded dependency is.

The Payment Succeeded. The Response Never Arrived.

🚀 AI Can Write Code in Seconds. But Can It Architect a System That Survives Production?