Become a Better Infrastructure Engineer, Every Week

I’ve worked on infrastructure at PhonePe, KayHosting, and now at a US startup. Every week, I share practical engineering lessons and curate the best articles, tutorials, news, and github projects to help you improve and stay current.

Cracking SRE

Built from my experience working as SRE at a US startup, PhonePe, KayHosting, this guide covers the concepts, questions, and practical thinking you actually need to crack SRE interviews.

Yoshik Karnawat

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May 1, 2026

Weekly Digest

Digest

Aug 22, 2026

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1 min read

#32 Uptime Sync: PgBouncer, Kubernetes Health Checks, and the Production Mistakes That Take Services Down

Database connections, broken probes, cloud-cost discipline, and practical DevOps lessons for engineers running real systems

Yoshik Karnawat

Digest

Aug 15, 2026

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2 min read

#31 Uptime Sync: P99 Breakthroughs, AI Agent Blind Spots, and Infrastructure at Massive Scale

From a one-line Python fix to GPU networking, secure CI pipelines, and the observability gaps hiding inside AI agents

Yoshik Karnawat

Digest

Aug 8, 2026

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2 min read

#30 Uptime Sync: AI Agents in Production, Telemetry Blind Spots, and the Scale Problems Nobody Sees

From OpenAI’s sandbox escape to Prometheus memory waste and million-event telemetry pipelines

Yoshik Karnawat

Digest

Aug 1, 2026

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2 min read

#29 Uptime Sync: Region Switches, Kafka Performance, and the Kubernetes Failures

Game-day traffic recovery, 10 billion webhooks a month, AI cost controls, and the production issues that appear only when systems are under pressure

Yoshik Karnawat

Digest

Jul 26, 2026

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2 min read

#28 Uptime Sync: The Security Gaps, Database Regressions, and Failovers That Hurt in Production

From compromised release branches and silent PostgreSQL defaults to chaos-tested Kubernetes operators and high-availability systems that still brown out

Yoshik Karnawat

Digest

Jul 19, 2026

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2 min read

#27 Uptime Sync: DNS Failures, Million-Sandbox Scale, and the Kubernetes Risks

Production failures, infrastructure at extreme scale, and the security gaps that can turn a small misconfiguration into a cluster takeover

Yoshik Karnawat

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Deep Dives

Career

Aug 17, 2026

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5 min read

Which DevOps Certs Are Worth It in 2026

Certs Can Get You Interviews, but Skills Get You Hired

Yoshik Karnawat

Networking

+1

Aug 10, 2026

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8 min read

AWS Networking

How Traffic Actually Moves From a VPC to NAT Gateway and PrivateLink

Yoshik Karnawat

Career

Aug 4, 2026

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4 min read

Why I Left a Large Company for a Startup

PhonePe taught me how to operate critical infrastructure at scale. I left because I needed to learn how to build more of it myself.

Yoshik Karnawat

Linux

Jul 29, 2026

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9 min read

Linux Processes That Do Nothing, Explained

States, Threads, I/O Waits, and /proc Deep Dive

Yoshik Karnawat

Networking

Jul 22, 2026

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9 min read

How TLS Works - Deep Dive

Inside the TLS Handshake: How Certificates, Key Exchange, and Latency Shape Your HTTPS Performance

Yoshik Karnawat

Cloud

Jul 13, 2026

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10 min read

AWS IAM Simply Explained

IAM Deep Dive. Bookmark this.

Yoshik Karnawat

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