Yoshik Karnawat

SRE @PhonePe

Networking

How Internet Routing Recovers From Network Failures

Sep 14, 2026

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6 min read

How Internet Routing Recovers From Network Failures

BGP can move traffic to another path, but the result depends on failure detection, local policy, and whether the backup route is actually usable.

Yoshik Karnawat

Digest

#35 Uptime Sync: Cloud Availability Risks, PostgreSQL 19, and AI Agent Safety

Sep 11, 2026

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1 min read

#35 Uptime Sync: Cloud Availability Risks, PostgreSQL 19, and AI Agent Safety

The hidden failure modes in cloud software, the infrastructure changes worth tracking now, and why human judgment still matters in AI-powered engineering

Yoshik Karnawat

DevOps

DNS Changed. Some Users Still Reaching the Old Service?

Sep 8, 2026

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5 min read

DNS Changed. Some Users Still Reaching the Old Service?

The DNS record may be correct, but cached answers, internal DNS policies, or routing can still send users to the old destination.

Yoshik Karnawat

Digest

#34 Uptime Sync: AI Outages, Buildkite Lessons, and the Cloud Costs Hiding in Plain Sight

Sep 5, 2026

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1 min read

#34 Uptime Sync: AI Outages, Buildkite Lessons, and the Cloud Costs Hiding in Plain Sight

From chatbot downtime and crawler traffic to inconsistent VM performance, safer recovery workflows, and practical GitOps tools

Yoshik Karnawat

Career

18-Month SRE and Platform Engineer Roadmap

Sep 1, 2026

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5 min read

18-Month SRE and Platform Engineer Roadmap

The Practical Roadmap to SRE and Platform Engineering

Yoshik Karnawat

Digest

#33 Uptime Sync: PostgreSQL 18 Speed, AI Agent Risks, and Smarter Kubernetes Scaling

Aug 29, 2026

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1 min read

#33 Uptime Sync: PostgreSQL 18 Speed, AI Agent Risks, and Smarter Kubernetes Scaling

From UUID v7 inserts and Kubernetes FinOps to AI agents in CI/CD - cloud, database, and security lessons.

Yoshik Karnawat

DevOps

Aug 24, 2026

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6 min read

Terraform vs OpenTofu

How I'd Choose for a New Project

Yoshik Karnawat

Digest

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

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

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

Digest

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

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

Networking

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

Digest

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

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

Career

Why I Left a Large Company for a Startup

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

Digest

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

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

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

Digest

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

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

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

Digest

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

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

Cloud

Jul 13, 2026

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10 min read

AWS IAM Simply Explained

IAM Deep Dive. Bookmark this.

Yoshik Karnawat

Digest

#26 Uptime Sync: The Rewrite Trap, PostgreSQL at Scale, and the Costs That Show Up After Launch

Jul 12, 2026

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2 min read

#26 Uptime Sync: The Rewrite Trap, PostgreSQL at Scale, and the Costs That Show Up After Launch

Why working code gets replaced too early, databases become harder to operate than expected, and real infrastructure costs begin after the demo

Yoshik Karnawat

DevOps

I Don’t Chase Every New Tool Anymore. I Test, Compare, and Move On

Jul 8, 2026

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7 min read

I Don’t Chase Every New Tool Anymore. I Test, Compare, and Move On

The advice I'd give every junior DevOps and SRE engineer starting today.

Yoshik Karnawat

Digest

#25 Uptime Sync: Homelabs That Maintain Themselves, PostgreSQL Superpowers, and the AI Bill Nobody Expected

Jul 6, 2026

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2 min read

#25 Uptime Sync: Homelabs That Maintain Themselves, PostgreSQL Superpowers, and the AI Bill Nobody Expected

Self-managing infra, transaction-powered workflows, and the practical lessons hiding behind retry storms, pager fatigue, and simpler stacks

Yoshik Karnawat

DevOps

21 Lessons I Learned in My First 3 Years as an SRE

Jun 28, 2026

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3 min read

21 Lessons I Learned in My First 3 Years as an SRE

The advice I'd give every junior DevOps and SRE engineer starting today.

Yoshik Karnawat

Digest

#24 Uptime Sync: Terminal Workflows, PostgreSQL Enough, and the Tools That Still Win

Jun 26, 2026

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1 min read

#24 Uptime Sync: Terminal Workflows, PostgreSQL Enough, and the Tools That Still Win

Practical infra lessons, zero-downtime migrations, and simple systems that keep outperforming fashionable stacks

Yoshik Karnawat

Jun 22, 2026

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9 min read

Eventual Consistency

How Dynamo, Cassandra, and Cosmos DB Choose Availability Over Immediate Agreement

Yoshik Karnawat

Yoshik Karnawat

How Internet Routing Recovers From Network Failures

#35 Uptime Sync: Cloud Availability Risks, PostgreSQL 19, and AI Agent Safety

DNS Changed. Some Users Still Reaching the Old Service?

#34 Uptime Sync: AI Outages, Buildkite Lessons, and the Cloud Costs Hiding in Plain Sight

18-Month SRE and Platform Engineer Roadmap

#33 Uptime Sync: PostgreSQL 18 Speed, AI Agent Risks, and Smarter Kubernetes Scaling

Terraform vs OpenTofu

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

Which DevOps Certs Are Worth It in 2026

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

AWS Networking

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

Why I Left a Large Company for a Startup

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

Linux Processes That Do Nothing, Explained

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

How TLS Works - Deep Dive

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

AWS IAM Simply Explained

#26 Uptime Sync: The Rewrite Trap, PostgreSQL at Scale, and the Costs That Show Up After Launch

I Don’t Chase Every New Tool Anymore. I Test, Compare, and Move On

#25 Uptime Sync: Homelabs That Maintain Themselves, PostgreSQL Superpowers, and the AI Bill Nobody Expected

21 Lessons I Learned in My First 3 Years as an SRE

#24 Uptime Sync: Terminal Workflows, PostgreSQL Enough, and the Tools That Still Win

Eventual Consistency

The Uptime Engineer